TOI-257b (HD 19916b): a warm sub-saturn orbiting an evolved F-type star

被引：29

作者：

Addison, Brett C. ^{[1
]}

Wright, Duncan J. ^{[1
]}

Nicholson, Belinda A. ^{[1
,2
]}

Cale, Bryson ^{[3
]}

Mocnik, Teo ^{[4
]}

Huber, Daniel ^{[5
]}

Plavchan, Peter ^{[3
]}

Wittenmyer, Robert A. ^{[1
]}

Vanderburg, Andrew ^{[6
]}

Chaplin, William J. ^{[7
,8
]}

Chontos, Ashley ^{[5
]}

Clark, Jake T. ^{[1
]}

Eastman, Jason D. ^{[9
]}

Ziegler, Carl ^{[10
]}

Brahm, Rafael ^{[11
,12
]}

Carter, Bradley D. ^{[1
]}

Clerte, Mathieu ^{[1
]}

Espinoza, Nestor ^{[13
]}

Horner, Jonathan ^{[1
]}

Bentley, John ^{[30
]}

Jordan, Andres ^{[11
,12
]}

Kane, Stephen R. ^{[4
]}

Kielkopf, John F. ^{[15
]}

Laychock, Emilie ^{[16
]}

Mengel, Matthew W. ^{[1
]}

Okumura, Jack ^{[1
]}

Stassun, Keivan G. ^{[17
,18
]}

Bedding, Timothy R. ^{[8
,19
]}

Bowler, Brendan P. ^{[20
]}

Burnelis, Andrius ^{[28
]}

Blanco-Cuaresma, Sergi ^{[9
]}

Collins, Michaela ^{[16
]}

Crossfield, Ian ^{[21
,22
]}

Davis, Allen B. ^{[23
]}

Evensberget, Dag ^{[1
]}

Heitzmann, Alexis ^{[1
]}

Howell, Steve B. ^{[25
]}

Law, Nicholas ^{[26
]}

Mann, Andrew W. ^{[26
]}

Marsden, Stephen C. ^{[1
]}

Matson, Rachel A. ^{[24
]}

O'Connor, James H. ^{[1
]}

Shporer, Avi ^{[29
]}

Stevens, Catherine ^{[28
]}

Tinney, C. G. ^{[30
]}

Tylor, Christopher ^{[1
]}

Wang, Songhu ^{[14
]}

Zhang, Hui ^{[31
]}

Henning, Thomas ^{[32
]}

Kossakowski, Diana ^{[32
]}

机构：

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

[2] Univ Oxford, Subdept Astrophys, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England

[3] George Mason Univ, Dept Phys & Astron, 4400 Univ Dr MS 3F3, Fairfax, VA 22030 USA

[4] Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA

[5] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA

[6] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

[7] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[8] Aarhus Univ, Stellar Astrophys Ctr SAC, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark

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

[10] Univ Toronto, Dunlap Inst Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada

[11] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Av Diagonal Torres 2640, Santiago, Chile

[12] Fac Phys, Millennium Inst Astrophys, Campus San Joaquin UC,Av Vicuna Mackenna 4860, Santiago, Chile

[13] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[14] Indiana Univ, Astron Dept, 727 East 3rd St,Swain West 318, Bloomington, IN 47405 USA

[15] Univ Louisville, Dept Phys & Astron, Louisville, KY 40292 USA

[16] Kutztown State Univ, Dept Phys Sci, Kutztown, PA 19530 USA

[17] Vanderbilt Univ, Dept Phys & Astron, 6301 Stevenson Ctr Ln, Nashville, TN 37235 USA

[18] Fisk Univ, Dept Phys, 1000 18th Ave N, Nashville, TN 37208 USA

[19] Univ Sydney, Sch Phys, Sydney Inst Astron SIfA, Sydney, NSW 2006, Australia

[20] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA

[21] Univ Kansas, Dept Phys & Astron, 1251 Wescoe Hall Dr, Lawrence, KS 66045 USA

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

[23] Yale Univ, Dept Astron, New Haven, CT 06511 USA

[24] US Naval Observ, 3450 Massachusetts Ave NW, Washington, DC 20392 USA

[25] NASA, Space Sci & Astrobiol Div, Ames Res Ctr, Moffett Field, CA 94035 USA

[26] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

[27] Pontificia Univ Catolica Chile, Inst Astrofis, Av Vicuna Mackenna 4860, Santiago, Chile

[28] Westminster Coll, Dept Phys, 319 South Market St, New Wilmington, PA 16172 USA

[29] MIT, MIT Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[30] UNSW Sydney, Sch Phys, Exoplanetary Sci UNSW, Sydney, NSW 2052, Australia

[31] Nanjing Univ, Sch Astron & Space Sci, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210046, Jiangsu, Peoples R China

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

[33] MIT, Earth & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA

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

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

[36] Open Univ, Sch Phys Sci, Milton Keynes MK7 6AA, Bucks, England

[37] Lehigh Univ, Dept Phys, 16 Mem Dr East, Bethlehem, PA 18015 USA

[38] NASA, Exoplanets & Stellar Astrophys Lab, Goddard Space Flight Ctr, Mail Code 667, Greenbelt, MD 20771 USA

[39] Perth Exoplanet Survey Telescope, Perth, WA, Australia

[40] New York Univ Abu Dhabi, Ctr Space Sci, NYUAD Inst, POB 129188, Abu Dhabi, U Arab Emirates

[41] Florida Gulf Coast Univ, Dept Chem & Phys, 10501 FGCU Blvd S, Ft Myers, FL 33965 USA

[42] Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Porto, Portugal

[43] Univ Porto, Fac Ciencias, Dept Fis & Astron, Rua Campo Alegre S-N, PT-4169007 Porto, Portugal

[44] INAF Osservatorio Astrofis Catania, Via S Sofia 78, I-95123 Catania, Italy

[45] Inst Astrofis Canarias IAC, Tenerife 38205, Spain

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

[47] Univ Fed Rio Grande do Norte UFRN, Dept Fis, BR-59078970 Natal, RN, Brazil

[48] Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France

[49] Univ Paris Saclay, CEA1, CNRS, AIM,Univ Paris Diderot,Sorbonne Paris Cite, F-91191 Gif Sur Yvette, France

[50] Penn State Univ, Ctr Exoplanets & Habitable Worlds, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 502卷 / 03期

基金：

欧盟地平线“2020”; 新加坡国家研究基金会; 欧洲研究理事会; 英国科学技术设施理事会; 澳大利亚研究理事会; 美国国家科学基金会; 美国国家航空航天局;

关键词：

asteroseismology; techniques: photometric; techniques: radial velocities; techniques: spectroscopic; planetary systems; stars: individual (TIC 200723869/TOI-257); SOLAR-LIKE OSCILLATIONS; HOT JUPITER; PLANETARY SYSTEMS; MESA ISOCHRONES; SUPER-EARTHS; STELLAR; KEPLER; CANDIDATES; EVOLUTION; MASS;

D O I：

10.1093/mnras/staa3960

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of a warm sub-Saturn, TOI-257b (HD 19916b), based on data from NASA's Transiting Exoplanet Survey Satellite (TESS). The transit signal was detected by TESS and confirmed to be of planetary origin based on radial velocity observations. An analysis of the TESS photometry, the MINERVA-Australis, FEROS, and HARPS radial velocities, and the asteroseismic data of the stellar oscillations reveals that TOI-257b has a mass of M-P = 0.138 +/- 0.023M(J) (43.9 +/- 7.3 M-circle plus), a radius of R-P = 0.639 +/- 0.013 R-J (7.16 +/- 0.15 R-circle plus), bulk density of 0.65(-0.11)(+0.12) (cgs), and period 18.38818(-0.00084)(+0.00085) days. TOI-257b orbits a bright (V = 7.612 mag) somewhat evolved late F-type star with M-* = 1.390 +/- 0.046(Msun), R-* = 1.888 +/- 0.033 R-sun, T-eff = 6075 +/- 90 K, and vsin i = 11.3 +/- 0.5 kms(-1). Additionally, we find hints for a second non-transiting sub-Saturn mass planet on a similar to 71 day orbit using the radial velocity data. This system joins the ranks of a small number of exoplanet host stars (similar to 100) that have been characterized with asteroseismology. Warm sub-Saturns are rare in the known sample of exoplanets, and thus the discovery of TOI-257b is important in the context of future work studying the formation and migration history of similar planetary systems.

引用

页码：3704 / 3722

页数：19

共 19 条

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Orell-Miquel J.
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Astronomy and Astrophysics, 2024, 684
[2] Moderately misaligned orbit of the warm sub-Saturn HD 332231 b
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[3] K2-280 b - a low density warm sub-Saturn around a mildly evolved star
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MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2020, 497 (04) : 4423 - 4435
[4] HD 2685 b: a hot Jupiter orbiting an early F-type star detected by TESS
Jones, Matias, I
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ASTRONOMY & ASTROPHYSICS, 2019, 625
[5] Revisiting the warm sub-Saturn TOI-1710b: The impact of stellar activity on the mass measurement
Orell-Miquel, J.
Carleo, I.
Murgas, F.
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Palle, E.
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Masseron, T.
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ASTRONOMY & ASTROPHYSICS, 2024, 684
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ASTROPHYSICAL JOURNAL LETTERS, 2023, 949 (02)
[7] TOI-677b: A Warm Jupiter (P=11.2 days) on an Eccentric Orbit Transiting a Late F-type Star
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ASTRONOMICAL JOURNAL, 2020, 159 (04):
[8] VaTEST I: validation of sub-Saturn exoplanet TOI-181b in narrow orbit from its host star
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MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2023, 521 (01) : 1066 - 1078
[9] Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS TOI-615b, TOI-622b, and TOI-2641b
Psaridi, Angelica
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Wittenmyer, Robert A.
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ASTRONOMY & ASTROPHYSICS, 2023, 675
[10] TOI-1135 b: A young hot Saturn-size planet orbiting a solar-type star
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ASTRONOMY & ASTROPHYSICS, 2024, 685

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