J/A+A/684/A117 RVs of Teegarden's star (Dreizler+, 2024)
Teegarden's star revisited.
A nearby planetary system with at least three planets.
Dreizler S., Luque R., Ribas I., Koseleva V., Ruh L.H., Nagel E.,
Pozuelos J.F., Zechmeister M., Reiners A., Caballero A.J., Amado J.P.,
Bejar S.V.J., Bean L.J., Brady M., Cifuentes C., Gillon M., Hatzes P.A.,
Henning T., Kasper D., Montes D., Morales C.J., Murray C.A., Palle E.,
Quirrenbach A., Seifahrt A., Schweitzer A., Stuermer J., Stefansson G.,
Vico Linares I.J.
<Astron. Astrophys. 684, A117 (2024)>
=2024A&A...684A.117D 2024A&A...684A.117D (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Radial velocities
Keywords: methods: data analysis -
planets and satellites: individual: Teegarden's Star bc -
stars: individual: Teegarden's Star - stars: low-mass
Abstract:
The two known planets in the planetary system of Teegarden's Star are
among the most Earth-like exoplanets currently known. Revisiting this
near-by planetary system with two planets in the habitable zone aims
at a more complete census of planets around very low-mass stars. A
significant number of new radial velocity measurements from CARMENES,
ESPRESSO, MAROON-X, and HPF, as well as photometry from TESS motivated
a deeper search for additional planets. We confirm and refine the
orbital parameters of the two know planets Teegarden's Star b and c.
We also report the detection of a third planet d with an orbital
period of 26.13±0.04d and a minimum mass of 0.82±0.17M☉. A
signal at 96d is attributed to the stellar rotation period. The
interpretation of a signal at 172d remains open. The TESS data exclude
transiting short-period planets down to about half an Earth radius. We
compare the planetary system architecture of very low-mass stars. In
the currently known configuration, the planetary system of Teegarden's
star is dynamically quite different from that of TRAPPIST-1, which is
more compact, but dynamically similar to others like GJ1002.
Description:
Radial velocity measurements of Teegarden's Star: RV measurements were
obtained with four different instruments, CARMENES (Visual arm),
ESPRESSO, Maroon-X and HPF. A short description of the instruments and
data reduction is presented in Sect. 2.1 in the paper.
Objects:
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RA (2000) DE Designation(s)
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02 53 00.89 +16 52 52.6 Teegarden's Star = TIC 257870150
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 42 467 Radial velocity measurements of Teegarden's star
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Inst Instrument (1)
13- 27 F15.7 d BJD Date (BJD)
29- 35 F7.3 m/s RV Radial velocity
37- 42 F6.3 m/s e_RV Radial velocity error
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Note (1): Instruments are CARM_VIS, ESPRESSO, HPF, MAROON-X_b1, MAROON-X_b2,
MAROON-X_b3, MAROON-X_r1, MAROON-X_r2 and MAROON-X_r3.
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Acknowledgements:
Stefan Dreizler, sdreizl(at)gwdg.de
(End) Patricia Vannier [CDS] 04-Mar-2024