The GAPS programme at TNG LVII. TOI-5076b: A warm sub-Neptune planet orbiting a thin-to-thick-disk transition star in a wide binary system

被引：2

作者：

Montalto, M. ^{[1
]}

Greco, N. ^{[1
,2
,3
]}

Biazzo, K. ^{[11
]}

Desidera, S. ^{[10
]}

Andreuzzi, G. ^{[11
,16
]}

Bieryla, A. ^{[23
,24
]}

Bignamini, A. ^{[15
]}

Bonomo, A. S. ^{[5
]}

Briceno, C. ^{[7
]}

Cabona, L. ^{[10
]}

Cosentino, R. ^{[16
]}

Damasso, M. ^{[5
]}

Fiorenzano, A. ^{[16
]}

Fong, W. ^{[20
,21
]}

Goeke, B. ^{[20
,21
]}

Hesse, K. M. ^{[20
,21
]}

Kostov, V. B. ^{[25
]}

Lanza, A. F. ^{[1
]}

Latham, D. W. ^{[23
]}

Law, N. ^{[8
]}

Mancini, L. ^{[4
,5
,12
,13
]}

Maggio, A. ^{[17
]}

Molinaro, M. ^{[15
]}

Mann, A. W. ^{[8
]}

Mantovan, G. ^{[14
]}

Naponiello, L. ^{[4
,5
]}

Nardiello, D. ^{[10
,14
]}

Nascimbeni, V. ^{[10
]}

Pagano, I. ^{[1
]}

Pedani, M. ^{[16
]}

Safonov, B. S. ^{[9
]}

Scandariato, G. ^{[1
]}

Seager, S. ^{[19
,20
,21
,22
]}

Singh, V. ^{[1
]}

Sozzetti, A. ^{[5
]}

Strakhov, I. A. ^{[9
]}

Winn, J. N. ^{[18
]}

Ziegler, C. ^{[6
]}

Zingales, T. ^{[10
,14
]}

机构：

[1] INAF Osservatorio Astrofis Catania, Via Santa Sofia 78, I-95123 Catania, Italy

[2] Univ Catania, Dipartimento Fis & Astron Ettore Majorana, Via S Sofia 64, I-95123 Catania, Italy

[3] Univ Catania, Scuola Super Catania, Via Valdisavoia 9, I-95123 Catania, Italy

[4] Univ Roma Tor Vergata, Dept Phys, Via Ric Sci 1, I-00133 Rome, Italy

[5] INAF Osservatorio Astrofis Torino, Via Osservatorio 20, I-10025 Pino Torinese, Italy

[6] Stephen F Austin State Univ, Dept Phys Engn & Astron, 1936 North St, Nacogdoches, TX 75962 USA

[7] Cerro Tololo Interamer Observ, Casilla 603, La Serena, Chile

[8] Univ North Carolina Chapel Hill, Dept Phys & Astron, Chapel Hill, NC 27599 USA

[9] Lomonosov Moscow State Univ, Sternberg Astron Inst, Moscow 119234, Russia

[10] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy

[11] INAF Osservatorio Astron Roma, Via Frascati 33, I-00040 Monte Porzio Catone, RM, Italy

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

[13] Int Inst Adv Sci Studies IIASS, Via G Pellegrino 19, I-84019 Vietri Sul Mare, SA, Italy

[14] Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Vicolo Osservatorio 3, I-35122 Padua, Italy

[15] INAF Osservatorio Astron Trieste, Via Tiepolo 11, I-34143 Trieste, Italy

[16] Fdn Galileo Galilei INAF, Rambla Jose Ana Fernandez Perez 7, Brena Baja 38712, TF, Spain

[17] INAF Osservatorio Astron Palermo GS Vaiana, Piazza Parlamento 1, I-90134 Palermo, Italy

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

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

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

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

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

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

[24] Univ Southern Queensland, Ctr Astrophys, West St, Toowoomba, Qld 4350, Australia

[25] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2024年 / 687卷

关键词：

techniques: photometric; techniques: radial velocities; planets and satellites: gaseous planets; binaries: visual; planets and satellites: general; planets and satellites: oceans; SPECKLE INTERFEROMETRY; ELEMENTAL ABUNDANCE; RADIUS DISTRIBUTION; GALACTIC THICK; KEPLER PLANETS; MASS; EXOPLANETS; TRENDS; EFFICIENT; SEARCH;

D O I：

10.1051/0004-6361/202349082

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. We report the confirmation of a new transiting exoplanet orbiting the star TOI-5076. Methods. We present our vetting procedure and follow-up observations which led to the confirmation of the exoplanet TOI-5076b. In particular, we employed high-precision TESS photometry, high-angular-resolution imaging from several telescopes, and high-precision radial velocities from HARPS-N. Results. From the HARPS-N spectroscopy, we determined the spectroscopic parameters of the host star: T-eff = (5070 +/- 143) K, log g = (4.6 +/- 0.3), [Fe/H] = (+0.20 +/- 0.08), and [alpha/Fe] = 0.05 +/- 0.06. The transiting planet is a warm sub-Neptune with a mass m(p) = (16 +/- 2) M-circle dot, a radius r(p) =(3.2 +/- 0.l) R-circle dot yielding a density rho(p) = (2.8 +/- 0.5) g cm(-3). It revolves around its star approximately every 23.445 days. Conclusions. The host star is a metal-rich, K2V dwarf, located at about 82 pc from the Sun with a radius of R-star = (0.78 +/- 0.01) R-circle dot and a mass of M-star = (0.80 +/- 0.07) M-circle dot. It forms a common proper motion pair with an M-dwarf companion star located at a projected separation of 2178 au. The chemical analysis of the host-star and the Galactic-space velocities indicate that TOI-5076 belongs to the old population of thin-to-thick-disk transition stars. The density of TOI-5076b suggests the presence of a large fraction by volume of volatiles overlying a massive core. We found that a circular orbit solution is marginally favored with respect to an eccentric orbit solution for TOI-5076b.

引用

页数：15

共 2 条

[1] The GAPS programme at TNG: XLIX. TOI-5398, the youngest compact multi-planet system composed of an inner sub-Neptune and an outer warm Saturn
Mantovan, G.
Malavolta, L.
Desidera, S.
Zingales, T.
Borsato, L.
Piotto, G.
Maggio, A.
Locci, D.
Polychroni, D.
Turrini, D.
Baratella, M.
Biazzo, K.
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Lissauer, J. J.
Twicken, J. D.
Lanza, A. F.
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Messina, S.
Montalto, M.
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Cheryasov, D.
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[2] The GAPS programme at TNG XL. A puffy and warm Neptune-sized planet and an outer Neptune-mass candidate orbiting the solar-type star TOI-1422
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Mancini, L.
Damasso, M.
Bonomo, A. S.
Sozzetti, A.
Nardiello, D.
Biazzo, K.
Stognone, R. G.
Lillo-Box, J.
Lanza, A. F.
Poretti, E.
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Zeng, L.
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Hebrard, G.
Basilicata, M.
Benatti, S.
Bignamini, A.
Borsa, F.
Claudi, R.
Cosentino, R.
Covino, E.
de Gurtubai, A.
Delfosse, X.
Desidera, S.
Dragomir, D.
Eastman, J. D.
Essack, Z.
Fiorenzano, A. F. M.
Giacobbe, P.
Harutyunyan, A.
Heidari, N.
Hellier, C.
Jenkins, J. M.
Knapic, C.
Konig, P-C
Latham, D. W.
Magazzu, A.
Maggio, A.
Maldonado, J.
Micela, G.
Molinari, E.
Molinaro, M.
Morgan, E. H.
Moutou, C.
Nascimbeni, V
Pace, E.
Pagano, I
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ASTRONOMY & ASTROPHYSICS, 2022, 667

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