The Massive Star-forming Regions Omnibus X-ray Catalog, Second Installment
Townsley, L; Broos, P; Garmire, G; et al.Anderson, G; Feigelson, E; Naylor, T; Povich, M
Date: 23 April 2018
Journal
Astrophysical Journal Supplement
Publisher
American Astronomical Society / IOP Publishing
Publisher DOI
Abstract
We present the second installment of the Massive Star-forming Regions (MSFRs) Omnibus X-ray
Catalog (MOXC2), a compilation of X-ray point sources detected in Chandra/ACIS observations of
16 Galactic MSFRs and surrounding elds. MOXC2 includes 13 ACIS mosaics, three containing a
pair of unrelated MSFRs at di erent distances, with a ...
We present the second installment of the Massive Star-forming Regions (MSFRs) Omnibus X-ray
Catalog (MOXC2), a compilation of X-ray point sources detected in Chandra/ACIS observations of
16 Galactic MSFRs and surrounding elds. MOXC2 includes 13 ACIS mosaics, three containing a
pair of unrelated MSFRs at di erent distances, with a total catalog of 18,396 point sources. The
MSFRs sampled range over distances of 1.3 kpc to 6 kpc and populations varying from single massive
protostars to the most massive Young Massive Cluster known in the Galaxy. By carefully detecting
and removing X-ray point sources down to the faintest statistically-signi cant limit, we facilitate the
study of the remaining unresolved X-ray emission. Through comparison with mid-infrared images
that trace photon-dominated regions and ionization fronts, we see that the unresolved X-ray emission
is due primarily to hot plasmas threading these MSFRs, the result of feedback from the winds and supernovae
of massive stars. The 16 MSFRs studied in MOXC2 more than double the MOXC1 sample,
broadening the parameter space of ACIS MSFR explorations and expanding Chandra's substantial
contribution to contemporary star formation science.
Physics and Astronomy
Faculty of Environment, Science and Economy
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