|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'502'364
Articles rated: 2609
23 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Characterization of the Nearby L/T Binary Brown Dwarf WISE J104915.57-531906.1 at 2 Parsecs from the Sun | | A. Y. Kniazev
; P. Vaisanen
; K. Muzic
; A. Mehner
; H. M. J. Boffin
; R. Kurtev
; C. Melo
; V. D. Ivanov
; J. Girard
; D. Mawet
; L. Schmidtobreick
; N. Huelamo
; J. Borissova
; D. Minniti
; K. Ishibashi
; S. B. Potter
; Y. Beletsky
; D. A. H. Buckley
; S. Crawford
; A. A. S. Gulbis
; P. Kotze
; B. Miszalski
; T. E. Pickering
; E. Romero Colmenero
; T. B. Williams
; | | Date: |
28 Mar 2013 | | Abstract: | WISE J104915.57-531906.1 is a candidate L/T brown dwarf binary located 2pc
from the Sun. The pair contains the closest known brown dwarfs and is the third
closest known system, stellar or sub-stellar. Here we report the first
comprehensive follow-up observations of this newly uncovered system. We have
determined the spectral types of both components (L8+/-1, T1+/-2) and their
radial velocities (V_rad~23.1, 19.5 km/s) using the Southern African Large
Telescope (SALT) and other facilities located at the South African Astronomical
Observatory (SAAO). The relative radial velocity of the two components is
smaller than the range of orbital velocities for theoretically predicted
masses, implying that they form a gravitationally bound system. We report
resolved near-infrared $JHK_S$ photometry from the IRSF telescope at the SAAO
which yields colors consistent with the spectroscopically derived spectral
types. Our apparent magnitudes predict a distance of ~2.25pc, similar to the
previous measurement. The available kinematic and photometric information
excludes the possibility that the object belongs to any of the known nearby
young moving groups or associations. Simultaneous optical polarimetry
observations taken at the SAAO 1.9-m give a non-detection with an upper limit
of 0.07%. For the given spectral types and absolute magnitudes, 1Gyr
theoretical models predict masses of 0.04--0.05,M_odot for the primary, and
0.03--0.05,M_odot for the secondary. The objects remain in the sub-stellar
regime even if they are 10Gyr old. | | Source: | arXiv, 1303.7171 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER