dc.contributor.author | Großschedl, Josefa E. | |
dc.contributor.author | Alves, João | |
dc.contributor.author | Teixeira, Paula S. | |
dc.contributor.author | Bouy, Hervé | |
dc.contributor.author | Forbrich, Jan | |
dc.contributor.author | Lada, Charles J. | |
dc.contributor.author | Meingast, Stefan | |
dc.contributor.author | Hacar, Álvaro | |
dc.contributor.author | Ascenso, Joana | |
dc.contributor.author | Ackerl, Christine | |
dc.contributor.author | Hasenberger, Birgit | |
dc.contributor.author | Köhler, Rainer | |
dc.contributor.author | Kubiak, Karolina | |
dc.contributor.author | Larreina, Irati | |
dc.contributor.author | Linhardt, Lorenz | |
dc.contributor.author | Lombardi, Marco | |
dc.contributor.author | Möller, Torsten | |
dc.date.accessioned | 2019-01-18T00:10:02Z | |
dc.date.available | 2019-01-18T00:10:02Z | |
dc.date.issued | 2018-09-30 | |
dc.identifier.citation | Großschedl , J E , Alves , J , Teixeira , P S , Bouy , H , Forbrich , J , Lada , C J , Meingast , S , Hacar , Á , Ascenso , J , Ackerl , C , Hasenberger , B , Köhler , R , Kubiak , K , Larreina , I , Linhardt , L , Lombardi , M & Möller , T 2018 , ' VISION - Vienna survey in Orion. III. Young stellar objects in Orion A ' , Astronomy & Astrophysics . https://doi.org/10.1051/0004-6361/201832577 | |
dc.identifier.issn | 0004-6361 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1810.00878v1 | |
dc.identifier.other | ORCID: /0000-0001-8694-4966/work/62751222 | |
dc.identifier.uri | http://hdl.handle.net/2299/20992 | |
dc.description | 38 pages, 25 figures, Accepted for publication by A&A. Reproduced with permission from Astronomy & Astrophysics. © 2018 ESO | |
dc.description.abstract | We extend and refine the existing young stellar object (YSO) catalogs for the Orion A molecular cloud, the closest massive star-forming region to Earth. This updated catalog is driven by the large spatial coverage (18.3 deg^2, ~950 pc^2), seeing limited resolution (~0.7''), and sensitivity (Ks<19 mag) of the ESO-VISTA near-infrared survey of the Orion A cloud (VISION). Combined with archival mid- to far-infrared data, the VISTA data allow for a refined and more robust source selection. We estimate that among previously known protostars and pre-main-sequence stars with disks, source contamination levels (false positives) are at least ∼7% and ∼2.5%, respectively, mostly due to background galaxies and nebulosities. We identify 274 new YSO candidates using VISTA/Spitzer based selections within previously analyzed regions, and VISTA/WISE based selections to add sources in the surroundings, beyond previously analyzed regions. The WISE selection method recovers about 59% of the known YSOs in Orion A's low-mass star-forming part L1641, which shows what can be achieved by the all-sky WISE survey in combination with deep near-infrared data in regions without the influence of massive stars. The new catalog contains 2978 YSOs, which were classified based on the de-reddened mid-infrared spectral index into 188 protostars, 184 flat-spectrum sources, and 2606 pre-main-sequence stars with circumstellar disks. We find a statistically significant difference in the spatial distribution of the three evolutionary classes with respect to regions of high dust column-density, confirming that flat-spectrum sources are at a younger evolutionary phase compared to Class IIs, and are not a sub-sample seen at particular viewing angles. | en |
dc.format.extent | 11144031 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy & Astrophysics | |
dc.subject | astro-ph.SR | |
dc.subject | astro-ph.GA | |
dc.title | VISION - Vienna survey in Orion. III. Young stellar objects in Orion A | en |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1051/0004-6361/201832577 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |