dc.contributor.author | Valdivielso, L. | |
dc.contributor.author | Martin, E.L. | |
dc.contributor.author | Bouy, H. | |
dc.contributor.author | Solano, E. | |
dc.contributor.author | Drew, J.E. | |
dc.contributor.author | Greimel, R. | |
dc.contributor.author | Gutierrez, R. | |
dc.contributor.author | Unruh, Y.C. | |
dc.contributor.author | Vink, J.S. | |
dc.date.accessioned | 2009-05-12T13:37:24Z | |
dc.date.available | 2009-05-12T13:37:24Z | |
dc.date.issued | 2009 | |
dc.identifier.citation | Valdivielso , L , Martin , E L , Bouy , H , Solano , E , Drew , J E , Greimel , R , Gutierrez , R , Unruh , Y C & Vink , J S 2009 , ' An IPHAS-based search for accreting very low-mass objects using VO tools ' , Astronomy and Astrophysics , vol. 497 , no. 3 , pp. 973-981 . https://doi.org/10.1051/0004-6361/200810256 | |
dc.identifier.issn | 0004-6361 | |
dc.identifier.other | dspace: 2299/3363 | |
dc.identifier.uri | http://hdl.handle.net/2299/3363 | |
dc.description | Original article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory (ESO) DOI: 10.1051/0004-6361/200810256 | |
dc.description.abstract | Context. The main goal of this paper is to prove that accreting very low-mass stars and brown dwarfs can be identified in IPHAS, an H emission survey of the northern Milky Way. Full exploitation of the IPHAS database and a future extension of it in the southern hemisphere will be useful in identifying very low-mass accreting objects near to and far from well-known star-forming regions. Aims. We have used Virtual Observatory tools to cross-match the IPHAS catalogue with the 2MASS catalogue. We defined photometric criteria to identify H emission sources with near-infrared colours similar to those of known young very low-mass stars and brown dwarfs. 4000 candidates were identified that met our criteria over an area of 1600 square degrees. We present low-resolution optical spectra of 113 candidates. Spectral types have been derived for the 33 candidates that have spectroscopically confirmed H emission, negligible reddening and spectral class M. We have also measured H emission and investigated the NaI doublet (818.3 nm, 819.5 nm) in these 33 objects. Methods. We confirm that 33 IPHAS candidates have strong H emission indicative of disc accretion for their spectral type. Twenty-three of them have spectral class M4 or later, of which ten have classes in the range M5.5–M7.0 and could thus be very young brown dwarfs. Many objects also have a weak NaI doublet, an indication of low surface gravity. Results. IPHAS provides a very valuable database for identifying accreting very low-mass stars and brown dwarfs. Virtual Observatory tools provide an efficient method for identifying these objects over large areas of the sky. Based on our success rate of 23 H emission objects with spectral type in the range M4–M7 out of 113 candidates with spectroscopic follow-up, we estimate that there could be hundreds of such objects in the full IPHAS survey. | en |
dc.format.extent | 242507 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy and Astrophysics | |
dc.title | An IPHAS-based search for accreting very low-mass objects using VO tools | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1051/0004-6361/200810256 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |