The CARMENES search for exoplanets around M dwarfs A long-period planet around GJ 1151 measured with CARMENES and HARPS-N data

被引：16

作者：

Blanco-Pozo, J. ^{[1
,2
]}

Perger, M. ^{[1
,2
]}

Damasso, M. ^{[3
]}

Escude, G. Anglada ^{[1
,2
]}

Ribas, I. ^{[1
,2
]}

Baroch, D. ^{[1
,2
]}

Caballero, J. A. ^{[4
]}

Cifuentes, C. ^{[4
]}

Jeffers, S. V. ^{[5
]}

Lafarga, M. ^{[1
,2
,6
]}

Kaminski, A. ^{[7
]}

Kaur, S. ^{[1
,2
]}

Nagel, E. ^{[8
,9
,10
]}

Perdelwitz, V. ^{[11
]}

Perez-Torres, M. ^{[12
,13
]}

Sozzetti, A. ^{[3
]}

Vigano, D. ^{[1
,2
]}

Amado, P. J.

Andreuzzi, G. ^{[14
,15
]}

Bejar, V. J. S. ^{[16
,17
]}

Brown, E. L. ^{[18
]}

Del Sordo, F. ^{[1
,2
,19
]}

Dreizler, S. ^{[8
]}

Galadi-Enriquez, D. ^{[20
]}

Hatzes, A. P. ^{[10
]}

Kuerster, M. ^{[21
]}

Lanza, A. F. ^{[19
]}

Melis, A. ^{[22
]}

Molinari, E. ^{[22
]}

Montes, D. ^{[23
,24
]}

Murgia, M. ^{[22
]}

Palle, E. ^{[16
,17
]}

Pena-Monino, L.

Perrodin, D. ^{[22
]}

Pilia, M. ^{[22
]}

Poretti, E.

Quirrenbach, A. ^{[9
]}

Reiners, A. ^{[8
]}

Schweitzer, A. ^{[10
]}

Osorio, M. R. Zapatero ^{[25
]}

Zechmeister, M. ^{[8
]}

机构：

[1] CSIC, Inst Ciencies Espai ICE, Campus UAB,Carrer Can Magrans S-N, Bellaterra 08193, Spain

[2] Inst Estudis Espacials Catalunya IEEC, C Gran Capita 2-4, Barcelona 08034, Spain

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

[4] CSIC, INTA, Ctr Astrobiol CAB, ESAC Campus,Camino Bajo Castillo S-N, Villanueva De La Canada 28692, Madrid, Spain

[5] Max Planck Inst Sonnensyst Forsch MPS, Justus von Liebig Weg 3, D-37077 Gottingen, Germany

[6] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, England

[7] Heidelberg Univ, Zentrum Astron, Landessternwarte, Konigstuhl 12, D-69117 Heidelberg, Germany

[8] Georg August Univ Gottingen, Inst Astrophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany

[9] Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany

[10] Thuringen Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany

[11] Weizmann Inst Sci, Dept Earth & Planetary Sci, Herzl St 234, IL-7610001 Rehovot, Israel

[12] CSIC, Inst Astrofis Andalucia IAA, Glorieta Astron S-N, Granada 18008, Spain

[13] European Univ Cyprus, Sch Sci, Diogenes St, CY-1516 Nicosia, Cyprus

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

[15] INAF Osservatorio Astron Roma, Via Frascati 33, I-00078 Monte Porzio Catone, Italy

[16] Inst Astrofis Canarias IAC, C Via Lactea, San Cristobal la Laguna 38205, Tenerife, Spain

[17] Univ La Laguna ULL, Dept Astrofis, San Cristobal la Laguna 38206, Tenerife, Spain

[18] Ctr Astrophys, 499-565 West St, Toowoomba, Qld 4350, Australia

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

[20] Observ Calar Alto, Ctr Astron Hispano Andalucia CAHA, Gergal 04550, Spain

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

[22] INAF Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, Italy

[23] Univ Complutense Madrid, Fac Ciencias Fis, Dept Fis Tierra & Astrofis, Pl Ciencias 1, Madrid 28040, Spain

[24] Univ Complutense Madrid, Fac Ciencias Fis, IPARCOS UCM Inst Fis Particulas & Cosmos, Pl Ciencias 1, Madrid 28040, Spain

[25] CSIC, INTA, Ctr Astrobiol CAB, Carretera Ajalvir Km 4, Torrejon De Ardoz, Madrid, Spain

来源：

ASTRONOMY & ASTROPHYSICS | 2023年 / 671卷

基金：

欧洲研究理事会;

关键词：

stars: late-type; stars: individual: GJ 1151; techniques: radial velocities; planets and satellites: detection; stars: activity; TRANSMISSION SPECTRUM; RADIO-EMISSION; INPUT CATALOG; STAR; COMPANION; ROTATION; NEPTUNE; PROGRAM; FLUXES; LOFAR;

D O I：

10.1051/0004-6361/202245053

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. Detecting a planetary companion in a short-period orbit through radio emission from the interaction with its host star is a new prospect in exoplanet science. Recently, a tantalising signal was found close to the low-mass stellar system GJ 1151 using LOFAR observations.Aims. We studied spectroscopic time-series data of GJ 1151 in order to search for planetary companions, investigate possible signatures of stellar magnetic activity, and to find possible explanations for the radio signal.Methods. We used the combined radial velocities measured from spectra acquired with the CARMENES, HARPS-N, and HPF instruments, extracted activity indices from those spectra in order to mitigate the impact of stellar magnetic activity on the data, and performed a detailed analysis of Gaia astrometry and all available photometric time series coming from the MEarth and ASAS-SN surveys.Results. We found a M > 10.6 M-circle plus companion to GJ 1151 in a 390d orbit at a separation of 0.57 au. Evidence for a second modulation is also present; this could be due to long-term magnetic variability or a second (substellar) companion. The star shows episodes of elevated magnetic activity, one of which could be linked to the observed LOFAR radio emission. We show that it is highly unlikely that the detected GJ 1151 c, or any additional outer companion is the source of the detected signal. We cannot firmly rule out the suggested explanation of an undetected short-period planet that could be related to the radio emission, as we establish an upper limit of 1.2 M-circle plus for the minimum mass.

引用

页数：17

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