VISION - Vienna survey in Orion. III. Young stellar objects in Orion A
| dc.contributor.author | GROSSSCHEDL, Josefa E. | |
| hal.structure.identifier | North Atlantic Treaty Organization (NATO) Science and Technology Organization (STO) Centre for Maritime Research and Experimentation (CMRE) | |
| dc.contributor.author | ALVES, João | |
| dc.contributor.author | TEIXEIRA, Paula S. | |
| hal.structure.identifier | M2A 2019 | |
| dc.contributor.author | BOUY, H. | |
| 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 | |
| hal.structure.identifier | Laboratoire de Spectrométrie Physique [LSP] | |
| dc.contributor.author | LOMBARDI, Marco | |
| hal.structure.identifier | Visualization and Data Analysis Research Group [Vienna] [VDA] | |
| dc.contributor.author | MÖLLER, Torsten | |
| dc.date.issued | 2019 | |
| dc.identifier.issn | 0004-6361 | |
| dc.description.abstractEn | We have extended and refined 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$^2$, $\sim$950 pc$^2$), seeing limited resolution ($\sim$0.7$"$), and sensitivity ($K_s<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 $\sim$6.4% and $\sim$2.3%, 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 2980 YSOs, which were classified based on the de-reddened mid-infrared spectral index into 188 protostars, 185 flat-spectrum sources, and 2607 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. | |
| dc.language.iso | en | |
| dc.publisher | EDP Sciences | |
| dc.subject.en | Astrophysics - Solar and Stellar Astrophysics | |
| dc.subject.en | Astrophysics - Astrophysics of Galaxies | |
| dc.title.en | VISION - Vienna survey in Orion. III. Young stellar objects in Orion A | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1051/0004-6361/201832577 | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM] | |
| dc.identifier.arxiv | 1810.00878 | |
| bordeaux.journal | Astronomy and Astrophysics - A&A | |
| bordeaux.page | id.A149 | |
| bordeaux.issue | 622 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01982239 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01982239v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2019&rft.issue=622&rft.spage=id.A149&rft.epage=id.A149&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=GROSSSCHEDL,%20Josefa%20E.&ALVES,%20Jo%C3%A3o&TEIXEIRA,%20Paula%20S.&BOUY,%20H.&FORBRICH,%20Jan&rft.genre=article |
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