dc.date.accessioned | 2020-08-14T20:42:49Z | |
dc.date.accessioned | 2022-10-18T23:40:31Z | |
dc.date.available | 2020-08-14T20:42:49Z | |
dc.date.available | 2022-10-18T23:40:31Z | |
dc.date.created | 2020-08-14T20:42:49Z | |
dc.date.issued | 2010 | |
dc.identifier | http://hdl.handle.net/10533/245885 | |
dc.identifier | 15010003 | |
dc.identifier | WOS:000283118100064 | |
dc.identifier | no scielo | |
dc.identifier | eid=2-s2.0-78650457381 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4477172 | |
dc.description.abstract | We report the discovery of a very cool, isolated brown dwarf, UGPS 0722-05, with the UKIDSS Galactic Plane Survey. The near-infrared spectrum displays deeper H2O and CH4 troughs than the coolest known T dwarfs and an unidentified absorption feature at 1.275 um. We provisionally classify the object as a T10 dwarf but note that it may in future come to be regarded as the first example of a new spectral type. The distance is measured by trigonometric parallax as d=4.1{-0.5}{+0.6} pc, making it the closest known isolated brown dwarf. With the aid of Spitzer/IRAC we measure H-[4.5] = 4.71. It is the coolest brown dwarf presently known -- the only known T dwarf that is redder in H-[4.5] is the peculiar T7.5 dwarf SDSS J1416+13B, which is thought to be warmer and more luminous than UGPS 0722-05. Our measurement of the luminosity, aided by Gemini/T-ReCS N band photometry, is L = 9.2 +/- 3.1x10^{-7} Lsun. Using a comparison with well studied T8.5 and T9 dwarfs we deduce Teff=520 +/- 40 K. This is supported by predictions of the Saumon & Marley models. With apparent magnitude J=16.52, UGPS 0722-05 is the brightest T dwarf discovered by UKIDSS so far. It offers opportunities for future study via high resolution near-infrared spectroscopy and spectroscopy in the thermal infrared. | |
dc.language | eng | |
dc.relation | https://arxiv.org/abs/1004.0317 | |
dc.relation | 10.1111/j.1745-3933.2010.00927.x | |
dc.relation | instname: ANID | |
dc.relation | reponame: Repositorio Digital RI2.0 | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.title | The discovery of a very cool, very nearby brown dwarf in the Galactic plane | |
dc.type | Articulo | |