A Chandra X-Ray and infrared study of the stellar population in the high-mass star-forming region IRAS 16562-3959
- We present the results from Chandra X-ray observations, and near- and mid-infrared analysis, using VISTA/VVV and Spitzer/GLIMPSE catalogs, of the high-mass star-forming region IRAS 16562-3959, which contains a candidate for a high-mass protostar. We detected 249 X-ray sources within the ACIS-I field of view. The majority of the X-ray sources have low count rates (<0.638 cts/ks) and hard X-ray spectra. The search for YSOs in the region using VISTA/VVV and Spitzer/GLIMPSE catalogs resulted in a total of 636 YSOs, with 74 Class I and 562 Class II YSOs. The search for near- and mid-infrared counterparts of the X-ray sources led to a total of 165 VISTA/VVV counterparts, and a total of 151 Spitzer/GLIMPSE counterparts. The infrared analysis of the X-ray counterparts allowed us to identify an extra 91 Class III YSOs associated with the region. We conclude that a total of 727 YSOs are associated with the region, with 74 Class I, 562 Class II, and 91 Class III YSOs. We also found that the region is composed of 16 subclusters. In the vicinityWe present the results from Chandra X-ray observations, and near- and mid-infrared analysis, using VISTA/VVV and Spitzer/GLIMPSE catalogs, of the high-mass star-forming region IRAS 16562-3959, which contains a candidate for a high-mass protostar. We detected 249 X-ray sources within the ACIS-I field of view. The majority of the X-ray sources have low count rates (<0.638 cts/ks) and hard X-ray spectra. The search for YSOs in the region using VISTA/VVV and Spitzer/GLIMPSE catalogs resulted in a total of 636 YSOs, with 74 Class I and 562 Class II YSOs. The search for near- and mid-infrared counterparts of the X-ray sources led to a total of 165 VISTA/VVV counterparts, and a total of 151 Spitzer/GLIMPSE counterparts. The infrared analysis of the X-ray counterparts allowed us to identify an extra 91 Class III YSOs associated with the region. We conclude that a total of 727 YSOs are associated with the region, with 74 Class I, 562 Class II, and 91 Class III YSOs. We also found that the region is composed of 16 subclusters. In the vicinity of the high-mass protostar, the stellar distribution has a core-halo structure. The subcluster containing the high-mass protostar is the densest and the youngest in the region, and the high-mass protostar is located at its center. The YSOs in this cluster appear to be substantially older than the high-mass protostar.…
| Author details: | Virginie A. MontesORCiD, Peter Hofner, Lida OskinovaORCiDGND, Hendrik LinzGND |
|---|---|
| DOI: | https://doi.org/10.3847/1538-4357/ab59cf |
| ISSN: | 0004-637X |
| ISSN: | 1538-4357 |
| Title of parent work (English): | The astrophysical journal : an international review of spectroscopy and astronomical physics |
| Publisher: | Institute of Physics Publ. |
| Place of publishing: | London |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2020/01/15 |
| Publication year: | 2020 |
| Release date: | 2023/11/06 |
| Tag: | X-ray stars; massive stars; pre-main sequence stars; protostars; star formation; young star clusters |
| Volume: | 888 |
| Issue: | 2 |
| Article number: | 118 |
| Number of pages: | 15 |
| Funding institution: | SAO grants [GO3-14005X, GO5-16008X]; NSFNational Science Foundation; (NSF) [AST-0908901, AST-1814011]; New Mexico Institute of Mining and; Technology Research Office |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften |
| Peer review: | Referiert |
| Publishing method: | Open Access / Green Open-Access |
