Nguyen-Lu'o'ng, Q., Anderson, L. D., Motte, F., Kim, Kee-Tae ORCID: 0000-0003-2412-7092, Schilke, P., Carlhoff, P., Beuther, H., Schneider, N., Didelon, P., Kramer, C., Louvet, F., Nony, T., Bihr, S., Rugel, M., Soler, J., Wang, Y., Bronfman, L., Simon, R., Menten, K. M., Wyrowski, F. and Walmsley, C. M. (2017). Large-scale Map of Millimeter-wavelength Hydrogen Radio Recombination Lines around a Young Massive Star Cluster. Astrophys. J. Lett., 844 (2). BRISTOL: IOP PUBLISHING LTD. ISSN 2041-8213

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Abstract

We report the first map of large-scale (10 pc in length) emission of millimeter-wavelength hydrogen recombination lines (mm-RRLs) toward the giant H II region around the W43-Main young massive star cluster (YMC). Our mm-RRL data come from the IRAM 30 m telescope and are analyzed together with radio continuum and cm-RRL data from the Karl G. Jansky Very Large Array and HCO+ 1-0 line emission data from the IRAM 30 m. The mm-RRLs reveal an expanding wind-blown ionized gas shell with an electron density similar to 70-1500 cm(-3) driven by the WR/OB cluster, which produces a total Ly alpha photon flux of 1.5 x 10(50) s(-1). This shell is interacting with the dense neutral molecular gas in the W43-Main dense cloud. Combining the high spectral and angular resolution mm-RRL and cm-RRL cubes, we derive the two-dimensional relative distributions of dynamical and pressure broadening of the ionized gas emission and find that the RRL line shapes are dominated by pressure broadening (4-55 km s(-1)) near the YMC and by dynamical broadening (8-36 km s(-1)) near the shell's edge. Ionized gas clumps hosting ultra-compact H II regions found at the edge of the shell suggest that large-scale ionized gas motion triggers the formation of new star generation near the periphery of the shell.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Nguyen-Lu'o'ng, Q.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Anderson, L. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Motte, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kim, Kee-TaeUNSPECIFIEDorcid.org/0000-0003-2412-7092UNSPECIFIED
Schilke, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Carlhoff, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Beuther, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schneider, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Didelon, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kramer, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Louvet, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nony, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bihr, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rugel, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Soler, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wang, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bronfman, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Simon, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Menten, K. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wyrowski, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Walmsley, C. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-223617
DOI: 10.3847/2041-8213/aa7d48
Journal or Publication Title: Astrophys. J. Lett.
Volume: 844
Number: 2
Date: 2017
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 2041-8213
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
H-II REGIONS; COMPACT HII-REGIONS; MOLECULAR CLOUD; MILKY-WAY; INNER GALAXY; GAS-DYNAMICS; THOR SURVEY; CONTINUUM; COMPLEX; RADIATIONMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/22361

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