Cool dwarfs in wide multiple systems. Paper 4: a common-proper-motion pair of two identical mid-M dwarfs separated by about 10000 AU

2012/07/22 by F. M. Rica, J. A. Caballero, Rica, F. M. +1
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Gamma-ray bursts and supernovae #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies #astro-ph.GA #astro-ph.SR

paper · pdf · doi:10.48550/arxiv.1207.5251

The Observatory, in press, to appear in October 2012

arxiv created 2012/07/22 · openalex publication_date 2012/07/22 · arxiv updated 2012/07/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

LSPM J0651+1843 and LSPM J0651+1845 are two high-proper-motion stars recently claimed to form a binary system, FMR 83, by Rica (2012). Here we characterize the system in detail, using astrometric and photometric data, and find that the pair consists of two M4+/-1 dwarfs separated by 9500^(+6200)_(-3800) AU. With these results, FMR 83 becomes one of the very few 'ultrafragile' systems (i.e., systems with very low total masses and very wide physical separations), many of which have been identified in this series of papers.

Related

• Cool dwarfs in wide multiple systems: Paper I: Two mid-M dwarfs in a loosely-bound common-proper-motion pair
• Cool dwarfs in wide multiple systems. Paper 3: Two common-proper-motion, late-type stars separated by over 11 arcmin
• Cool dwarfs in wide multiple systems: Paper 2: A distant M8.5V companion to HD 212168 AB
• Benchmark ultra-cool dwarfs in widely separated binary systems
• Cool dwarfs in wide multiple systems. Paper 5: New astrometry of 54 wide pairs with M dwarfs