Discovery of the Widest Very Low Mass Binary | Zendy

Étienne Artigau | Zendy; David Lafrenière | Zendy; René Doyon | Zendy; Loïc Albert | Zendy; Daniel Nadeau | Zendy; Jasmin Robert | Zendy

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Discovery of the Widest Very Low Mass Binary

Author(s) -

Étienne Artigau,

David Lafrenière,

René Doyon,

Loïc Albert,

Daniel Nadeau,

Jasmin Robert

Publication year - 2007

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/516710

Subject(s) - binary number , binary system , mass spectrum , physics , astrophysics , low mass , component (thermodynamics) , spectral line , mass ratio , mass spectrometry , astronomy , mathematics , stars , thermodynamics , arithmetic , quantum mechanics

We report the discovery of a very low mass binary system (primary mass <0.1Msol) with a projected separation of ~5100 AU, more than twice that of thewidest previously known system. A spectrum covering the 1-2.5 micronswavelength interval at R ~1700 is presented for each component. Analysis of thespectra indicates spectral types of M6.5V and M8V, and the photometric distanceof the system is ~62 pc. Given that previous studies have established that nomore than 1% of very low mass binary systems have orbits larger than 20 AU, theexistence of such a wide system has a bearing on very low mass star formationand evolution models.Comment: accepted ApJL, 4 page

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