arXiv
Open Access
2020
The Y dwarf population with HST: unlocking the secrets of our coolest neighbours -- I. Overview & First astrometric results
Clemence Fontanive
Luigi R. Bedin
Daniella C. Bardalez Gagliuffi
Abstrak
In this paper we present our project that aims at determining accurate distances and proper motions for the Y brown dwarf population using the Hubble Space Telescope. We validate the program with our first results, using a single new epoch of observations of the Y0pec dwarf WISE J163940.83$-$684738.6. These new data allowed us to refine its proper motion and improve the accuracy of its parallax by a factor of three compared to previous determinations, now constrained to $\varpi = 211.11 \pm 0.56$ mas. This newly derived absolute parallax corresponds to a distance of $4.737 \pm 0.013$ pc, an exquisite and unprecedented precision for faint ultracool Y dwarfs.
Topik & Kata Kunci
Penulis (3)
C
Clemence Fontanive
L
Luigi R. Bedin
D
Daniella C. Bardalez Gagliuffi
Akses Cepat
Informasi Jurnal
- Tahun Terbit
- 2020
- Bahasa
- en
- Sumber Database
- arXiv
- Akses
- Open Access ✓