elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]
Tell a friend Print

The TOI-763 system: sub-Neptunes orbiting a Sun-like star

Fridlund, M. and Livingston, J. and Gandolfi, D. and Persson, C.M. and Lam, K.W.F. and Stassun, K.G. and Hellier, C. and Korth, J. and Hatzes, A.P. and Malavolta, L. and Luque, R. and Redfield, S. and Guenther, E.W. and Albrecht, S. and Barragán, O. and Benatti, S. and Bouma, L. and Cabrera, J. and Cochran, W.D. and Csizmadia, S. and Dai, F. and Deeg, H.J. and Esposito, M. and Georgieva, I. and Grziwa, S. and González Cuesta, L. and Hirano, T. and Jenkins, J.M. and Kabath, P. and Knudstrup, E. and Latham, D.W. and Mathur, S. and Mullally, S.E. and Narita, N. and Nowak, G. and Olofsson, A.O.H. and Palle, E. and Patzold, M. and Pompei, E. and Rauer, H. and Ricker, G. and Rodler, F. and Seager, S. and Serrano, L.M. and Smith, A.M.S. and Spina, L. and Subjak, J. and Tenenbaum, P. and Ting, E.B. and Vanderburg, A. and Vanderspek, R. and Van Eylen, V. and Villanueva, S. and Winn, J.N. (2020) The TOI-763 system: sub-Neptunes orbiting a Sun-like star. Monthly Notices of the Royal Astronomical Society, 498 (3), pp. 4503-4517. Oxford University Press. doi: 10.1093/mnras/staa2502. ISSN 0035-8711.

[img] PDF - Published version
2MB

Official URL: https://academic.oup.com/mnras/article/498/3/4503/5894401

Abstract

We report the discovery of a planetary system orbiting TOI-763(aka CD-39 7945), a V = 10.2, high proper motion G-type dwarf star that was photometrically monitored by the TESS space mission in Sector 10. We obtain and model the stellar spectrum and find an object slightly smaller than the Sun, and somewhat older, but with a similar metallicity. Two planet candidates were found in the light curve to be transiting the star. Combining TESS transit photometry with HARPS high-precision radial velocity (RV) follow-up measurements confirm the planetary nature of these transit signals. We determine masses, radii, and bulk densities of these two planets. A third planet candidate was discovered serendipitously in the RV data. The inner transiting planet, TOI-763 b, has an orbital period of Pb = 5.6 d, a mass of Mb = 9.8 ± 0.8 M⊕, and a radius of Rb = 2.37 ± 0.10 R⊕. The second transiting planet, TOI-763 c, has an orbital period of Pc = 12.3 d, a mass of Mc = 9.3 ± 1.0 M⊕, and a radius of Rc = 2.87 ± 0.11 R⊕. We find the outermost planet candidate to orbit the star with a period of ∼48 d. If confirmed as a planet, it would have a minimum mass of Md = 9.5 ± 1.6 M⊕. We investigated the TESS light curve in order to search for a mono transit by planet d without success. We discuss the importance and implications of this planetary system in terms of the geometrical arrangements of planets orbiting G-type stars.

Item URL in elib:https://elib.dlr.de/137497/
Document Type:Article
Title:The TOI-763 system: sub-Neptunes orbiting a Sun-like star
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Fridlund, M.Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92, Onsala, Sweden; Leiden Observatory, Leiden University, 2333CA, Leiden, The NetherlandsUNSPECIFIEDUNSPECIFIED
Livingston, J.Department of Astronomy, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo 113-0033, JapanUNSPECIFIEDUNSPECIFIED
Gandolfi, D.Dipartimento di Fisica, Universita di Torino, via P. Giuria 1, I-10125 Torino, ItalyUNSPECIFIEDUNSPECIFIED
Persson, C.M.Department of Space, Earth and Environment, Chalmers University ofTechnology, Onsala Space Observatory, SE-439 92 Onsala, SwedenUNSPECIFIEDUNSPECIFIED
Lam, K.W.F.Center for Astronomy and Astrophysics, Technical University Berlin, Hardenbergstr. 36, D-10623 Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Stassun, K.G.Physics and Astronomy Department, Vanderbilt University, Nashville, TN37235, USAUNSPECIFIEDUNSPECIFIED
Hellier, C.Astrophysics Group, Keele University, Staffordshire ST5 5BG, UKUNSPECIFIEDUNSPECIFIED
Korth, J.Rheinisches Institut fuer Umweltforschung an der Universitaet zu Koeln, Aachener Strasse 209, 50931 Koeln, GermanyUNSPECIFIEDUNSPECIFIED
Hatzes, A.P.Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778, Tautenburg, GermanyUNSPECIFIEDUNSPECIFIED
Malavolta, L.INAF, Osservatorio Astronomico di Padova, Padova, ItalyUNSPECIFIEDUNSPECIFIED
Luque, R.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain );; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIEDUNSPECIFIED
Redfield, S.Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USAUNSPECIFIEDUNSPECIFIED
Guenther, E.W.Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778, Tautenburg, GermanyUNSPECIFIEDUNSPECIFIED
Albrecht, S.Stellar Astrophysics Centre, Deparment of Physics and Astronomy, Aarhus University, Ny Munkegrade 120, 8000 Aarhus C, DenmarkUNSPECIFIEDUNSPECIFIED
Barragán, O.Sub-department of Astrophysics, Department of Physics, Universityof Oxford, Oxford OX1 3RH, UKUNSPECIFIEDUNSPECIFIED
Benatti, S.INAF - Osservatorio Astronomico di Padova, Vcolo dell'Osservatorio 5, 35122-Padova, ItalyUNSPECIFIEDUNSPECIFIED
Bouma, L.Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane,Princeton, NJ 08544, USAUNSPECIFIEDUNSPECIFIED
Cabrera, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cochran, W.D.Department of Astronomy and McDonald Observatory, University of Texasat Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USAUNSPECIFIEDUNSPECIFIED
Csizmadia, S.Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489 Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Dai, F.Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute ofTechnology, Cambridge, MA 02139, USAUNSPECIFIEDUNSPECIFIED
Deeg, H.J.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIEDUNSPECIFIED
Esposito, M.Thuringer Landessternwarte Tautenburg, Sternwarte 5, 07778, Tautenburg, Germany );UNSPECIFIEDUNSPECIFIED
Georgieva, I.Department of Space, Earth and Environment, Onsala Space Observatory, Chalmers University of Technology, SE-439 92, Onsala, SwedenUNSPECIFIEDUNSPECIFIED
Grziwa, S.Rheinisches Institut fuer Umweltforschung an der Universitaet zu Koeln, Aachener Strasse 209, 50931 Koeln, GermanyUNSPECIFIEDUNSPECIFIED
González Cuesta, L.Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna,SpainUNSPECIFIEDUNSPECIFIED
Hirano, T.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, JapanUNSPECIFIEDUNSPECIFIED
Jenkins, J.M.NASA Ames Research Center, Moffet Field, CA 94035, USAUNSPECIFIEDUNSPECIFIED
Kabath, P.Astronomical Institute ASCR, Fricova 298, 25165 Ondrejov, Czech RepublicUNSPECIFIEDUNSPECIFIED
Knudstrup, E.Stellar Astrophysics Centre, Deparment of Physics and Astronomy, Aarhus University, Ny Munkegrade 120, 8000 Aarhus C, DenmarkUNSPECIFIEDUNSPECIFIED
Latham, D.W.Center for Astrophysics|Harvard & Smithsonian, 60 Garden Street,Cambridge, MA 02138, USAUNSPECIFIEDUNSPECIFIED
Mathur, S.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIEDUNSPECIFIED
Mullally, S.E.Department of Aeronautics and Astronautics, MIT, 77 MassachusettsAvenue, Cambridge, MA 02139, USAUNSPECIFIEDUNSPECIFIED
Narita, N.Department of Astronomy, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo 113-0033, JapanUNSPECIFIEDUNSPECIFIED
Nowak, G.Instituto de Astrofisica de Canarias (IAC), Via Lactea s/n 38200, La Laguna, SpainUNSPECIFIEDUNSPECIFIED
Olofsson, A.O.H.Department of Space, Earth and Environment, Chalmers University ofTechnology, Onsala Space Observatory, SE-439 92 Onsala, SwedenUNSPECIFIEDUNSPECIFIED
Palle, E.Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain | Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, SpainUNSPECIFIEDUNSPECIFIED
Patzold, M.Rheinisches Institut fuer Umweltforschung an der Universitaet zu Koeln, Aachener Strasse 209, 50931 Koeln, GermanyUNSPECIFIEDUNSPECIFIED
Pompei, E.European Southern Observatory, Casilla, Santiago, ChileUNSPECIFIEDUNSPECIFIED
Rauer, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ricker, G.Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA, 02139, USAUNSPECIFIEDUNSPECIFIED
Rodler, F.Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USAUNSPECIFIEDUNSPECIFIED
Seager, S.NSF Graduate Research Fellow, Steward Observatory, University of Arizona, Tucson, AZ, 85721, USA; Department of Earth, Atmospheric and Planetary Sciences, MIT, Cambridge, MA, 02139, USA; Department of Aeronautics and Astronautics, MIT, Cambridge, MA, 0213UNSPECIFIEDUNSPECIFIED
Serrano, L.M.Dipartimento di Fisica, Universita di Torino, via P. Giuria 1, I-10125 Torino, ItalyUNSPECIFIEDUNSPECIFIED
Smith, A.M.S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Spina, L.Monash Centre for Astrophysics, School of Physics and Astronomy,Monash University, VIC 3800, AustraliaUNSPECIFIEDUNSPECIFIED
Subjak, J.Astronomical Institute, Czech Academy of Sciences, Fricova 298, 25165, Ondrejov, Czech Republic; Astronomical Institute, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 2027/3, 12116, Prague, Czech RepublicUNSPECIFIEDUNSPECIFIED
Tenenbaum, P.SETI Institute/NASA Ames Research Center, Moffet Field, CA 94035, USAUNSPECIFIEDUNSPECIFIED
Ting, E.B.NASA Ames Research Center, Moffet Field, CA 94035, USAUNSPECIFIEDUNSPECIFIED
Vanderburg, A.Department of Astronomy, University of Wisconsin-Madison, Madison, WI53706, USAUNSPECIFIEDUNSPECIFIED
Vanderspek, R.Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA, 02139, USAUNSPECIFIEDUNSPECIFIED
Van Eylen, V.Mullard Space Science Laboratory, University College London, HolmburySt Mary, Dorking, Surrey RH5 6NT, UKUNSPECIFIEDUNSPECIFIED
Villanueva, S.Department of Physics and Kavli Institute for Astrophysics and SpaceResearch, Massachusetts Institute of Technology, Cambridge, MA 02139,USAUNSPECIFIEDUNSPECIFIED
Winn, J.N.Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane,Princeton, NJ 08544, USAUNSPECIFIEDUNSPECIFIED
Date:August 2020
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:498
DOI:10.1093/mnras/staa2502
Page Range:pp. 4503-4517
Publisher:Oxford University Press
ISSN:0035-8711
Status:Published
Keywords:planets and satellites: detection, planets and satellites: individual: TOI-763, planets and satellites: individual: TIC 178819686, Astrophysics - Earth and Planetary Astrophysics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project PLATO (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Csizmadia, Szilard
Deposited On:16 Nov 2020 12:22
Last Modified:16 Nov 2020 12:22

Repository Staff Only: item control page
Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.