Bonne, L., Schneider, N., Garcia, P., Bij, A., Broos, P., Fissel, L., Guesten, R., Jackson, J., Simon, R., Townsley, L., Zavagno, A., Aladro, R., Buchbender, C., Guevara, C., Higgins, R., Jacob, A. M., Kabanovic, S., Karim, R., Soam, A., Stutzki, J., Tiwari, M., Wyrowski, F. and Tielens, A. G. G. M. (2022). The SOFIA FEEDBACK Legacy Survey Dynamics and Mass Ejection in the Bipolar H ii Region RCW 36. Astrophys. J., 935 (2). BRISTOL: IOP Publishing Ltd. ISSN 1538-4357

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Abstract

We present [C ii] 158 mu m and [O i] 63 mu m observations of the bipolar H ii region RCW 36 in the Vela C molecular cloud, obtained within the SOFIA legacy project FEEDBACK, which is complemented with APEX (CO)-C-12/13 (3-2) and Chandra X-ray (0.5-7 keV) data. This shows that the molecular ring, forming the waist of the bipolar nebula, expands with a velocity of 1-1.9 km s(-1). We also observe an increased line width in the ring, indicating that turbulence is driven by energy injection from the stellar feedback. The bipolar cavity hosts blueshifted expanding [C ii] shells at 5.2 +/- 0.5 +/- 0.5 km s(-1) (statistical and systematic uncertainty), which indicates that expansion out of the dense gas happens nonuniformly and that the observed bipolar phase might be relatively short (similar to 0.2 Myr). The X-ray observations show diffuse emission that traces a hot plasma, created by stellar winds, in and around RCW 36. At least 50% of the stellar wind energy is missing in RCW 36. This is likely due to leakage that is clearing even larger cavities around the bipolar RCW 36 region. Lastly, the cavities host high-velocity wings in [C ii], which indicates relatively high mass ejection rates (similar to 5 x 10(-4) M (circle dot) yr(-1)). This could be driven by stellar winds and/or radiation but remains difficult to constrain. This local mass ejection, which can remove all mass within 1 pc of RCW 36 in 1-2 Myr, and the large-scale clearing of ambient gas in the Vela C cloud indicate that stellar feedback plays a significant role in suppressing the star formation efficiency.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Bonne, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schneider, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Garcia, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bij, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Broos, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fissel, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guesten, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jackson, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Simon, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Townsley, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zavagno, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aladro, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Buchbender, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guevara, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Higgins, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jacob, A. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kabanovic, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Karim, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Soam, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stutzki, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tiwari, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wyrowski, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tielens, A. G. G. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-694634
DOI: 10.3847/1538-4357/ac8052
Journal or Publication Title: Astrophys. J.
Volume: 935
Number: 2
Date: 2022
Publisher: IOP Publishing Ltd
Place of Publication: BRISTOL
ISSN: 1538-4357
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
YOUNG STELLAR OBJECTS; NEUTRAL ATOMIC PHASES; VELA MOLECULAR CLOUDS; K-BAND SPECTROSCOPY; STAR-FORMATION; INTERSTELLAR-MEDIUM; MAGNETOHYDRODYNAMIC SIMULATIONS; PHOTODISSOCIATION REGIONS; INITIAL CONDITIONS; MAGNETIC-FIELDSMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/69463

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