From low - resolution optical and near - IR spectroscopy we classified the primary and the companion as an M7.5 +... ▽ More In a search for common
proper motion companions using the VISTA Hemisphere Survey and 2MASS catalogs we have identified a very red (J - Ks = 2.47 mag) late - L dwarf companion of a previously unrecognized M dwarf VHS J125601.92 - 125723.9, located at a projected angular separation of 8.06» + / -0.03».
Abstract: In a search for common
proper motion companions using the VISTA Hemisphere Survey and 2MASS catalogs we have identified a very red (J - Ks = 2.47 mag) late - L dwarf companion of a previously unrecognized M dwarf VHS J125601.92 - 125723.9, located at a projected angular separation of 8.06» + / -0.03».
Two of these candidates are common
proper motion companions to nearby main sequence stars; if confirmed as binaries, these would be rare benchmark systems with the potential to stringently test ultracool evolutionary models.
Not exact matches
CM Draconis Aa has a close, double - lined spectroscopic
companion Ab, with which it forms a non-contact, eclipsing binary, and a wide common -
proper -
motion companion B. Stars Aab and B have an observed separation of about 420 AUs (25.7»).
On May 21, 2002, a team of astronomers (Patrick J. Lowrance, J. Davy Kirkpatrick, and Charles A. Beichman) announced that Upsilon Andromedae has a dim stellar
companion B that shares the same common
proper motion as Star A. Upsilon Andromedae B currently is separated from Star A by around 750 AUs.
The primary stars around which we searched for
companions come from a list of bright stars with well - measured parallaxes and large
proper motions from the Hipparcos catalog (8583 stars, mostly A-K ~ dwarfs) and fainter stars from other
proper motion catalogues (79170 stars, mostly M ~ dwarfs).
Zeta1 has a brighter but distant stellar
companion, Zeta2 Reticuli, currently located around 3,750 AUs away (based on an observed separation of 310» and HIPPARCOS distance estimates of 39.40 to 39.53 ly), with common
proper motion and equal radial velocities (Da Silva and Foy, 1987).
We report here the direct imaging discovery of 2MASS J01033563 - 5515561 (AB) b, a 12 - 14 MJup
companion at a projected separation of 84 AU from a pair of young late M stars, with which it shares
proper motion.
The extremely dim
companion object was observed to share the same high
proper motion as Epsilon Indi — around 4.7 arcseconds per year — from the perspective of an observer in the Solar System.
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