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Assessing the stellar population and the environment of an HII region on the far side of the Galaxy
- Publication Year :
- 2021
-
Abstract
- We have investigated the stellar and interstellar content of the distant star formation region IRAS 17591-2228 (WISE HII region GAL 007.47+0.06). It is associated to a water maser, whose parallax distance is d=20.4^{+2.8} {-2.2} kpc, supported by independent measurements of proper motion and radial velocity. It is projected in the same direction as an extremely red (J-Ks ~ 6 mag) group of stars, and a shell of mid-infrared emission. We qualify the group of stars as a cluster candidate, VVV CL177. Its radius spans between 0.45' and 1' and contains at least two young stellar objects with an extreme extinction near Av ~ 40 mag. Yet more analysis will be required to determine is it is a real single cluster associated with the water maser. The 13CO emissions at the radial velocity of the maser corresponds to the mid-infrared emission.<br />Comment: 10 pages, 5 figures, accepted for publication in ApJ
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2103.05849
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.3847/1538-4357/abec6f