期刊
ASTRONOMY & ASTROPHYSICS
卷 666, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/202244056
关键词
techniques: photometric; techniques: radial velocities; stars: individual: TOI-1468; stars: late-type
资金
- Max-Planck-Gesellschaft (MPG)
- Consejo Superior de Investigaciones Cientificas (CSIC)
- Ministerio de Economia y Competitividad (MINECO)
- European Regional Development Fund (ERDF) [FICTS-2011-02, ICTS-2017-07-CAHA-4, CAHA16-CE-3978]
- Max-Planck-Institut fur Astronomie
- Instituto de Astrofisica de Andalucia
- Landessternwarte Konigstuhl
- Institut de Ciencies de l'Espai
- Institut fur Astrophysik Gottingen
- Universidad Complutense de Madrid
- Thuringer Landessternwarte Tautenburg
- Instituto de Astrofisica de Canarias
- Hamburger Sternwarte
- Centro de Astrobiologia
- Centro Astronomico Hispano-Aleman
- MINECO
- Deutsche Forschungsgemeinschaft (DFG) through the Major Research Instrumentation Programme and Research Unit [FOR2544]
- Klaus Tschira Stiftung
- state of Baden-Wurttemberg
- state of Niedersachsen
- Junta de Andalucia
- NASA's Science Mission Directorate
- David and Lucile Packard Foundation
- Heising-Simons Foundation
- Gemini Observatory
- University of Chicago
- NSF [2108465]
- NASA [80NSSC22K0117]
- Thuringer Ministerium fur Wirtschaft, Wissenschaft und Digitale Gesellschaft
- Spanish Agencia Estatal de Investigacion of the Ministerio de Ciencia e Innovacion
- ERDF A way of making Europe [PID2019-109522GB-C5[1:4], PID2019-107061GB-C64, PID2019-110689RB-100, PGC2018-098153-B-C31]
- Centre of Excellence Severo Ochoa award [CEX2019-000920-S, SEV-2017-0709, MDM-2017-0737]
- Centre of Excellence Maria de Maeztu award [CEX2019-000920-S, SEV-2017-0709, MDM-2017-0737]
- Generalitat de Catalunya/CERCA programme
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [895525]
- DFG [CH 2636/1-1]
- DFG through Excellence Cluster ORIGINS under Germany's Excellence Strategy [EXC-2094 - 390783311]
- DFG through priority programme Exploring the Diversity of Extrasolar Planets [JE 701/5-1, SPP 1992]
- Swedish National Space Agency (SNSA) [DNR 2020-00104]
- JSPS KAKENHI grants [JP17H04574, JP18H05439, JP21K13975]
- JSPS [JP20J21872]
- JST CREST Grant [JPMJCR1761]
- Astrobiology Center of National Institutes of Natural Sciences (NINS) [AB031010, AB031014]
- program Alien Earths - National Aeronautics and Space Administration [80NSSC21K0593]
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [2108465] Funding Source: National Science Foundation
We report the discovery and characterization of two small transiting planets orbiting the bright M3.0V star TOI-1468 (LSPM J0106+1913). Through precise radial velocity measurements and ground-based transit photometry, we confirm the planetary nature of these planets. The significance of this system lies in the fact that these planets are located on opposite sides of the radius valley, providing insight into the formation and evolution scenarios of small planets around M dwarfs.
We report the discovery and characterization of two small transiting planets orbiting the bright M3.0V star TOI-1468 (LSPM J0106+1913), whose transit signals were detected in the photometric time series in three sectors of the TESS mission. We confirm the planetary nature of both of them using precise radial velocity measurements from the CARMENES and MAROON-X spectrographs, and supplement them with ground-based transit photometry. A joint analysis of all these data reveals that the shorter-period planet, TOI-1468 b (P-b = 1.88 d), has a planetary mass of M-b = 3.21 +/- 0.24M(circle plus) and a radius of R-b = 1.280(-0.039)(+0.038) R-circle plus, resulting in a density of rho(b) = 8.39(-0.92)(+1.05) g cm(-3), which is consistent with a mostly rocky composition. For the outer planet, TOI-1468 c (P-c = 15.53 d), we derive a mass of M-c = 6.64(-0.68)(+0.67) M-circle plus,aradius of R-c = 2.06 +/- 0.04 R-circle plus, and a bulk density of rho(c) = 2.00(-0.19)(+0.21) g cm(-3), which corresponds to a rocky core composition with a H/He gas envelope. These planets are located on opposite sides of the radius valley, making our system an interesting discovery as there are only a handful of other systems with the same properties. This discovery can further help determine a more precise location of the radius valley for small planets around M dwarfs and, therefore, shed more light on planet formation and evolution scenarios.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据