SIMBAD references

2012MNRAS.422.1922P - Mon. Not. R. Astron. Soc., 422, 1922-1932 (2012/May-3)

Discovery of the benchmark metal-poor T8 dwarf BD +01° 2920B.

PINFIELD D.J., BURNINGHAM B., LODIEU N., LEGGETT S.K., TINNEY C.G., VAN SPAANDONK L., MAROCCO F., SMART R., GOMES J., SMITH L., LUCAS P.W., DAY-JONES A.C., MURRAY D.N., KATSIYANNIS A.C., CATALAN S., CARDOSO C., CLARKE J.R.A., FOLKES S., GALVEZ-ORTIZ M.C., HOMEIER D., JENKINS J.S., JONES H.R.A. and ZHANG Z.H.

Abstract (from CDS):

We have searched the Wide-field Infrared Survey Explorer first data release for widely separated ( ≤ 10 000 au) late T dwarf companions to Hipparcos and Gliese stars. We have discovered a new binary system containing a K-band suppressed T8p dwarf WISEP J142320.86+011638.1 and the mildly metal poor ([Fe/H] =-0.38±0.06) primary BD +01° 2920 (HIP 70319), a G1 dwarf at a distance of 17.2 pc. This new benchmark has Teff= 680±55 K and a mass of 20-50MJup. Its spectral properties are well modelled except for known discrepancies in the Y and K bands. Based on the well-determined metallicity of its companion, the properties of BD +01° 2920B imply that the currently known T dwarfs are dominated by young low-mass objects. We also present an accurate proper motion for the T8.5 dwarf WISEP J075003.84+272544.8.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

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

Status at CDS:  

Simbad objects: 18

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2020.06.06-16:42:16

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