Published in

Oxford University Press (OUP), Monthly Notices of the Royal Astronomical Society, 2(444), p. 1931-1939

DOI: 10.1093/mnras/stu1540

Links

Tools

Export citation

Search in Google Scholar

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

Journal article published in 2014 by D. J. Pinfield, M. Gromadzki, S. K. Leggett, J. Gomes, N. Lodieu, R. Kurtev, A. C. Day-Jones, M. T. Ruiz, N. J. Cook ORCID, C. V. Morley, M. S. Marley ORCID, F. Marocco, R. L. Smart, H. R. A. Jones ORCID, P. W. Lucas and other authors.
This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Green circle
Preprint: archiving allowed
Upload
Green circle
Postprint: archiving allowed
Upload
Green circle
Published version: archiving allowed
Upload
Policy details
Data provided by SHERPA/RoMEO

Abstract

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 WISE database. 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 disk membership, but it shows some spectral characteristics that suggest 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 Mo). This object may thus be extending the population parameter-space of the known Y0 dwarfs. ; Comment: 10 pages, 6 figures, accepted for publication in MNRAS