TOI-3235 b: A Transiting Giant Planet around an M4 Dwarf Star

被引：16

作者：

Hobson, Melissa J. ^{[1
,2
]}

Jordan, Andres ^{[2
,3
,4
]}

Bryant, E. M. ^{[5
,6
,7
]}

Brahm, R. ^{[2
,3
,4
]}

Bayliss, D. ^{[5
]}

Hartman, J. D. ^{[8
]}

Bakos, G. A. ^{[8
]}

Henning, Th. ^{[1
]}

Almenara, Jose Manuel ^{[9
]}

Barkaoui, Khalid ^{[10
,11
,12
]}

Benkhaldoun, Zouhair ^{[13
]}

Bonfils, Xavier ^{[9
]}

Bouchy, Francois ^{[14
]}

Charbonneau, David ^{[15
]}

Cointepas, Marion ^{[9
,14
]}

Collins, Karen A. ^{[15
]}

Eastman, Jason D. ^{[15
]}

Ghachoui, Mourad ^{[10
,13
]}

Gillon, Michael ^{[10
]}

Goeke, Robert F. ^{[16
,17
]}

Horne, Keith ^{[18
]}

Irwin, Jonathan M. ^{[19
]}

Jehin, Emmanuel ^{[20
]}

Jenkins, Jon M. ^{[21
]}

Latham, David W. ^{[15
]}

Moldovan, Dan ^{[22
]}

Murgas, Felipe ^{[9
,23
,24
]}

Pozuelos, Francisco J. ^{[10
,20
,25
]}

Ricker, George R. ^{[16
,17
]}

Schwarz, Richard P. ^{[15
]}

Seager, S. ^{[16
,17
,26
,27
]}

Srdoc, Gregor ^{[28
]}

Striegel, Stephanie ^{[29
]}

Timmermans, Mathilde ^{[10
]}

Vanderburg, Andrew ^{[16
,17
]}

Vanderspek, Roland ^{[16
,17
]}

Winn, Joshua N. ^{[30
]}

机构：

[1] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[2] Millennium Inst Astrophys MAS, Nuncio Monsenor Sotero Sanz 100, Santiago, Providencia, Chile

[3] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Ave Diagonal Torres 2640, Santiago, Chile

[4] Data Observ Fdn, Santiago, Chile

[5] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, England

[6] Univ Warwick, Ctr Exoplanets & Habitabil, Gibbet Hill Rd, Coventry CV4 7AL, England

[7] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England

[8] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

[9] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France

[10] Univ Liege, Astrobiol Res Unit, 19C Allee 6 Aout, B-4000 Liege, Belgium

[11] MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[12] Inst Astrofis Canarias IAC, Calle Via Lactea S-N, E-38200 Tenerife, Spain

[13] Cadi Ayyad Univ, Fac Sci Semlalia, High Energy Phys & Astrophys Lab, Oukaimeden Observ, Marrakech, Morocco

[14] Univ Geneva, Dept Astron, Observ Geneve, Chemin Pegasi 51B, CH-1290 Versoix, Switzerland

[15] Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[16] MIT, Dept Phys, Cambridge, MA 02139 USA

[17] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

[18] Univ St Andrews, SUPA Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[19] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[20] Univ Liege, Space Sci Technol & Astrophys Res STAR Inst, Liege, Belgium

[21] NASA Ames Res Ctr, Moffett Field, CA 94035 USA

[22] Google, Cambridge, MA USA

[23] Inst Astrofis Canarias IAC, E-38200 Tenerife, Spain

[24] Univ La Laguna ULL, Dept Astrofis, E-38206 Tenerife, Spain

[25] Inst Astrofis Andalucia IAA CSIC, Glorieta Astron S-N, E-18008 Granada, Spain

[26] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

[27] MIT, Dept Aeronaut & Astronaut, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[28] Kotizarovci Observ, Sarsoni 90, Viskovo 51216, Croatia

[29] San Jose State Univ, 1 Washington Sq, San Jose, CA 95192 USA

[30] Princeton Univ, Dept Astrophys Sci, 4 Ivy Lane, Princeton, NJ 08544 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2023年 / 946卷 / 01期

基金：

美国国家航空航天局; 欧洲研究理事会; 瑞士国家科学基金会; 美国国家科学基金会;

关键词：

LIMB-DARKENING COEFFICIENTS; LOW-MASS STAR; METALLICITY RELATION; ERROR-CORRECTION; MESA ISOCHRONES; K KEPLER; ALGORITHM; SEARCH; TESS; II;

D O I：

10.3847/2041-8213/acbd9a

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the discovery of TOI-3235 b, a short-period Jupiter orbiting an M dwarf with a stellar mass close to the critical mass at which stars transition from partially to fully convective. TOI-3235 b was first identified as a candidate from TESS photometry and confirmed with radial velocities from ESPRESSO and ground-based photometry from HATSouth, MEarth-South, TRAPPIST-South, LCOGT, and ExTrA. We find that the planet has a mass of 0.665 +/- 0.025 M-J and a radius of 1.017 +/- 0.044 R-J. It orbits close to its host star, with an orbital period of 2.5926 days but has an equilibrium temperature of approximate to 604 K, well below the expected threshold for radius inflation of hot Jupiters. The host star has a mass of 0.3939 +/- 0.0030 M-circle dot, a radius of 0.3697 +/- 0.0018 R-circle dot;, an effective temperature of 3389 K, and a J-band magnitude of 11.706 +/- 0.025. Current planet formation models do not predict the existence of gas giants such as TOI-3235 b around such low-mass stars. With a high transmission spectroscopy metric, TOI-3235 b is one of the best-suited giants orbiting M dwarfs for atmospheric characterization.

引用

页数：10

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