Universität zu Köln

Tiwari, M., Wolfire, M., Pound, M. W., Tarantino, E., Karim, R., Bonne, L., Buchbender, C., Guesten, R., Guevara, C., Kabanovic, S., Kavak, U., Mertens, M., Schneider, N., Simon, R., Stutzki, J. and Tielens, A. G. G. M. (2022). SOFIA FEEDBACK Survey: PDR Diagnostics of Stellar Feedback in Different Regions of RCW 49. Astron. J., 164 (4). BRISTOL: IOP Publishing Ltd. ISSN 1538-3881

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Abstract

We quantified the effects of stellar feedback in RCW 49 by determining the physical conditions in different regions using the [C ii] 158 mu m and [O i] 63 mu m observations from SOFIA, the (CO)-C-12 (3-2) observations from APEX, and the H-2 line observations from Spitzer telescopes. Large maps of RCW 49 were observed with the SOFIA and APEX telescopes, while the Spitzer observations were only available toward three small areas. From our qualitative analysis, we found that the H-2 0-0 S(2) emission line probes denser gas compared to the H-2 0-0 S(1) line. In four regions (northern cloud, pillar, ridge, and shell), we compared our observations with the updated PDR Toolbox models and derived the integrated far-ultraviolet flux between 6 and 13.6 eV (G (0)), H nucleus density (n), temperatures, and pressures. We found the ridge to have the highest G (0) (2.4 x 10(3) Habing units), while the northern cloud has the lowest G (0) (5 x 10(2) Habing units). This is a direct consequence of the location of these regions with respect to the Wd2 cluster. The ridge also has a high density (6.4 x 10(3) cm(-3)), which is consistent with its ongoing star formation. Among the Spitzer positions, we found the one closest to the Wd2 cluster to be the densest, suggesting an early phase of star formation. Furthermore, the Spitzer position that overlaps with the shell was found to have the highest G (0), and we expect this to be a result of its proximity to an O9V star.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Tiwari, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wolfire, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pound, M. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tarantino, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Karim, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bonne, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Buchbender, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Guesten, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Guevara, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kabanovic, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kavak, U. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mertens, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schneider, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Simon, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stutzki, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tielens, A. G. G. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-686151
DOI:	10.3847/1538-3881/ac8a44
Journal or Publication Title:	Astron. J.
Volume:	164
Number:	4
Date:	2022
Publisher:	IOP Publishing Ltd
Place of Publication:	BRISTOL
ISSN:	1538-3881
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FINE-STRUCTURE LINES; 63 MU-M; WESTERLUND 2; C-II; PHOTODISSOCIATION REGIONS; INTERSTELLAR-MEDIUM; MOLECULAR CLOUDS; EMISSION; GLIMPSE; ORION Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68615