Cover Image

Teegarden’s Star revisited: a nearby planetary system with at least three planets

The two known planets in the planetary system of Teegarden’s Star are among the most Earth-like exoplanets currently known. Revisiting this nearby 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...

Full description

Saved in:
Bibliographic Details
Main Authors: Dreizler, Stefan (Author) , Luque, R. (Author) , Ribas, I. (Author) , Koseleva, V. (Author) , Ruh, H. L. (Author) , Nagel, E. (Author) , Pozuelos, F. J. (Author) , Zechmeister, M. (Author) , Reiners, A. (Author) , Caballero, J. A. (Author) , Amado, P. J. (Author) , Béjar, V. J. S. (Author) , Bean, J. L. (Author) , Brady, M. (Author) , Cifuentes, C. (Author) , Gillon, M. (Author) , Hatzes, A. P. (Author) , Henning, Thomas (Author) , Kasper, D. (Author) , Montes, D. (Author) , Morales, J. C. (Author) , Murray, C. A. (Author) , Pallé, E. (Author) , Quirrenbach, Andreas (Author) , Seifahrt, A. (Author) , Schweitzer, A. (Author) , Stürmer, Julian (Author) , Stefánsson, G. (Author) , Linares, J. I. Vico (Author)
Format: Article (Journal)
Language:English
Published: April 2024
In: Astronomy and astrophysics
Year: 2024, Volume: 684, Pages: 1-19
ISSN:1432-0746
DOI:10.1051/0004-6361/202348033
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1051/0004-6361/202348033
Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2024/04/aa48033-23/aa48033-23.html
Get full text
Author Notes:S. Dreizler, R. Luque, I. Ribas, V. Koseleva, H.L. Ruh, E. Nagel, F.J. Pozuelos, M. Zechmeister, A. Reiners, J.A. Caballero, P.J. Amado, V.J.S. Béjar, J.L. Bean, M. Brady, C. Cifuentes, M. Gillon, A.P. Hatzes, Th Henning, D. Kasper, D. Montes, J.C. Morales, C.A. Murray, E. Pallé, A. Quirrenbach, A. Seifahrt, A. Schweitzer, J. Stürmer, G. Stefánsson, and J.I. Vico Linares
Description
Summary:The two known planets in the planetary system of Teegarden’s Star are among the most Earth-like exoplanets currently known. Revisiting this nearby 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 ± 0.04 days and a minimum mass of 0.82 ± 0.17 <i>M<i/><sub>⊕<sub/>. A signal at 96 days is attributed to the stellar rotation period. The interpretation of a signal at 172 days 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 such as GJ 1002.
Item Description:Gesehen am 07.02.2025
Physical Description:Online Resource
ISSN:1432-0746
DOI:10.1051/0004-6361/202348033

Similar Items