SIMBAD references

2013MNRAS.431.2745G - Mon. Not. R. Astron. Soc., 431, 2745-2755 (2013/May-3)

Two new ultracool benchmark systems from WISE+2MASS.

GOMES J.I., PINFIELD D.J., MAROCCO F., DAY-JONES A.C., BURNINGHAM B., ZHANG Z.H., JONES H.R.A., VAN SPAANDONK L. and WEIGHTS D.

Abstract (from CDS):

We have used the Two-Micron All-Sky Survey and the Wide-field Infrared Survey Explorer to look for ultracool dwarfs that are part of multiple systems containing main-sequence stars. We cross-matched L dwarf candidates from the surveys with Hipparcos and Gliese stars, finding two new systems. The first system, G255-34AB, is an L2 dwarf companion to a K8 star, at a distance of 36 pc. We estimate its bolometric luminosity as log L/L☉ = -3.78 ± 0.045 and Teff = 2080±260 K. The second system, GJ499ABC, is a triple, with an L5 dwarf as a companion to a binary with an M4 and K5 star. These two new systems bring the number of L dwarf plus main-sequence star multiple systems to 24, which we discuss. We consider the binary fraction for L dwarfs and main-sequence stars, and further assess possible unresolved multiplicity within the full companion sample. This analysis shows that some of the L dwarfs in this sample might actually be unresolved binaries themselves, since their MJ appears to be brighter than the expected for their spectral types.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): surveys - brown dwarfs - stars: low-mass

Status at CDS:  

CDS comments: 2MASP J034532+254023 is a probable misprint for 2MASP J0345432+254023.

Simbad objects: 66

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2020.06.01-04:39:55

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