SIMBAD references

2014MNRAS.444.1931P - Mon. Not. R. Astron. Soc., 444, 1931-1939 (2014/October-3)

Discovery of a new Y dwarf: WISE J030449.03-270508.3.

PINFIELD D.J., GROMADZKI M., LEGGETT S.K., GOMES J., LODIEU N., KURTEV R., DAY-JONES A.C., RUIZ M.T., COOK N.J., MORLEY C.V., MARLEY M.S., MAROCCO F., SMART R.L., JONES H.R.A., LUCAS P.W., BELETSKY Y., IVANOV V.D., BURNINGHAM B., JENKINS J.S., CARDOSO C., FRITH J., CLARKE J.R.A., GALVEZ-ORTIZ M.C. and ZHANG Z.

Abstract (from CDS):

We present a new Y dwarf, WISE J030449.03-270508.3, confirmed from a candidate sample designed to pick out low-temperature objects from the Wide-field Infrared Survey Explorer (WISE) data base. The new object is typed Y0pec following a visual comparison with spectral standards, and lies at a likely distance of 10^–17 pc. Its tangential velocity suggests thin disc membership, but it shows some spectral characteristics that suggest that it may be metal poor and/or older than previously identified Y0 dwarfs. Based on trends seen for warmer late-type T dwarfs, the Y-band flux peak morphology is indicative of sub-solar metallicity, and the enhanced red wing of the J-band flux peak offers evidence for high gravity and/or low metallicity (with associated model trends suggesting an age closer to ∼ 10 Gyr and mass in the range 0.02-0.03 M_☉). This object may thus be extending the population parameter space of the known Y0 dwarfs.

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

CDS comments: The good reference for WISE J0647-6232 is Kirkpatrick et al. 2013. WISE J1405+5334 is a misprint for WISE J1405+5534.

Simbad objects: 21

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