Reference : The CARMENES search for exoplanets around M dwarfs. Two planets on opposite sides of ...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/248887
The CARMENES search for exoplanets around M dwarfs. Two planets on opposite sides of the radius gap transiting the nearby M dwarf LTT 3780
English
Nowak, G. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain ; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Luque, R. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Parviainen, H. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Pallé, E. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Molaverdikhani, K. [Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany]
Béjar, V. J. S. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Lillo-Box, J. [Centro de Astrobiología (CSIC-INTA), ESAC, Camino bajo del castillo s/n, 28692, Villanueva de la Cañada, Madrid, Spain]
Rodríguez-López, C. [Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, 18008, Granada, Spain]
Caballero, J. A. [Centro de Astrobiología (CSIC-INTA), ESAC, Camino bajo del castillo s/n, 28692, Villanueva de la Cañada, Madrid, Spain]
Zechmeister, M. [Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany]
Passegger, V. M. [Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440 West Brooks Street, Norman, OK, 73019, USA; Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029, Hamburg, Germany]
Cifuentes, C. [Centro de Astrobiología (CSIC-INTA), ESAC, Camino bajo del castillo s/n, 28692, Villanueva de la Cañada, Madrid, Spain]
Schweitzer, A. [Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029, Hamburg, Germany]
Narita, N. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; JST, PRESTO, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan]
Cale, B. [Department of Physics and Astronomy, George Mason University, 4400 University Drive MS 3F3, Fairfax, VA, 22030, USA]
Espinoza, N. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21218, USA]
Murgas, F. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Hidalgo, D. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Zapatero Osorio, M. R. [Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir km 4, 28850 Torrejón de Ardoz, Madrid, Spain]
Pozuelos Romero, Francisco José mailto [Space Sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, 19C Allée du 6 Août, 4000, Liège, Belgium; Astrobiology Research Unit, Université de Liège, 19C Allée du 6 Août, 4000, Liège, Belgium]
Aceituno, F. J. [Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, 18008, Granada, Spain]
Amado, P. J. [Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, 18008, Granada, Spain]
Barkaoui, Khalid [Université de Liège - ULiège > > Astrobiology >]
Barrado, D. [Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir km 4, 28850 Torrejón de Ardoz, Madrid, Spain]
Bauer, F. F. [Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, 18008, Granada, Spain]
Benkhaldoun, Z. [Oukaimeden Observatory, High Energy Physics and Astrophysics Laboratory, Cadi Ayyad University, Marrakech, Morocco]
Caldwell, D. A. [SETI Institute, Mountain View, CA, 94043, USA; NASA Ames Research Center, Moffett Field, CA, 94035, USA]
Casasayas Barris, N. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Chaturvedi, P. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, 0777, Tautenburg, Germany]
Chen, G. [Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210008, PR China]
Collins, K. A. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, 02138, USA]
Collins, K. I. [Department of Physics and Astronomy, George Mason University, 4400 University Drive MS 3F3, Fairfax, VA, 22030, USA]
Cortés-Contreras, M. [Centro de Astrobiología (CSIC-INTA), ESAC, Camino bajo del castillo s/n, 28692, Villanueva de la Cañada, Madrid, Spain]
Crossfield, I. J. M. [Department of Physics and Astronomy, University of Kansas, Lawrence, KS, USA]
de León, J. P. [Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan]
Díez Alonso, E. [Instituto Universitario de Ciencias y Tecnologías del Espacio de Asturias (ICTEA), C/ Independencia, 13, 33004, Oviedo, Spain]
Dreizler, S. [Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany]
El Mufti, M. [Department of Physics and Astronomy, George Mason University, 4400 University Drive MS 3F3, Fairfax, VA, 22030, USA]
Esparza-Borges, E. [Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Essack, Z. [Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA; Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA]
Fukui, A. [Department of Earth and Planetary Science, The University of Tokyo, Tokyo, Japan]
Gaidos, E. [Department of Earth Sciences, University of Hawai'i at Manoa, Honolulu, HI, 96822, USA]
Gillon, Michaël mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Gonzales, E. J. [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA, 95064, USA;]
Guerra, P. [Observatori Astronómic Albanyá, Camí de Bassegoda S/N, Albanyá, 17733, Girona, Spain]
Hatzes, A. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, 0777, Tautenburg, Germany]
Henning, Th [Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany]
Herrero, E. [Institut d'Estudis Espacials de Catalunya (IEEC), C/ Gran Capità 2-4, 08034, Barcelona, Spain]
Hesse, K. [Department of Astronomy, Wesleyan University, Middletown, CT, 06459, USA]
Hirano, T. [Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan]
Howell, S. B. [NASA Ames Research Center, Moffett Field, CA, 94035, USA]
Jeffers, S. V. [Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany]
Jehin, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Jenkins, J. M. [NASA Ames Research Center, Moffett Field, CA, 94035, USA]
Kaminski, A. [Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117, Heidelberg, Germany]
Kemmer, J. [Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117, Heidelberg, Germany]
Kielkopf, J. F. [Department of Physics and Astronomy, University of Louisville, Louisville, KY, 40292, USA]
Kossakowski, D. [Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany]
Kotani, T. [Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan]
Kürster, M. [Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany]
Lafarga, M. [Institut de Ciències de l'Espai (ICE, CSIC), Campus UAB, C/Can Magrans s/n, 08193, Bellaterra, Spain; Institut d'Estudis Espacials de Catalunya (IEEC), C/ Gran Capità 2-4, 08034, Barcelona, Spain]
Latham, D. W. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, 02138, USA]
Law, N. [Department of Physics and Astronomy, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3255, USA]
Lissauer, J. J. [NASA Ames Research Center, Moffett Field, CA, 94035, USA]
Lodieu, N. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Madrigal-Aguado, A. [Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Mann, A. W. [Department of Physics and Astronomy, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3255, USA]
Massey, B. [Villa '39 Observatory, Landers, CA, 92285, USA]
Matson, R. A. [US Naval Observatory, Washington, DC, 20392, USA]
Matthews, E. [Department of Physics, and Kavli Institute for Astrophysics and Space Science, M.I.T., Cambridge, MA, 02193, USA]
Montañés-Rodríguez, P. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Montes, D. [Departamento de Física de la Tierra y Astrofísica & IPARCOS-UCM (Instituto de Física de Partículas y del Cosmos de la UCM), Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040, Madrid, Spain]
Morales, J. C. [Institut de Ciències de l'Espai (ICE, CSIC), Campus UAB, C/Can Magrans s/n, 08193, Bellaterra, Spain; Institut d'Estudis Espacials de Catalunya (IEEC), C/ Gran Capità 2-4, 08034, Barcelona, Spain]
Mori, M. [Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan]
Nagel, E. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, 0777, Tautenburg, Germany]
Oshagh, M. [Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany; Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Pedraz, S. [Centro Astronómico Hispano-Alemán (CSIC-MPG), Observatorio Astronómico de Calar Alto, Sierra de los Filabres-04550 Gérgal, Almería, Spain]
Plavchan, P. [Department of Physics and Astronomy, George Mason University, 4400 University Drive MS 3F3, Fairfax, VA, 22030, USA]
Pollacco, D. [Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK]
Quirrenbach, A. [Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117, Heidelberg, Germany]
Reffert, S. [Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117, Heidelberg, Germany]
Reiners, A. [Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany]
Ribas, I. [Institut de Ciències de l'Espai (ICE, CSIC), Campus UAB, C/Can Magrans s/n, 08193, Bellaterra, Spain; Institut d'Estudis Espacials de Catalunya (IEEC), C/ Gran Capità 2-4, 08034, Barcelona, Spain]
Ricker, G. R. [Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA]
Rose, M. E. [NASA Ames Research Center, Moffett Field, CA, 94035, USA]
Schlecker, M. [Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany]
Schlieder, J. E. [Exoplanets and Stellar Astrophysics Laboratory, Code 667, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA]
Seager, S. [Department of Physics, and Kavli Institute for Astrophysics and Space Science, M.I.T., Cambridge, MA, 02193, USA; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA; Department of Aeronautics and Astronautics, MIT, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA]
Stangret, M. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Stock, S. [Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117, Heidelberg, Germany]
Tamura, M. [Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan; Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan]
Tanner, A. [Mississippi State University, 355 Lee Boulevard, Mississippi State, MS, 39762, USA]
Teske, J. [Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA, 91101, USA]
Trifonov, T. [Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany]
Twicken, J. D. [SETI Institute, Mountain View, CA, 94043, USA; NASA Ames Research Center, Moffett Field, CA, 94035, USA]
Vanderspek, R. [Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA]
Watanabe, D. [Planetary Discoveries in Fredericksburg, Fredericksburg, Virginia, 22401, USA]
Wittrock, J. [Department of Physics and Astronomy, George Mason University, 4400 University Drive MS 3F3, Fairfax, VA, 22030, USA]
Ziegler, C. [Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario, M5S 3H4, Canada]
Zohrabi, F. [Mississippi State University, 355 Lee Boulevard, Mississippi State, MS, 39762, USA)]
1-Oct-2020
Astronomy and Astrophysics
EDP Sciences
642
A173
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] techniques: photometric ; techniques: radial velocities ; stars: individual: LTT 3780 ; stars: late-type ; planets and satellites: detection
[en] We present the discovery and characterisation of two transiting planets observed by the Transiting Exoplanet Survey Satellite (TESS) orbiting the nearby (d[SUB]⋆[/SUB] ≈ 22 pc), bright (J ≈ 9 mag) M3.5 dwarf LTT 3780 (TOI-732). We confirm both planets and their association with LTT 3780 via ground-based photometry and determine their masses using precise radial velocities measured with the CARMENES spectrograph. Precise stellar parameters determined from CARMENES high-resolution spectra confirm that LTT 3780 is a mid-M dwarf with an effective temperature of T[SUB]eff[/SUB] = 3360 ± 51 K, a surface gravity of log g[SUB]⋆[/SUB] = 4.81 ± 0.04 (cgs), and an iron abundance of [Fe/H] = 0.09 ± 0.16 dex, with an inferred mass of M[SUB]⋆[/SUB] = 0.379 ± 0.016M[SUB]☉[/SUB] and a radius of R[SUB]⋆[/SUB] = 0.382 ± 0.012R[SUB]☉[/SUB]. The ultra-short-period planet LTT 3780 b (P[SUB]b[/SUB] = 0.77 d) with a radius of 1.35[SUB]-0.06[/SUB][SUP]+0.06[/SUP] R[SUB]⊕[/SUB], a mass of 2.34[SUP]-0.23[/SUP][SUB]+0.24[/SUB] M[SUB]⊕[/SUB], and a bulk density of 5.24[SUB]-0.81[/SUB][SUP]+0.94[/SUP] g cm[SUP]-3[/SUP] joins the population of Earth-size planets with rocky, terrestrial composition. The outer planet, LTT 3780 c, with an orbital period of 12.25 d, radius of 2.42[SUB]-0.10[/SUB][SUP]+0.10[/SUP] R[SUB]⊕[/SUB], mass of 6.29[SUB]-0.61[/SUB][SUP]+0.63[/SUP] M[SUB]⊕[/SUB], and mean density of 2.45[SUB]-0.37[/SUB][SUP]+0.44[/SUP] g cm[SUP]-3[/SUP] belongs to the population of dense sub-Neptunes. With the two planets located on opposite sides of the radius gap, this planetary system is anexcellent target for testing planetary formation, evolution, and atmospheric models. In particular, LTT 3780 c is an ideal object for atmospheric studies with the James Webb Space Telescope (JWST).
Professionals
http://hdl.handle.net/2268/248887
also: http://hdl.handle.net/2268/252000
10.1051/0004-6361/202037867
https://ui.adsabs.harvard.edu/abs/2020A&A...642A.173N

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