Article (Scientific journals)
A long-period transiting substellar companion in the super-Jupiters to brown dwarfs mass regime and a prototypical warm-Jupiter detected by TESS
Jones, Matías I.; Reinarz, Yared; Brahm, Rafael et al.
2024In Astronomy and Astrophysics, 683, p. 192
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Keywords :
Space and Planetary Science; Astronomy and Astrophysics
Abstract :
[en] We report on the confirmation and follow-up characterization of two long-period transiting substellar companions on low-eccentricity orbits around TIC 4672985 and TOI-2529, whose transit events were detected by the TESS space mission. Ground-based photometric and spectroscopic follow-up from different facilities, confirmed the substellar nature of TIC 4672985 b, a massive gas giant in the transition between the super-Jupiters and brown dwarfs mass regime. From the joint analysis we derived the following orbital parameters: P = 69.0480−0.0005+0.0004 d, Mp = 12.74−1.01+1.01 Mj, Rp = 1.026−0.067+0.065 Rj and e = 0.018−0.004+0.004. In addition, the RV time series revealed a significant trend at the ~350 m s−1 yr−1 level, which is indicative of the presence of a massive outer companion in the system. TIC 4672985 b is a unique example of a transiting substellar companion with a mass above the deuterium-burning limit, located beyond 0.1 AU and in a nearly circular orbit. These planetary properties are difficult to reproduce from canonical planet formation and evolution models. For TOI-2529 b, we obtained the following orbital parameters: P = 64.5949−0.0003+0.0003 d, Mp = 2.340−0.195+0.197 Mj, Rp = 1.030−0.050+0.050 Rj and e = 0.021−0.015+0.024, making this object a new example of a growing population of transiting warm giant planets.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Jones, Matías I.
Reinarz, Yared 
Brahm, Rafael
Tala Pinto, Marcelo
Eberhardt, Jan
Rojas, Felipe 
Triaud, Amaury H. M. J.
Gupta, Arvind F.
Ziegler, Carl
Hobson, Melissa J.
Jordán, Andrés
Henning, Thomas
Trifonov, Trifon
Schlecker, Martin
Espinoza, Néstor
Torres-Miranda, Pascal 
Sarkis, Paula
Ulmer-Moll, Solène 
Lendl, Monika
Uzundag, Murat 
Moyano, Maximiliano
Hesse, Katharine 
Caldwell, Douglas A. 
Shporer, Avi
Lund, Michael B.
Jenkins, Jon M.
Seager, Sara
Winn, Joshua N.
Ricker, George R.
Burke, Christopher J.
Figueira, Pedro
Psaridi, Angelica 
Al Moulla, Khaled 
Mounzer, Dany 
Standing, Matthew R. 
Martin, David V.
Dransfield, Georgina
Baycroft, Thomas 
Dragomir, Diana
Boyle, Gavin 
Suc, Vincent
Mann, Andrew W.
Timmermans, Mathilde  ;  Université de Liège - ULiège > Astrobiology
Ducrot, Elsa
Hooton, Matthew J.
Zúñiga Fernández, Sebastián Gaspar  ;  Université de Liège - ULiège > Astrobiology
Sebastian, Daniel
Gillon, Michaël  ;  Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO)
Queloz, Didier
Carson, Joe
Lissauer, Jack J. 
More authors (41 more) Less
Language :
English
Title :
A long-period transiting substellar companion in the super-Jupiters to brown dwarfs mass regime and a prototypical warm-Jupiter detected by TESS
Publication date :
March 2024
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences
Volume :
683
Pages :
A192
Peer reviewed :
Peer Reviewed verified by ORBi
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since 07 May 2024

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