dc.contributor.author | Day-Jones, A. C. | |
dc.contributor.author | Marocco, F. | |
dc.contributor.author | Pinfield, D.J. | |
dc.contributor.author | Zhang, Z. H. | |
dc.contributor.author | Burningham, B. | |
dc.contributor.author | Deacon, Niall | |
dc.contributor.author | Ruiz, M. T. | |
dc.contributor.author | Gallardo, J. | |
dc.contributor.author | Jones, H.R.A. | |
dc.contributor.author | Lucas, P.W. | |
dc.contributor.author | Jenkins, J. S. | |
dc.contributor.author | Gomes, J. | |
dc.contributor.author | Folkes, S. L. | |
dc.contributor.author | Clarke, J. R. A. | |
dc.date.accessioned | 2014-07-01T08:01:35Z | |
dc.date.available | 2014-07-01T08:01:35Z | |
dc.date.issued | 2013-04 | |
dc.identifier.citation | Day-Jones , A C , Marocco , F , Pinfield , D J , Zhang , Z H , Burningham , B , Deacon , N , Ruiz , M T , Gallardo , J , Jones , H R A , Lucas , P W , Jenkins , J S , Gomes , J , Folkes , S L & Clarke , J R A 2013 , ' The sub-stellar birth rate from UKIDSS ' , Monthly Notices of the Royal Astronomical Society , vol. 430 , no. 2 , pp. 1171-1187 . https://doi.org/10.1093/mnras/sts685 | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | ORCID: /0000-0002-8872-4462/work/62748868 | |
dc.identifier.other | ORCID: /0000-0003-4600-5627/work/64327327 | |
dc.identifier.uri | http://hdl.handle.net/2299/13870 | |
dc.description.abstract | We present a new sample of mid-L to mid-T dwarfs with effective temperatures of 11001700 K selected from the UKIDSS Large Area Survey (LAS) and confirmed with infrared spectra from X-shooter/Very Large Telescope. This effective temperature range is especially sensitive to the formation history of Galactic brown dwarfs and allows us to constrain the form of the sub-stellar birth rate, with sensitivity to differentiate between a flat (stellar like) birth rate and an exponentially declining form. We present the discovery of 63 new L and T dwarfs from the UKIDSS LAS DR7, including the identification of 12 likely unresolved binaries, which form the first complete sub-set from our programme, covering 495 square degrees of sky, complete to J = 18.1. We compare our results for this sub-sample with simulations of differing birth rates for objects of masses 0.10-0.03 M-circle dot and ages 1-10 Gyr. We find that the more extreme birth rates (e. g. a halo type form) can likely be excluded as the true form of the birth rate. In addition, we find that although there is substantial scatter we find a preference for a mass function, with a power-law index a in the range -1 <alpha <0 that is consistent (within the errors) with the studies of late T dwarfs. | en |
dc.format.extent | 17 | |
dc.format.extent | 1304972 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | brown dwarfs | |
dc.subject | stars: low-mass | |
dc.subject | stars: luminosity function, mass function | |
dc.subject | ALL-SKY SURVEY | |
dc.subject | DWARF/T-DWARF TRANSITION | |
dc.subject | SUBSTELLAR MASS FUNCTION | |
dc.subject | PROPER MOTION SURVEY | |
dc.subject | SURVEY-EXPLORER WISE | |
dc.subject | STAR-FORMING REGION | |
dc.subject | YOUNG MOVING GROUPS | |
dc.subject | LARGE-AREA SURVEY | |
dc.subject | BROWN DWARFS | |
dc.subject | T-DWARFS | |
dc.title | The sub-stellar birth rate from UKIDSS | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.contributor.institution | School of Engineering and Technology | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1093/mnras/sts685 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |