Astronomy & Astrophysics

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Article Astronomy & Astrophysics

Improved limits on the tensor-to-scalar ratio using BICEP and Planck data

M. Tristram, A. J. Banday, K. M. Gorski, R. Keskitalo, C. R. Lawrence, K. J. Andersen, R. B. Barreiro, J. Borrill, L. P. L. Colombo, H. K. Eriksen, R. Fernandez-Cobos, T. S. Kisner, E. Martinez-Gonzalez, B. Partridge, D. Scott, T. L. Svalheim, I. K. Wehus

Summary: The study combined BICEP/Keck 2018 and Planck PR4 data to constrain the tensor-to-scalar ratio r consistently with the six parameters of the ΛCDM model, resulting in r < 0.032 at 95% confidence.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Revealing galaxy candidates out to z ∼16 with JWST observations of the lensing cluster SMACS0723

Hakim Atek, Marko Shuntov, Lukas J. Furtak, Johan Richard, Jean-Paul Kneib, Guillaume Mahler, Adi Zitrin, H. J. McCracken, Stephane Charlot, Jacopo Chevallard, Iryna Chemerynska

Summary: One of the main goals of the JWST is to study the first galaxies in the Universe. Through a systematic photometric analysis, we have discovered two galaxy candidates at z similar to 16, only 250 million years after the big bang. We have also identified candidates at z similar to 12 and z similar to 9-11, demonstrating the capabilities of JWST to uncover photometric candidates at very high redshifts.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

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Article Astronomy & Astrophysics

First look with JWST spectroscopy: Resemblance among z ∼ 8 galaxies and local analogs

D. Schaerer, R. Marques-Chaves, L. Barrufet, P. Oesch, Y. I. Izotov, R. Naidu, N. G. Guseva, G. Brammer

Summary: Deep images and near-IR spectra of galaxies in the field of the lensing cluster SMACS J0723.3-7327 were recently observed, revealing the rest-frame optical emission line spectra of galaxies in the epoch of reionization for the first time. Analysis of the emission line properties showed high excitation, low metallicity, and similarity to previous studies of local analogs. These findings demonstrate the powerful capabilities of spectroscopy in understanding early Universe galaxies.

ASTRONOMY & ASTROPHYSICS (2022)

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Article Astronomy & Astrophysics

The Pantheon plus Analysis: The Full Data Set and Light-curve Release

Dan Scolnic, Dillon Brout, Anthony Carr, Adam G. Riess, Tamara M. Davis, Arianna Dwomoh, David O. Jones, Noor Ali, Pranav Charvu, Rebecca Chen, Erik R. Peterson, Brodie Popovic, Benjamin M. Rose, Charlotte M. Wood, Peter J. Brown, Ken Chambers, David A. Coulter, Kyle G. Dettman, Georgios Dimitriadis, Alexei Filippenko, Ryan J. Foley, Saurabh W. Jha, Charles D. Kilpatrick, Robert P. Kirshner, Yen-Chen Pan, Armin Rest, Cesar Rojas-Bravo, Matthew R. Siebert, Benjamin E. Stahl, WeiKang Zheng

Summary: This study presents 1550 unique light curves of Type Ia supernovae that will be used to infer cosmological parameters. Compared to previous analyses, the number of light curves has significantly increased, particularly at low redshift. Furthermore, properties of the Type Ia supernovae are compared in this analysis. These analyses will provide measurements of cosmological parameters with high precision.

ASTROPHYSICAL JOURNAL (2022)

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Article Astronomy & Astrophysics

Fast, Slow, Early, Late: Quenching Massive Galaxies at z ∼ 0.8

Sandro Tacchella, Charlie Conroy, S. M. Faber, Benjamin D. Johnson, Joel Leja, Guillermo Barro, Emily C. Cunningham, Alis J. Deason, Puragra Guhathakurta, Yicheng Guo, Lars Hernquist, David C. Koo, Kevin McKinnon, Constance M. Rockosi, Joshua S. Speagle, Pieter van Dokkum, Hassen M. Yesuf

Summary: In this study of 161 massive galaxies at z(obs) = 0.8, a diverse range of star formation histories was identified, with a link between dust-age-metallicity. Lower-mass galaxies displayed a wide range of formation redshifts and quenching timescales, indicating a combination of internal and external mechanisms shaping galaxy evolution. The analysis supports the grow-and-quench framework, showing a continuously populated diversity of quenching timescales.

ASTROPHYSICAL JOURNAL (2022)

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Article Astronomy & Astrophysics

A classifier for spurious astrometric solutions in Gaia eDR3

Jan Rybizki, Gregory M. Green, Hans-Walter Rix, Kareem El-Badry, Markus Demleitner, Eleonora Zari, Andrzej Udalski, Richard L. Smart, Andrew Gould

Summary: The Gaia early Data Release 3 provides exquisite astrometric data for 1.47 billion sources and introduces a method to distinguish between good and bad astrometric solutions using a neural network. The method achieves high levels of purity and completeness and proves effective even for sources with positive parallaxes.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

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Article Astronomy & Astrophysics

Searching for a subpopulation of primordial black holes in LIGO-Virgo

Gabriele Franciolini, Vishal Baibhav, Valerio De Luca, Ken K. Y. Ng, Kaze W. K. Wong, Emanuele Berti, Paolo Pani, Antonio Riotto, Salvatore Vitale

Summary: This study performs a hierarchical Bayesian analysis using the GWTC-2 catalog to constrain the fraction of primordial black holes (PBHs) in the data. Different astrophysical models are taken into account, and it is found that the fraction of PBHs varies significantly depending on the assumed models. The contribution from the stable-mass-transfer isolated formation channel reduces the need for PBHs, except in explaining mass-gap events.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

More indications for lepton nonuniversality in b → sl+l-

T. Hurth, F. Mahmoudi, D. Martinez Santos, S. Neshatpour

Summary: The study by the LHCb collaboration confirms evidence for lepton flavour nonuniversality through updated measurements of R-K at a 3.1 Sigma level. Projections for future measurements suggest that LHCb may discover lepton nonuniversality in a single observable with Run 3 data. The study also analyzes other ratios and their ability to differentiate between various new physics options within effective field theory. Additionally, deviations in the ratios are compared with NP indications in angular observables of exclusive b -> sll transitions.

PHYSICS LETTERS B (2022)

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Article Astronomy & Astrophysics

A new analysis of galaxy 2-point functions in the BOSS survey, including full-shape information and post-reconstruction BAO

Shi-Fan Chen, Zvonimir Vlah, Martin White

Summary: A new method for analyzing the pre-and post-reconstruction galaxy two-point functions of the BOSS survey is presented. The post-reconstruction correlation function accurately measures the distance-redshift relation and expansion history, while the pre-reconstruction power spectrum multipoles constrain the broad-band shape and rate-of-growth of large-scale structure. The technique uses Lagrangian perturbation theory to directly work with the measured data at the level of two-point functions without approximations. Combining galaxies across the full redshift range and both hemispheres, constraints on Omega(m), H-0, and sigma(8) are obtained that are consistent with the Planck primary CMB anisotropy data and recent cosmic shear surveys.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2022)

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Article Astronomy & Astrophysics

Revealing the Mysteries of Venus: The DAVINCI Mission

James B. Garvin, Stephanie A. Getty, Giada N. Arney, Natasha M. Johnson, Erika Kohler, Kenneth O. Schwer, Michael Sekerak, Arlin Bartels, Richard S. Saylor, Vincent E. Elliott, Colby S. Goodloe, Matthew B. Garrison, Valeria Cottini, Noam Izenberg, Ralph Lorenz, Charles A. Malespin, Michael Ravine, Christopher R. Webster, David H. Atkinson, Shahid Aslam, Sushil Atreya, Brent J. Bos, William B. Brinckerhoff, Bruce Campbell, David Crisp, Justin R. Filiberto, Francois Forget, Martha Gilmore, Nicolas Gorius, David Grinspoon, Amy E. Hofmann, Stephen R. Kane, Walter Kiefer, Sebastien Lebonnois, Paul R. Mahaffy, Alexander Pavlov, Melissa Trainer, Kevin J. Zahnle, Mikhail Zolotov

Summary: The DAVINCI mission aims to explore the atmosphere and surface of Venus, providing new data on its evolutionary path and potential habitability. Incorporating science-driven flybys and an instrumented descent sphere, DAVINCI will provide a comprehensive understanding of Venus as a hot terrestrial exoplanet. The mission is set to launch in 2029, with flybys and atmospheric descent scheduled in the following years, delivering significant insights into the composition and topography of Venus.

PLANETARY SCIENCE JOURNAL (2022)

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Article Astronomy & Astrophysics

CMB-S4: Forecasting Constraints on Primordial Gravitational Waves

Kevork Abazajian, Graeme E. Addison, Peter Adshead, Zeeshan Ahmed, Daniel Akerib, Aamir Ali, Steven W. Allen, David Alonso, Marcelo Alvarez, Mustafa A. Amin, Adam Anderson, Kam S. Arnold, Peter Ashton, Carlo Baccigalupi, Debbie Bard, Denis Barkats, Darcy Barron, Peter S. Barry, James G. Bartlett, Ritoban Basu Thakur, Nicholas Battaglia, Rachel Bean, Chris Bebek, Amy N. Bender, Bradford A. Benson, Federico Bianchini, Colin A. Bischoff, Lindsey Bleem, James J. Bock, Sebastian Bocquet, Kimberly K. Boddy, J. Richard Bond, Julian Borrill, Francois R. Bouchet, Thejs Brinckmann, Michael L. Brown, Sean Bryan, Victor Buza, Karen Byrum, Carlos Hervias Caimapo, Erminia Calabrese, Victoria Calafut, Robert Caldwell, John E. Carlstrom, Julien Carron, Thomas Cecil, Anthony Challinor, Clarence L. Chang, Yuji Chinone, Hsiao-Mei Sherry Cho, Asantha Cooray, Will Coulton, Thomas M. Crawford, Abigail Crites, Ari Cukierman, Francis-Yan Cyr-Racine, Tijmen de Haan, Jacques Delabrouille, Mark Devlin, Eleonora Di Valentino, Marion Dierickx, Matt Dobbs, Shannon Duff, Cora Dvorkin, Joseph Eimer, Tucker Elleflot, Josquin Errard, Thomas Essinger-Hileman, Giulio Fabbian, Chang Feng, Simone Ferraro, Jeffrey P. Filippini, Raphael Flauger, Brenna Flaugher, Aurelien A. Fraisse, Andrei Frolov, Nicholas Galitzki, Patricio A. Gallardo, Silvia Galli, Ken Ganga, Martina Gerbino, Vera Gluscevic, Neil Goeckner-Wald, Daniel Green, Daniel Grin, Evan Grohs, Riccardo Gualtieri, Jon E. Gudmundsson, Ian Gullett, Nikhel Gupta, Salman Habib, Mark Halpern, Nils W. Halverson, Shaul Hanany, Kathleen Harrington, Masaya Hasegawa, Matthew Hasselfield, Masashi Hazumi, Katrin Heitmann, Shawn Henderson, Brandon Hensley, Charles Hill, J. Colin Hill, Renee Hlozek, Shuay-Pwu Patty Ho, Thuong Hoang, Gil Holder, William Holzapfel, John Hood, Johannes Hubmayr, Kevin M. Huffenberger, Howard Hui, Kent Irwin, Oliver Jeong, Bradley R. Johnson, William C. Jones, Jae Hwan Kang, Kirit S. Karkare, Nobuhiko Katayama, Reijo Keskitalo, Theodore Kisner, Lloyd Knox, Brian J. Koopman, Arthur Kosowsky, John Kovac, Ely D. Kovetz, Steve Kuhlmann, Chao-lin Kuo, Akito Kusaka, Anne Lahteenmaki, Charles R. Lawrence, Adrian T. Lee, Antony Lewis, Dale Li, Eric Linder, Marilena Loverde, Amy Lowitz, Phil Lubin, Mathew S. Madhavacheril, Adam Mantz, Gabriela Marques, Frederick Matsuda, Philip Mauskopf, Heather McCarrick, Jeffrey McMahon, P. Daniel Meerburg, Jean-Baptiste Melin, Felipe Menanteau, Joel Meyers, Marius Millea, Joseph Mohr, Lorenzo Moncelsi, Maria Monzani, Tony Mroczkowski, Suvodip Mukherjee, Johanna Nagy, Toshiya Namikawa, Federico Nati, Tyler Natoli, Laura Newburgh, Michael D. Niemack, Haruki Nishino, Brian Nord, Valentine Novosad, Roger O'Brient, Stephen Padin, Steven Palladino, Bruce Partridge, Don Petravick, Elena Pierpaoli, Levon Pogosian, Karthik Prabhu, Clement Pryke, Giuseppe Puglisi, Benjamin Racine, Alexandra Rahlin, Mayuri Sathyanarayana Rao, Marco Raveri, Christian L. Reichardt, Mathieu Remazeilles, Graca Rocha, Natalie A. Roe, Anirban Roy, John E. Ruhl, Maria Salatino, Benjamin Saliwanchik, Emmanuel Schaan, Alessandro Schillaci, Benjamin Schmitt, Marcel M. Schmittfull, Douglas Scott, Neelima Sehgal, Sarah Shandera, Blake D. Sherwin, Erik Shirokoff, Sara M. Simon, Anze Slosar, David Spergel, Tyler St Germaine, Suzanne T. Staggs, Antony Stark, Glenn D. Starkman, Radek Stompor, Chris Stoughton, Aritoki Suzuki, Osamu Tajima, Grant P. Teply, Keith Thompson, Ben Thorne, Peter Timbie, Maurizio Tomasi, Matthieu Tristram, Gregory Tucker, Caterina Umilta, Alexander van Engelen, Eve M. Vavagiakis, Joaquin D. Vieira, Abigail G. Vieregg, Kasey Wagoner, Benjamin Wallisch, Gensheng Wang, Scott Watson, Ben Westbrook, Nathan Whitehorn, Edward J. Wollack, W. L. Kimmy Wu, Zhilei Xu, H. Y. Eric Yang, Siavash Yasini, Volodymyr G. Yefremenko, Ki Won Yoon, Edward Young, Cyndia Yu, Andrea Zonca

Summary: CMB-S4 is the next-generation ground-based cosmic microwave background (CMB) experiment, designed to improve the sensitivity of CMB measurements and enhance our understanding of the origin and evolution of the universe. This study presents a forecasting framework that uses a power-spectrum-based semianalytic projection tool to optimize constraints on the tensor-to-scalar ratio. The framework is unique in its use of information from current CMB experiments to predict the effectiveness of future CMB-polarization endeavors. The study also includes map-based validation studies, allowing for additional complexity and independent verification of the forecasts.

ASTROPHYSICAL JOURNAL (2022)

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Article Astronomy & Astrophysics

Electroweak precision fit and new physics in light of the W boson mass

Chih-Ting Lu, Lei Wu, Yongcheng Wu, Bin Zhu

Summary: The measured W boson mass deviates significantly from the prediction of the Standard Model, indicating the presence of nondegenerate multiplets beyond the Standard Model. By performing a global electroweak fit with the new W boson, new values of the oblique parameters are obtained, which can be accommodated in the two-Higgs doublet model.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Contemporary formation of early Solar System planetesimals at two distinct radial locations

A. Morbidelli, K. Baillie, K. Batygin, S. Charnoz, T. Guillot, D. C. Rubie, T. Kleine

Summary: By modeling the evolution of a disk with ongoing material accretion, researchers demonstrate that planetesimal formation may have occurred within the first 0.5 million years by dust pile-up at both the snowline and the silicate sublimation line. Planetesimals at the two locations formed almost simultaneously, but there are distinct differences in the initial percentage of material absorption between those formed at different locations.

NATURE ASTRONOMY (2022)

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Article Astronomy & Astrophysics

The ESA Hera Mission: Detailed Characterization of the DART Impact Outcome and of the Binary Asteroid (65803) Didymos

Patrick Michel, Michael Kuppers, Adriano Campo Bagatin, Benoit Carry, Sebastien Charnoz, Julia de Leon, Alan Fitzsimmons, Paulo Gordo, Simon F. Green, Alain Herique, Martin Juzi, Ozgur Karatekin, Tomas Kohout, Monica Lazzarin, Naomi Murdoch, Tatsuaki Okada, Ernesto Palomba, Petr Pravec, Colin Snodgrass, Paolo Tortora, Kleomenis Tsiganis, Stephan Ulamec, Jean-Baptiste Vincent, Kai Wuennemann, Yun Zhang, Sabina D. Raducan, Elisabetta Dotto, Nancy Chabot, Andy F. Cheng, Andy Rivkin, Olivier Barnouin, Carolyn Ernst, Angela Stickle, Derek C. Richardson, Cristina Thomas, Masahiko Arakawa, Hirdy Miyamoto, Akiko Nakamura, Seiji Sugita, Makoto Yoshikawa, Paul Abell, Erik Asphaug, Ronald-Louis Ballouz, William F. Bottke, Dante S. Lauretta, Kevin J. Walsh, Paolo Martino, Ian Carnelli

Summary: Hera is a planetary defense mission developed by the European Space Agency, scheduled for launch in October 2024. It will rendezvous with the binary asteroid Didymos and its moon Dimorphos in December 2026. The mission aims to characterize the physical properties of Didymos and Dimorphos, measure the momentum transfer efficiency of the DART impact, and provide insights into asteroid science and the evolutionary history of our solar system.

PLANETARY SCIENCE JOURNAL (2022)

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Article Astronomy & Astrophysics

Black holes in f(Q) gravity

Fabio D'Ambrosio, Shaun D. B. Fell, Lavinia Heisenberg, Simon Kuhn

Summary: The field equations of f(Q) gravity for spherically symmetric and stationary metric-affine spacetimes were systematically studied, showing that beyond-GR solutions are possible contrary to previous claims. Specific criteria were formulated to determine conditions under which GR solutions or beyond-GR solutions are obtainable. Perturbative corrections to the Schwarzschild solution were made for various choices of f(Q), including a dynamical affine connection, and an exact beyond-GR vacuum solution was presented. The method was also applied to f(T) gravity for similar solutions without a dynamical connection.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

The ALMA REBELS survey: the dust content of z ∼ 7 Lyman break galaxies

P. Dayal, A. Ferrara, L. Sommovigo, R. Bouwens, P. A. Oesch, R. Smit, V Gonzalez, S. Schouws, M. Stefanon, C. Kobayashi, J. Bremer, H. S. B. Algera, M. Aravena, R. A. A. Bowler, E. da Cunha, Y. Fudamoto, L. Graziani, J. Hodge, H. Inami, I De Looze, A. Pallottini, D. Riechers, R. Schneider, D. Stark, R. Endsley

Summary: This article presents the inclusion of metal and dust enrichment into a semi-analytic model of galaxy formation to explain the dust content of 13 LBGs detected at z similar or equal to 7. The study finds that the dust mass in galaxies is influenced by Type II supernova dust production, astration, shock destruction, and ejection in outflows, while grain growth plays a minor role. The model predicts a dust-to-stellar mass ratio and a UV-to-total star formation rate relation that align with observations. However, there are two systems that show significantly higher dust-to-stellar mass ratios, suggesting alternative solutions are needed.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

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Article Astronomy & Astrophysics

Overview of the Instrumentation for the Dark Energy Spectroscopic Instrument

B. Abareshi, J. Aguilar, S. Ahlen, Shadab Alam, David M. Alexander, R. Alfarsy, L. Allen, C. Allende Prieto, O. Alves, J. Ameel, E. Armengaud, J. Asorey, Alejandro Aviles, S. Bailey, A. Balaguera-Antolinez, O. Ballester, C. Baltay, A. Bault, S. F. Beltran, B. Benavides, S. BenZvi, A. Berti, R. Besuner, Florian Beutler, D. Bianchi, C. Blake, P. Blanc, R. Blum, A. Bolton, S. Bose, D. Bramall, S. Brieden, A. Brodzeller, D. Brooks, C. Brownewell, E. Buckley-Geer, R. N. Cahn, Z. Cai, R. Canning, R. Capasso, A. Carnero Rosell, P. Carton, R. Casas, F. J. Castander, J. L. Cervantes-Cota, S. Chabanier, E. Chaussidon, C. Chuang, C. Circosta, S. Cole, A. P. Cooper, L. da Costa, M-C Cousinou, A. Cuceu, T. M. Davis, K. Dawson, R. De la Cruz-Noriega, A. de la Macorra, A. de Mattia, J. Della Costa, P. Demmer, M. Derwent, A. Dey, B. Dey, G. Dhungana, Z. Ding, C. Dobson, P. Doel, J. Donald-McCann, J. Donaldson, K. Douglass, Y. Duan, P. Dunlop, J. Edelstein, S. Eftekharzadeh, D. J. Eisenstein, M. Enriquez-Vargas, S. Escoffier, M. Evatt, P. Fagrelius, X. Fan, K. Fanning, V. A. Fawcett, S. Ferraro, J. Ereza, B. Flaugher, A. Font-Ribera, J. E. Forero-Romero, C. S. Frenk, S. Fromenteau, B. T. Gansicke, C. Garcia-Quintero, L. Garrison, E. Gaztanaga, F. Gerardi, H. Gil-Marin, S. Gontcho A. Gontcho, Alma X. Gonzalez-Morales, G. Gonzalez-de-Rivera, V Gonzalez-Perez, C. Gordon, O. Graur, D. Green, C. Grove, D. Gruen, G. Gutierrez, J. Guy, C. Hahn, S. Harris, D. Herrera, Hiram K. Herrera-Alcantar, K. Honscheid, C. Howlett, D. Huterer, V Irsic, M. Ishak, P. Jelinsky, L. Jiang, J. Jimenez, Y. P. Jing, R. Joyce, E. Jullo, S. Juneau, N. G. Karacayli, M. Karamanis, A. Karcher, T. Karim, R. Kehoe, S. Kent, D. Kirkby, T. Kisner, F. Kitaura, S. E. Koposov, A. Kovacs, A. Kremin, Alex Krolewski, B. L'Huillier, O. Lahav, A. Lambert, C. Lamman, Ting-Wen Lan, M. Landriau, S. Lane, D. Lang, J. U. Lange, J. Lasker, L. Le Guillou, A. Leauthaud, A. Le Van Suu, Michael E. Levi, T. S. Li, C. Magneville, M. Manera, Christopher J. Manser, B. Marshall, Paul Martini, W. McCollam, P. McDonald, Aaron M. Meisner, J. Mena-Fernandez, J. Meneses-Rizo, M. Mezcua, T. Miller, R. Miquel, P. Montero-Camacho, J. Moon, J. Moustakas, E. Mueller, Andrea Munoz-Gutierrez, Adam D. Myers, S. Nadathur, J. Najita, L. Napolitano, E. Neilsen, Jeffrey A. Newman, J. D. Nie, Y. Ning, G. Niz, P. Norberg, Hernan E. Noriega, T. O'Brien, A. Obuljen, N. Palanque-Delabrouille, A. Palmese, P. Zhiwei, D. Pappalardo, X. Peng, W. J. Percival, S. Perruchot, R. Pogge, C. Poppett, A. Porredon, F. Prada, J. Prochaska, R. Pucha, A. Perez-Fernandez, I Perez-Rafols, D. Rabinowitz, A. Raichoor, S. Ramirez-Solano, Cesar Ramirez-Perez, C. Ravoux, K. Reil, M. Rezaie, A. Rocher, C. Rockosi, N. A. Roe, A. Roodman, A. J. Ross, G. Rossi, R. Ruggeri, V Ruhlmann-Kleider, C. G. Sabiu, S. Safonova, K. Said, A. Saintonge, Javier Salas Catonga, L. Samushia, E. Sanchez, C. Saulder, E. Schaan, E. Schlafly, D. Schlegel, J. Schmoll, D. Scholte, M. Schubnell, A. Secroun, H. Seo, S. Serrano, Ray M. Sharples, Michael J. Sholl, Joseph Harry Silber, D. R. Silva, M. Sirk, M. Siudek, A. Smith, D. Sprayberry, R. Staten, B. Stupak, T. Tan, Gregory Tarle, Suk Sien Tie, R. Tojeiro, L. A. Urena-Lopez, F. Valdes, O. Valenzuela, M. Valluri, M. Vargas-Magana, L. Verde, M. Walther, B. Wang, M. S. Wang, B. A. Weaver, C. Weaverdyck, R. Wechsler, Michael J. Wilson, J. Yang, Y. Yu, S. Yuan, Christophe Yeche, H. Zhang, K. Zhang, Cheng Zhao, Rongpu Zhou, Zhimin Zhou, H. Zou, J. Zou, S. Zou, Y. Zu

Summary: The Dark Energy Spectroscopic Instrument (DESI) is a 5-year survey aimed at exploring the nature of dark energy through spectroscopic measurements of 40 million galaxies and quasars. It has been successfully installed and has achieved all of its performance goals.

ASTRONOMICAL JOURNAL (2022)

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Article Astronomy & Astrophysics

The PHANGS-HST Survey: Physics at High Angular Resolution in Nearby Galaxies with the Hubble Space Telescope

Janice C. Lee, Bradley C. Whitmore, David A. Thilker, Sinan Deger, Kirsten L. Larson, Leonardo Ubeda, Gagandeep S. Anand, Mederic Boquien, Rupali Chandar, Daniel A. Dale, Eric Emsellem, Adam K. Leroy, Erik Rosolowsky, Eva Schinnerer, Ludo Schmidt, James Lilly, Jordan Turner, Schuyler Van Dyk, Richard L. White, Ashley T. Barnes, Francesco Belfiore, Frank Bigiel, Guillermo A. Blanc, Yixian Cao, Melanie Chevance, Enrico Congiu, Oleg Egorov, Simon C. O. Glover, Kathryn Grasha, Brent Groves, Jonathan D. Henshaw, Annie Hughes, Ralf S. Klessen, Eric Koch, Kathryn Kreckel, J. M. Diederik Kruijssen, Daizhong Liu, Laura A. Lopez, Ness Mayker, Sharon E. Meidt, Eric J. Murphy, Hsi-An Pan, Jerome Pety, Miguel Querejeta, Alessandro Razza, Toshiki Saito, Patricia Sanchez-Blazquez, Francesco Santoro, Amy Sardone, Fabian Scheuermann, Andreas Schruba, Jiayi Sun, Antonio Usero, E. Watkins, Thomas G. Williams

Summary: The PHANGS program is creating the first dataset to study star formation in nearby spiral galaxies, utilizing large survey programs with ALMA, MUSE, and HST.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2022)

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Article Astronomy & Astrophysics

GOLDRUSH. IV. Luminosity Functions and Clustering Revealed with ∼4,000,000 Galaxies at z ∼ 2-7: Galaxy-AGN Transition, Star Formation Efficiency, and Implication for Evolution at z > 10

Yuichi Harikane, Yoshiaki Ono, Masami Ouchi, Chengze Liu, Marcin Sawicki, Takatoshi Shibuya, Peter S. Behroozi, Wanqiu He, Kazuhiro Shimasaku, Stephane Arnouts, Jean Coupon, Seiji Fujimoto, Stephen Gwyn, Jiasheng Huang, Akio K. Inoue, Nobunari Kashikawa, Yutaka Komiyama, Yoshiki Matsuoka, Chris J. Willott

Summary: This study presents new measurements of rest-UV luminosity functions and angular correlation functions of galaxies at redshifts around 2-7. The findings confirm previous studies and reveal the existence of a bright-end excess in the galaxy luminosity function, possibly attributed to inefficient mass quenching, low dust obscuration, and/or hidden AGN activity. Additionally, the study shows a weak redshift evolution in the ratio of star formation rate to dark matter accretion rate, which will be further tested by the James Webb Space Telescope.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2022)

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Article Astronomy & Astrophysics

Muonic boson limits: Supernova redux

Andrea Caputo, Georg Raffelt, Edoardo Vitagliano

Summary: This research focuses on deriving supernova bounds on muon-philic bosons, considering factors like scalar phi and pseudoscalar a, as well as the generic two-photon coupling implied by a muon triangle loop. The results show that SN arguments become interesting mainly for larger boson masses, and constraints are derived based on SN 1987A gamma rays and the diffuse cosmic gamma-ray background. The study also discusses the implications on boson emission in different scenarios like escaping freely from the SN core or being in the trapping regime.

PHYSICAL REVIEW D (2022)

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