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        Assessing the stellar population and the environment of an HII region on the far side of the Galaxy

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        2103.05849v1.pdf (PDF, 587Kb)
        Author
        Chené, A. -N.
        Benjamin, R. A.
        Alegría, S. Ramírez
        Borissova, J.
        Kurtev, R.
        Bidin, C. Moni
        Mauro, F.
        Lucas, P.
        Guo, Z.
        Smith, L. C.
        Gonzalez-Fernandez, C.
        Ivanov, V. D.
        Minniti, D.
        Anderson, L. D.
        Armentrout, W. P.
        Gonzalez, D.
        Herrero, A.
        Ramírez, K. Peña
        Attention
        2299/24591
        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.
        Publication date
        2021-04-20
        Published in
        The Astrophysical Journal
        Published version
        https://doi.org/10.3847/1538-4357/abec6f
        Other links
        http://hdl.handle.net/2299/24591
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