Anderson, L. D., Makai, Z., Luisi, M., Andersen, M., Russeil, D., Samal, M. R., Schneider, N., Tremblin, P., Zavagno, A., Kirsanova, M. S., Ossenkopf-Okada, V and Sobolev, A. M. (2019). The Origin of [C II] 158 mu m Emission toward the H II Region Complex S235. Astrophys. J., 882 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357
Full text not available from this repository.Abstract
Although the P-2(3/2) - P-2(1/2) transition of [C II] at lambda similar or equal to 158 mu m is known to be an excellent tracer of active star formation, we still do not have a complete understanding of where within star formation regions the emission originates. Here, we use SOFIA upGREAT observations of [C II] emission toward the H II region complex Sh2-235 (S235) to better understand in detail the origin of [C II] emission. We complement these data with a fully sampled Green Bank Telescope radio recombination line map tracing the ionized hydrogen gas. About half of the total [C II] emission associated with S235 is spatially coincident with ionized hydrogen gas, although spectroscopic analysis shows little evidence that this emission is coming from the ionized hydrogen volume. Velocity-integrated [C II] intensity is strongly correlated with Wide-field Infrared Survey Explorer (WISE) 12 mu m intensity across the entire complex, indicating that both trace ultraviolet radiation fields. The 22 mu m and radio continuum intensities are only correlated with [C II] intensity in the ionized hydrogen portion of the S235 region and the correlations between the [C II] and molecular gas tracers are poor across the region. We find similar results for emission averaged over a sample of external galaxies, although the strength of the correlations is weaker. Therefore, although many tracers are correlated with the strength of [C II] emission, only WISE 12 mu m emission is correlated on small scales of the individual H II region S235 and also has a decent correlation at the scale of entire range of galaxies. Future studies of a larger sample of Galactic H II regions would help to determine whether these results are truly representative.
| Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Creators: |
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| URN: | urn:nbn:de:hbz:38-143325 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| DOI: | 10.3847/1538-4357/ab1c59 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Journal or Publication Title: | Astrophys. J. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Volume: | 882 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Number: | 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Date: | 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Publisher: | IOP PUBLISHING LTD | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Place of Publication: | BRISTOL | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| ISSN: | 1538-4357 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Language: | English | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Faculty: | Unspecified | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Divisions: | Unspecified | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Subjects: | no entry | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Uncontrolled Keywords: |
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| Refereed: | Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| URI: | http://kups.ub.uni-koeln.de/id/eprint/14332 |
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