dc.contributor.author | Gomes, J. I. | |
dc.contributor.author | Pinfield, D.J. | |
dc.contributor.author | Marocco, F. | |
dc.contributor.author | Day-Jones, A. C. | |
dc.contributor.author | Burningham, B. | |
dc.contributor.author | Zhang, Z. H. | |
dc.contributor.author | Jones, H.R.A. | |
dc.contributor.author | van Spaandonk, L. | |
dc.contributor.author | Weights, D. | |
dc.date.accessioned | 2014-07-01T08:01:32Z | |
dc.date.available | 2014-07-01T08:01:32Z | |
dc.date.issued | 2013-05 | |
dc.identifier.citation | Gomes , J I , Pinfield , D J , Marocco , F , Day-Jones , A C , Burningham , B , Zhang , Z H , Jones , H R A , van Spaandonk , L & Weights , D 2013 , ' Two new ultracool benchmark systems from WISE+2MASS ' , Monthly Notices of the Royal Astronomical Society , vol. 431 , no. 3 , pp. 2745-2755 . https://doi.org/10.1093/mnras/stt371 | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | ORCID: /0000-0003-4600-5627/work/64327357 | |
dc.identifier.uri | http://hdl.handle.net/2299/13869 | |
dc.description.abstract | 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-circle dot = -3.78 +/- 0.045 and T-eff = 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 M-J appears to be brighter than the expected for their spectral types. | en |
dc.format.extent | 11 | |
dc.format.extent | 765525 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | surveys | |
dc.subject | brown dwarfs | |
dc.subject | stars: low-mass | |
dc.subject | ALL-SKY SURVEY | |
dc.subject | COMMON PROPER MOTION | |
dc.subject | LOW-MASS STARS | |
dc.subject | BROWN DWARF COMPANIONS | |
dc.subject | SPECTRAL TYPE-L | |
dc.subject | FIELD L-DWARFS | |
dc.subject | COOL NEIGHBORS | |
dc.subject | T-DWARFS | |
dc.subject | SOLAR NEIGHBORHOOD | |
dc.subject | ADAPTIVE OPTICS | |
dc.title | Two new ultracool benchmark systems from WISE+2MASS | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | School of Engineering and Technology | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1093/mnras/stt371 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |