Volume 567, July 2014
|Number of page(s)||8|
|Section||Galactic structure, stellar clusters and populations|
|Published online||04 July 2014|
A dusty M5 binary in the β Pictoris moving group
Departamento de AstronomíaUniversidad de Chile,
2 Dept. of Physics & Astronomy, University of California, Los Angeles 90095, USA
3 Dept. of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road NW, Washington DC 20015, USA
Received: 10 February 2014
Accepted: 8 April 2014
We report the identification of a new wide separation binary (LDS 5606) in the ~20 Myr-old β Pic moving group. This M5+M5 pair has a projected separation of 26′′, or ~1700 AU at a distance of 65 pc. Both stars host warm circumstellar disks and many strong hydrogen and helium emission lines. Spectroscopic observations reveal signatures of youth for both stars and on-going mass accretion in the primary. The properties of LDS 5606 make it an older analog to the ~8 Myr TWA 30 system, which is also composed of a pair of widely separated mid-M dwarfs, each hosting their own warm circumstellar disks. The binary star LDS 5606 joins a rather exclusive club of only three other known binary systems, far from any molecular cloud, where both members are orbited by detected circumstellar disks.
Key words: binaries: general / open clusters and associations: individual: beta Pictoris / stars: evolution / stars: pre-main sequence
© ESO, 2014
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.