HIP 21539 is not a past very close neighbour of the Sun
Language
en
Article de revue
This item was published in
Astronomy and Astrophysics - A&A. 2017, vol. 601, p. L6
EDP Sciences
English Abstract
Aims. A previous study claimed that the star HIP 21539 passed close to the Sun, at a distance of 1.9 pc, around 0.14 Myr ago. We show that this is not the case.Methods. We redetermined the trajectory of the star relative ...Read more >
Aims. A previous study claimed that the star HIP 21539 passed close to the Sun, at a distance of 1.9 pc, around 0.14 Myr ago. We show that this is not the case.Methods. We redetermined the trajectory of the star relative to the Sun using a new accurate radial velocity from the HARPS spectrograph combined with the recent Gaia-TGAS astrometry. Results. With this new data, the closest approach of HIP 21539 to the Sun is now 17 pc, instead of 1.9 pc.Conclusions. At this distance, the star has not perturbed the Oort cloud.Read less <
English Keywords
Astrophysics - Solar and Stellar Astrophysics
solar neighborhood
techniques: radial velocities
catalogs
stars: kinematics and dynamics
Origin
Hal imported