A Dusty M5 Binary in the beta Pictoris Moving Group

Abstract

We report the identification of a new wide separation binary (LDS 5606) in the ~20 Myr-old beta 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. LDS 5606 joins a rather exclusive club of only 3 other known stellar systems where both members of a binary, far from any molecular cloud, are orbited by detected circumstellar disks.

8 pages, 6 figures; Accepted for publication in A&A

References in corpus (6)

• Low-Mass Dwarf Template Spectra from the Sloan Digital Sky Survey
• New Low-Mass Stars and Brown Dwarfs with Disks in the Chamaeleon I Star-Forming Region
• A New Method to Identify Nearby, Young, Low-mass Stars
• A kinematic study of the Taurus-Auriga T association
• SSPMJ1102-3431 brown dwarf characterization from accurate proper motion and trigonometric parallax
• Accretion and OH Photodissociation at a Nearby T Tauri System in the beta Pictoris Moving Group

Cited by in corpus (6)

• All-sky Co-moving Recovery Of Nearby Young Members. (ACRONYM) II: The Beta Pictoris Moving Group
• Short dissipation times of proto-planetary discs - an artifact of selection effects?
• LACEwING: A New Moving Group Analysis Code
• Warm Dusty Debris Disks and Distant Companion Stars: V488 Per and 2M1337
• A Census of the 32 Ori Association with Gaia
• Herschel Observations of Disks around Late-type Stars