SIMBAD references

2010ApJ...708L.107L - Astrophys. J., 708, L107-L111 (2010/January-2)

GTC/OSIRIS spectroscopic identification of a faint l subdwarf in the UKIRT infrared deep sky survey.

LODIEU N., ZAPATERO OSORIO M.R., MARTIN E.L., SOLANO E. and ABERASTURI M.

Abstract (from CDS):

We present the discovery of an L subdwarf in 234 deg2 common to the UK InfraRed Telescope (UKIRT) Infrared Deep Sky Survey Large Area Survey Data Release 2 and the Sloan Digital Sky Survey Data Release 3. This is the fifth L subdwarf announced to date, the first one identified in the UKIRT Infrared Deep Sky Survey, and the faintest known. The blue optical and near-infrared colors of ULAS J135058.86+081506.8 and its overall spectra energy distribution are similar to the known mid-L subdwarfs. Low-resolution optical (700-1000 nm) spectroscopy with the Optical System for Imaging and low Resolution Integrated Spectroscopy spectrograph on the 10.4 m Gran Telescopio de Canarias reveals that ULAS J135058.86+081506.8 exhibits a strong K I pressure-broadened line at 770 nm and a red slope longward of 800 nm, features characteristics of L-type dwarfs. From direct comparison with the four known L subdwarfs, we estimate its spectral type to be sdL4-sdL6 and derive a distance in the interval 94-170 pc. We provide a rough estimate of the space density for mid-L subdwarfs of 1.5x10–4/pc3.

Abstract Copyright:

Journal keyword(s): infrared: stars - stars: Population II - subdwarfs - techniques: photometric - techniques: spectroscopic

Simbad objects: 10

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2021.09.21-00:47:16

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