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2017A&A...601L...6C - Astronomy and Astrophysics, volume 601L6-6 (2017/5-1)
HIP 21539 is not a past very close neighbour of the Sun.
CRIFO F., SOUBIRAN C., JASNIEWICZ G., KATZ D., SARTORETTI P. and PANUZZO P.
Abstract (from CDS):
Aims. A previous study claimed that the star HIP 21539 passed close to the Sun, at a distance of 1.9pc, around 0.14Myr 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 17pc, instead of 1.9pc.
Conclusions. At this distance, the star has not perturbed the Oort cloud.
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 17pc, instead of 1.9pc.
Conclusions. At this distance, the star has not perturbed the Oort cloud.
Abstract Copyright: © ESO, 2017
Journal keyword(s): solar neighborhood - techniques: radial velocities - catalogs - stars: kinematics and dynamics - stars: kinematics and dynamics
Simbad objects: 1
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