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Article Astronomy & Astrophysics

Two Remarkably Luminous Galaxy Candidates at z ≈ 10-12 Revealed by JWST

Rohan P. Naidu, Pascal A. Oesch, Pieter van Dokkum, Erica J. Nelson, Katherine A. Suess, Gabriel Brammer, Katherine E. Whitaker, Garth Illingworth, Rychard Bouwens, Sandro Tacchella, Jorryt Matthee, Natalie Allen, Rachel Bezanson, Charlie Conroy, Ivo Labbe, Joel Leja, Ecaterina Leonova, Dan Magee, Sedona H. Price, David J. Setton, Victoria Strait, Mauro Stefanon, Sune Toft, John R. Weaver, Andrea Weibel

Summary: Researchers have used JWST/NIRCam to search for bright galaxies in the last unexplored epoch of the universe (around a few hundred million years ago with z > 10). They have identified two candidate galaxies, which show spectral features suggesting they may have formed stars with a mass of around 10^9 solar masses in approximately 300-400 million years. These findings challenge previous predictions of the number density of such bright sources at high redshifts.

ASTROPHYSICAL JOURNAL LETTERS (2022)

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Article Astronomy & Astrophysics

The Pantheon plus Analysis: Cosmological Constraints

Dillon Brout, Dan Scolnic, Brodie Popovic, Adam G. Riess, Anthony Carr, Joe Zuntz, Rick Kessler, Tamara M. Davis, Samuel Hinton, David Jones, W. D'Arcy Kenworthy, Erik R. Peterson, Khaled Said, Georgie Taylor, Noor Ali, Patrick Armstrong, Pranav Charvu, Arianna Dwomoh, Cole Meldorf, Antonella Palmese, Helen Qu, Benjamin M. Rose, Bruno Sanchez, Christopher W. Stubbs, Maria Vincenzi, Charlotte M. Wood, Peter J. Brown, Rebecca Chen, Ken Chambers, David A. Coulter, Mi Dai, Georgios Dimitriadis, Alexei Filippenko, Ryan J. Foley, Saurabh W. Jha, Lisa Kelsey, Robert P. Kirshner, Anais Moller, Jessie Muir, Seshadri Nadathur, Yen-Chen Pan, Armin Rest, Cesar Rojas-Bravo, Masao Sako, Matthew R. Siebert, Mat Smith, Benjamin E. Stahl, Phil Wiseman

Summary: This study presents constraints on cosmological parameters based on 1701 light curves of 1550 distinct Type Ia supernovae. By increasing the sample size, improving systematic uncertainty treatments, and adding cross-calibrated photometric systems, the cosmological constraining power has been significantly improved. The results indicate a consistent cosmological constant and provide precise measurements on the evolution of dark energy.

ASTROPHYSICAL JOURNAL (2022)

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Article Astronomy & Astrophysics

The JWST Early Release Observations

Klaus M. Pontoppidan, Jaclyn Barrientes, Claire Blome, Hannah Braun, Matthew Brown, Margaret Carruthers, Dan Coe, Joseph DePasquale, Nestor Espinoza, Macarena Garcia Marin, Karl D. Gordon, Alaina Henry, Leah Hustak, Andi James, Ann Jenkins, Anton M. Koekemoer, Stephanie LaMassa, David Law, Alexandra Lockwood, Amaya Moro-Martin, Susan E. Mullally, Alyssa Pagan, Dani Player, Charles Proffitt, Christine Pulliam, Leah Ramsay, Swara Ravindranath, Neill Reid, Massimo Robberto, Elena Sabbi, Leonardo Ubeda, Michael Balogh, Kathryn Flanagan, Jonathan Gardner, Hashima Hasan, Bonnie Meinke, Antonella Nota

Summary: The James Webb Space Telescope Early Release Observations are a set of public outreach products that demonstrate the readiness and capability of JWST for scientific research.

ASTROPHYSICAL JOURNAL LETTERS (2022)

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Article Astronomy & Astrophysics

A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ∼ 12 Galaxy in Early JWST CEERS Imaging

Steven L. Finkelstein, Micaela B. Bagley, Pablo Arrabal Haro, Mark Dickinson, Henry C. Ferguson, Jeyhan S. Kartaltepe, Casey Papovich, Denis Burgarella, Dale D. Kocevski, Marc Huertas-Company, Kartheik G. Iyer, Anton M. Koekemoer, Rebecca L. Larson, Pablo G. Perez-Gonzalez, Caitlin Rose, Sandro Tacchella, Stephen M. Wilkins, Katherine Chworowsky, Aubrey Medrano, Alexa M. Morales, Rachel S. Somerville, L. Y. Aaron Yung, Adriano Fontana, Mauro Giavalisco, Andrea Grazian, Norman A. Grogin, Lisa J. Kewley, Allison Kirkpatrick, Peter Kurczynski, Jennifer M. Lotz, Laura Pentericci, Nor Pirzkal, Swara Ravindranath, Russell E. Ryan, Jonathan R. Trump, Guang Yang, Omar Almaini, Ricardo O. Amorin, Marianna Annunziatella, Bren E. Backhaus, Guillermo Barro, Peter Behroozi, Eric F. Bell, Rachana Bhatawdekar, Laura Bisigello, Volker Bromm, Veronique Buat, Fernando Buitrago, Antonello Calabro, Caitlin M. Casey, Marco Castellano, Oscar A. Chavez Ortiz, Laure Ciesla, Nikko J. Cleri, Seth H. Cohen, Justin W. Cole, Kevin C. Cooke, M. C. Cooper, Asantha R. Cooray, Luca Costantin, Isabella G. Cox, Darren Croton, Emanuele Daddi, Romeel Dave, Alexander de la Vega, Avishai Dekel, David Elbaz, Vicente Estrada-Carpenter, Sandra M. Faber, Vital Fernandez, Keely D. Finkelstein, Jonathan Freundlich, Seiji Fujimoto, Angela Garcia-Argumanez, Jonathan P. Gardner, Eric Gawiser, Carlos Gomez-Guijarro, Yuchen Guo, Kurt Hamblin, Timothy S. Hamilton, Nimish P. Hathi, Benne W. Holwerda, Michaela Hirschmann, Taylor A. Hutchison, Anne E. Jaskot, Saurabh W. Jha, Shardha Jogee, Stephanie Juneau, Intae Jung, Susan A. Kassin, Aurelien Le Bail, Gene C. K. Leung, Ray A. Lucas, Benjamin Magnelli, Kameswara Bharadwaj Mantha, Jasleen Matharu, Elizabeth J. McGrath, Daniel H. McIntosh, Emiliano Merlin, Bahram Mobasher, Jeffrey A. Newman, David C. Nicholls, Viraj Pandya, Marc Rafelski, Kaila Ronayne, Paola Santini, Lise-Marie Seille, Ekta A. Shah, Lu Shen, Raymond C. Simons, Gregory F. Snyder, Elizabeth R. Stanway, Amber N. Straughn, Harry Teplitz, Brittany N. Vanderhoof, Jesus Vega-Ferrero, Weichen Wang, Benjamin J. Weiner, Christopher N. A. Willmer, Stijn Wuyts, Jorge A. Zavala

Summary: In this study, the discovery of a candidate galaxy with a photo-z of approximately 12 in the Cosmis Evolution Early Release Science Survey was reported. The source was identified based on conservative selection criteria and has been validated through observations. The properties of this galaxy suggest that it is a young and rapidly forming galaxy.

ASTROPHYSICAL JOURNAL LETTERS (2022)

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Article Astronomy & Astrophysics

The Near-Infrared Spectrograph (NIRSpec) on the James Webb Space Telescope I. Overview of the instrument and its capabilities

P. Jakobsen, P. Ferruit, C. Alves de Oliveira, S. Arribas, G. Bagnasco, R. Barho, T. L. Beck, S. Birkmann, T. Boker, A. J. Bunker, S. Charlot, P. de Jong, G. de Marchi, R. Ehrenwinkler, M. Falcolini, R. Fels, M. Franx, D. Franz, M. Funke, G. Giardino, X. Gnata, W. Holota, K. Honnen, P. L. Jensen, M. Jentsch, T. Johnson, D. Jollet, H. Karl, G. Kling, J. Koehler, M-G Kolm, N. Kumari, M. E. Lander, R. Lemke, M. Lopez-Caniego, N. Lutzgendorf, R. Maiolino, E. Manjavacas, A. Marston, M. Maschmann, R. Maurer, B. Messerschmidt, S. H. Moseley, P. Mosner, D. B. Mott, J. Muzerolle, N. Pirzkal, J-F Pittet, A. Plitzke, W. Posselt, B. Rapp, B. J. Rauscher, T. Rawle, H-W Rix, A. Roedel, P. Rumler, E. Sabbi, J-C Salvignol, T. Schmid, M. Sirianni, C. Smith, P. Strada, M. te Plate, J. Valenti, T. Wettemann, T. Wiehe, M. Wiesmayer, C. J. Willott, R. Wright, P. Zeidler, C. Zincke

Summary: This article provides an overview of the design and capabilities of the near-infrared spectrograph (NIRSpec) onboard the James Webb Space Telescope, including its measurement modes, wavelength ranges, and performance requirements.

ASTRONOMY & ASTROPHYSICS (2022)

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Article Astronomy & Astrophysics

PSR J0952-0607: The Fastest and Heaviest Known Galactic Neutron Star

Roger W. Romani, D. Kandel, Alexei Filippenko, Thomas G. Brink, WeiKang Zheng

Summary: We describe the Keck-telescope spectrophotometry and imaging of the companion of the black widow pulsar PSR J0952-0607. Despite the challenges posed by its faintness at minimum brightness, we were able to measure multicolor light curves and obtain radial velocities over half of the orbit. Our model fits indicate the system inclination and the mass of the pulsar, which is the largest well-measured mass found to date. This study is important for understanding the mass evolution of neutron stars.

ASTROPHYSICAL JOURNAL LETTERS (2022)

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Article Astronomy & Astrophysics

Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G=18.5

F. Anders, A. Khalatyan, A. B. A. Queiroz, C. Chiappini, J. Ardevol, L. Casamiquela, F. Figueras, O. Jimenez-Arranz, C. Jordi, M. Monguio, M. Romero-Gomez, D. Altamirano, T. Antoja, R. Assaad, T. Cantat-Gaudin, A. Castro-Ginard, H. Enke, L. Girardi, G. Guiglion, S. Khan, X. Luri, A. Miglio, I Minchev, P. Ramos, B. X. Santiago, M. Steinmetz

Summary: This article presents a catalogue of 362 million stellar parameters, distances, and extinctions derived from Gaia's Early Data Release (EDR3) cross-matched with other photometric catalogues. The results show improved accuracy and precision compared to previous estimates, validated by comparisons with other measurements. The article also provides visual representations of stellar density and substructures in the Milky Way and beyond.

ASTRONOMY & ASTROPHYSICS (2022)

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Article Astronomy & Astrophysics

Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to data calibration

A. Amon, D. Gruen, M. A. Troxel, N. MacCrann, S. Dodelson, A. Choi, C. Doux, L. F. Secco, S. Samuroff, E. Krause, J. Cordero, J. Myles, J. DeRose, R. H. Wechsler, M. Gatti, A. Navarro-Alsina, G. M. Bernstein, B. Jain, J. Blazek, A. Alarcon, A. Ferte, P. Lemos, M. Raveri, A. Campos, J. Prat, C. Sanchez, M. Jarvis, O. Alves, F. Andrade-Oliveira, E. Baxter, K. Bechtol, M. R. Becker, S. L. Bridle, H. Camacho, A. Carnero Rosell, M. Carrasco Kind, R. Cawthon, C. Chang, R. Chen, P. Chintalapati, M. Crocce, C. Davis, H. T. Diehl, A. Drlica-Wagner, K. Eckert, T. F. Eifler, J. Elvin-Poole, S. Everett, X. Fang, P. Fosalba, O. Friedrich, E. Gaztanaga, G. Giannini, R. A. Gruendl, I Harrison, W. G. Hartley, K. Herner, H. Huang, E. M. Huff, D. Huterer, N. Kuropatkin, P. Leget, A. R. Liddle, J. McCullough, J. Muir, S. Pandey, Y. Park, A. Porredon, A. Refregier, R. P. Rollins, A. Roodman, R. Rosenfeld, A. J. Ross, E. S. Rykoff, J. Sanchez, I Sevilla-Noarbe, E. Sheldon, T. Shin, A. Troja, I Tutusaus, I Tutusaus, T. N. Varga, N. Weaverdyck, B. Yanny, B. Yin, Y. Zhang, J. Zuntz, M. Aguena, S. Allam, J. Annis, D. Bacon, E. Bertin, S. Bhargava, D. Brooks, E. Buckley-Geer, D. L. Burke, J. Carretero, M. Costanzi, L. N. da Costa, M. E. S. Pereira, J. De Vicente, S. Desai, J. P. Dietrich, P. Doel, I Ferrero, B. Flaugher, J. Frieman, J. Garcia-Bellido, E. Gaztanaga, D. W. Gerdes, T. Giannantonio, J. Gschwend, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, B. Hoyle, D. J. James, R. Kron, K. Kuehn, O. Lahav, M. Lima, H. Lin, M. A. G. Maia, J. L. Marshall, P. Martini, P. Melchior, F. Menanteau, R. Miquel, J. J. Mohr, R. Morgan, R. L. C. Ogando, A. Palmese, F. Paz-Chinchon, D. Petravick, A. Pieres, A. K. Romer, E. Sanchez, V Scarpine, M. Schubnell, S. Serrano, M. Smith, M. Soares-Santos, G. Tarle, D. Thomas, C. To, J. Weller

Summary: This work presents the Dark Energy Survey Year 3 cosmic-shear measurements and cosmological constraints based on an analysis of over 100 million source galaxies, while a companion paper provides further details. The measurements are consistent with the Λ CDM model and yield precise results for the clustering amplitude and S-8. The low-redshift measurements agree with the Planck Cosmic Microwave Background result, but the high-redshift prediction is lower. The measurements demonstrate internal consistency and robustness to calibration systematics and blending of galaxies. The precision of the cosmological constraints is mainly limited by modeling baryonic effects and intrinsic alignments.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

An Empirical Background Model for the NICER X-Ray Timing Instrument

Ronald A. Remillard, Michael Loewenstein, James F. Steiner, Gregory Y. Prigozhin, Beverly LaMarr, Teruaki Enoto, Keith C. Gendreau, Zaven Arzoumanian, Craig Markwardt, Arkadip Basak, Abigail L. Stevens, Paul S. Ray, Diego Altamirano, Douglas J. K. Buisson

Summary: The study utilized an empirical three-parameter model based on observations to predict the background spectrum of the Neutron Star Interior Composition Explorer. By applying filtering criteria to select background GTIs, the study estimated detection limits and identified the need for additional model parameters to improve predictions.

ASTRONOMICAL JOURNAL (2022)

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Review Astronomy & Astrophysics

Fast radio bursts at the dawn of the 2020s

E. Petroff, J. W. T. Hessels, D. R. Lorimer

Summary: Since the discovery of the first fast radio burst (FRB) in 2007, the study of FRBs has expanded rapidly. Recent observations have provided a wealth of information about FRBs, including their abundance, repeaters, host galaxies, and source activity. Surprising discoveries, such as the connection between FRBs and magnetars and the localization of FRBs to specific clusters, have also been made.

ASTRONOMY AND ASTROPHYSICS REVIEW (2022)

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Article Astronomy & Astrophysics

Nonlinear electrodynamics effects on the black hole shadow, deflection angle, quasinormal modes and greybody factors

M. Okyay, A. Ovgun

Summary: In this paper, the effects of nonlinear electrodynamics (NED) on non-rotating black holes are discussed, including various observable and physical properties. It is found that the NED black hole is always surrounded by an event horizon and any magnetic charge is permissible. The black hole gets colder with increasing charge, and the observed shadow radius is strongly affected by the magnetic charge parameter P. The introduction of charge steepens the greybody factor of the black hole.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2022)

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Article Astronomy & Astrophysics

The GLASS-JWST Early Release Science Program. I. Survey Design and Release Plans

T. Treu, G. Roberts-Borsani, M. Bradac, G. Brammer, A. Fontana, A. Henry, C. Mason, T. Morishita, L. Pentericci, X. Wang, A. Acebron, M. Bagley, P. Bergamini, D. Belfiori, A. Bonchi, K. Boyett, K. Boutsia, A. Calabro, G. B. Caminha, M. Castellano, A. Dressler, K. Glazebrook, C. Grillo, C. Jacobs, T. Jones, P. L. Kelly, N. Leethochawalit, M. A. Malkan, D. Marchesini, S. Mascia, A. Mercurio, E. Merlin, T. Nanayakkara, M. Nonino, D. Paris, B. Poggianti, P. Rosati, P. Santini, C. Scarlata, H. Shipley, V Strait, M. Trenti, C. Tubthong, E. Vanzella, B. Vulcani, L. Yang

Summary: The GLASS-JWST Early Release Science program aims to acquire and share the deepest extragalactic data, addressing key questions about ionization in the Universe and baryon cycling in galaxies. It also facilitates various scientific investigations and will release high-level data products for the wider astronomical community to use.

ASTROPHYSICAL JOURNAL (2022)

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Article Astronomy & Astrophysics

Stellar and substellar companions from Gaia EDR3 Proper-motion anomaly and resolved common proper-motion pairs

Pierre Kervella, Frederic Arenou, Frederic Thevenin

Summary: The multiplicity survey is significantly improved by using a combination of the PMa, CPM, and RUWE indicators, which enhances the exhaustivity of companion detection and improves accuracy. The detection of CPM companions for bright stars provides a useful proxy for estimating their distance with higher accuracy than the HIPPARCOS method.

ASTRONOMY & ASTROPHYSICS (2022)

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Article Astronomy & Astrophysics

Introducing the thesan project: radiation-magnetohydrodynamic simulations of the epoch of reionization

R. Kannan, E. Garaldi, A. Smith, R. Pakmor, V Springel, M. Vogelsberger, L. Hernquist

Summary: The THESAN project introduces large volume simulations that model the intergalactic medium during reionization and the characteristics of galaxies responsible for it. They find that different reionization models result in varied bubble size distributions, which can be observed through 21 cm radio signals.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

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Article Astronomy & Astrophysics

Incremental Fermi Large Area Telescope Fourth Source Catalog

S. Abdollahi, F. Acero, L. Baldini, J. Ballet, D. Bastieri, R. Bellazzini, B. Berenji, A. Berretta, E. Bissaldi, R. D. Blandford, E. Bloom, R. Bonino, A. Brill, R. J. Britto, P. Bruel, T. H. Burnett, S. Buson, R. A. Cameron, R. Caputo, P. A. Caraveo, D. Castro, S. Chaty, C. C. Cheung, G. Chiaro, N. Cibrario, S. Ciprini, J. Coronado-Blazquez, M. Crnogorcevic, S. Cutini, F. D'Ammando, S. De Gaetano, S. W. Digel, N. Di Lalla, F. Dirirsa, L. Di Venere, A. Dominguez, V. Fallah Ramazani, S. J. Fegan, E. C. Ferrara, A. Fiori, H. Fleischhack, A. Franckowiak, Y. Fukazawa, S. Funk, P. Fusco, G. Galanti, V. Gammaldi, F. Gargano, S. Garrappa, D. Gasparrini, F. Giacchino, N. Giglietto, F. Giordano, M. Giroletti, T. Glanzman, D. Green, I. A. Grenier, M. -H. Grondin, L. Guillemot, S. Guiriec, M. Gustafsson, A. K. Harding, E. Hays, J. W. Hewitt, D. Horan, X. Hou, G. Johannesson, C. Karwin, T. Kayanoki, M. Kerr, M. Kuss, D. Landriu, S. Larsson, L. Latronico, M. Lemoine-Goumard, J. Li, I. Liodakis, F. Longo, F. Loparco, B. Lott, P. Lubrano, S. Maldera, D. Malyshev, A. Manfreda, G. Marti-Devesa, M. N. Mazziotta, I. Mereu, M. Meyer, P. F. Michelson, N. Mirabal, W. Mitthumsiri, T. Mizuno, A. A. Moiseev, M. E. Monzani, A. Morselli, I. V. Moskalenko, M. Negro, E. Nuss, N. Omodei, M. Orienti, E. Orlando, D. Paneque, Z. Pei, J. S. Perkins, M. Persic, M. Pesce-Rollins, V. Petrosian, R. Pillera, H. Poon, T. A. Porter, G. Principe, S. Raino, R. Rando, B. Rani, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, T. Reposeur, M. Sanchez-Conde, P. M. Saz Parkinson, L. Scotton, D. Serini, C. Sgro, E. J. Siskind, D. A. Smith, G. Spandre, P. Spinelli, K. Sueoka, D. J. Suson, H. Tajima, D. Tak, J. B. Thayer, D. J. Thompson, D. F. Torres, E. Troja, J. Valverde, K. Wood, G. Zaharijas

Summary: An incremental version (4FGL-DR3) of the fourth Fermi Large Area Telescope (LAT) catalog of gamma-ray sources is presented, which contains 6658 sources based on the first 12 years of science data. The analysis improves on the previous catalog by introducing better spectral parameterization for pulsars and extending the spectral points to 1 TeV. Updates are made to the spectral parameters, spectral energy distributions, and associations for all sources.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2022)

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Article Astronomy & Astrophysics

CASA, Common Astronomy Software Applications for Radio Astronomy

Ben Bean, C. A. S. A. Team CASA Team, Sanjay Bhatnagar, Sandra Castro, Jennifer Donovan Meyer, Bjorn Emonts, Enrique Garcia, Robert Garwood, Kumar Golap, Justo Gonzalez Villalba, Pamela Harris, Yohei Hayashi, Josh Hoskins, Mingyu Hsieh, Preshanth Jagannathan, Wataru Kawasaki, Aard Keimpema, Mark Kettenis, Jorge Lopez, Joshua Marvil, Joseph Masters, Andrew McNichols, David Mehringer, Renaud Miel, George Moellenbrock, Federico Montesino, Takeshi Nakazato, Juergen Ott, Dirk Petry, Martin Pokorny, Ryan Raba, Urvashi Rau, Darrell Schiebel, Neal Schweighart, Srikrishna Sekhar, Kazuhiko Shimada, Jan-Willem Steeb, Des Small, Kanako Sugimoto, Ville Suoranta, Takahiro M. Tsutsumi, Ilse van Bemmel, Marjolein Verkouter, Akeem Wells, Wei Xiong, Arpad Szomoru, Morgan Griffith, Brian Glendenning, Jeff Kern

Summary: CASA is the primary data processing software for ALMA and VLA, and it can handle data from single-dish, aperture-synthesis, and VLBI telescopes. This paper provides an overview of the basic structure of CASA and the procedures for calibrating and imaging astronomical radio data in CASA.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC (2022)

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Article Astronomy & Astrophysics

The evolution of the galaxy UV luminosity function at redshifts z ≃ 8-15 from deep JWST and ground-based near-infrared imaging

C. T. Donnan, D. J. McLeod, J. S. Dunlop, R. J. McLure, A. C. Carnall, R. Begley, F. Cullen, M. L. Hamadouche, R. A. A. Bowler, D. Magee, H. J. McCracken, B. Milvang-Jensen, A. Moneti, T. Targett

Summary: We analyze JWST ERO and ERS NIRCam imaging in combination with ground-based near-infrared imaging to measure the evolving galaxy UV luminosity function and estimate the UV luminosity density and cosmic star formation rate density at high redshifts. Our results confirm a double power law description of the high-redshift LF and show a gradual decline up to z≈15. We also identify 47 new high-redshift galaxy candidates.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

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Article Astronomy & Astrophysics

On the Evolution of the Hubble Constant with the SNe Ia Pantheon Sample and Baryon Acoustic Oscillations: A Feasibility Study for GRB-Cosmology in 2030

Maria Giovanna Dainotti, Biagio De Simone, Tiziano Schiavone, Giovanni Montani, Enrico Rinaldi, Gaetano Lambiase, Malgorzata Bogdan, Sahil Ugale

Summary: This paper discusses the evolution of the Hubble constant and presents conclusions based on the analysis of supernovae and acoustic oscillation data. The study finds a decreasing trend with eta in the sample, which may be related to astrophysical biases or modified gravity theories. This research is important for understanding the evolution of the Hubble constant.

GALAXIES (2022)

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Article Astronomy & Astrophysics

Early Results from GLASS-JWST. III. Galaxy Candidates at z ∼9-15*

Marco Castellano, Adriano Fontana, Tommaso Treu, Paola Santini, Emiliano Merlin, Nicha Leethochawalit, Michele Trenti, Eros Vanzella, Uros Mestric, Andrea Bonchi, Davide Belfiori, Mario Nonino, Diego Paris, Gianluca Polenta, Guido Roberts-Borsani, Kristan Boyett, Marusa Bradac, Antonello Calabro, Karl Glazebrook, Claudio Grillo, Sara Mascia, Charlotte Mason, Amata Mercurio, Takahiro Morishita, Themiya Nanayakkara, Laura Pentericci, Piero Rosati, Benedetta Vulcani, Xin Wang, Lilan Yang

Summary: In this study, we present the results of a search for galaxy candidates with redshifts around z=9-15 using deep seven-band NIRCam imaging from the GLASS-JWST Early Release Science Program. We identified several candidates using different versions of the Lyman-break technique and obtained their photometric redshifts. These candidates include two bright galaxies with redshifts greater than z=10, which is unexpected given the survey volume.

ASTROPHYSICAL JOURNAL LETTERS (2022)

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Article Astronomy & Astrophysics

Barrow entropic dark energy: A member of generalized holographic dark energy family

Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul

Summary: In this study, the holographic cut-off in the formalism of generalized holographic dark energy (HDE) is generalized to depend on the particle horizon, future horizon, and scale factor of the universe. It is shown that the Barrow entropic dark energy (DE) model is equivalent to the generalized HDE, where the holographic cut-off is determined by the first-order derivative of the particle horizon or future horizon. The equivalence is extended to consider the variation of the Barrow entropy exponent with the cosmological expansion.

PHYSICS LETTERS B (2022)

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