dc.contributor.author | Riaz, Basmah | |
dc.contributor.author | Lodieu, Nicolas | |
dc.contributor.author | Gizis, John E. | |
dc.date.accessioned | 2011-12-14T16:01:17Z | |
dc.date.available | 2011-12-14T16:01:17Z | |
dc.date.issued | 2009-11-10 | |
dc.identifier.citation | Riaz , B , Lodieu , N & Gizis , J E 2009 , ' BROWN DWARF DISKS AT AGES OF 5-10 Myr ' , The Astrophysical Journal , vol. 705 , no. 2 , pp. 1173-1182 . https://doi.org/10.1088/0004-637X/705/2/1173 | |
dc.identifier.issn | 0004-637X | |
dc.identifier.uri | http://hdl.handle.net/2299/7273 | |
dc.description.abstract | We present Spitzer/IRAC and MIPS 24 mu m observations for 28 brown dwarfs in the Upper Scorpius (UppSco) region. We find a disk fraction of 10.7%-(+ 8.7%)(3.3%) . One object shows a small excess at 24 mu m but none at shorter wavelengths, and may be a candidate transition disk. Three objects show emission in the 10 mu m silicate feature and we present compositional fits for these sources. Flat structures are observed for all disk sources in UppSco. Also presented are the MIPS/70 mu m observations for the TW Hydrae Association brown dwarf 2MASS J1139511-315921. We discuss the structure and chemistry of brown dwarf disks at ages of similar to 5-10 Myr, and consider the possible effects of the brown dwarf densities in these clusters on the disk lifetimes. | en |
dc.format.extent | 10 | |
dc.language.iso | eng | |
dc.relation.ispartof | The Astrophysical Journal | |
dc.subject | circumstellar matter | |
dc.subject | open clusters and associations: individual (Taurus, Upper Scorpius) | |
dc.subject | stars: low-mass, brown dwarfs | |
dc.subject | SCORPIUS OB ASSOCIATION | |
dc.subject | TW-HYDRAE-ASSOCIATION | |
dc.subject | LOW-MASS STARS | |
dc.subject | MAIN-SEQUENCE STARS | |
dc.subject | LARGE-AREA SEARCH | |
dc.subject | TAURI STARS | |
dc.subject | FORMING REGION | |
dc.subject | GRAIN-GROWTH | |
dc.subject | PROTOPLANETARY DISKS | |
dc.subject | SPITZER OBSERVATIONS | |
dc.title | BROWN DWARF DISKS AT AGES OF 5-10 Myr | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1088/0004-637X/705/2/1173 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |