The shocked molecular layer in RCW 120
arXiv:2212.08702 · doi:10.1093/mnras/stac3737
Abstract
Expansion of wind-blown bubbles or HII regions lead to formation of shocks in the interstellar medium, which compress surrounding gas into dense layers. We made spatially and velocity-resolved observations of the RCW~120 PDR and nearby molecular gas with CO(6-5) and 13CO(6-5) lines and distinguished a bright CO-emitting layer, which we related with the dense shocked molecular gas moving away from the ionizing star due to expansion of HII region. Simulating gas density and temperature, as well as brightness of several CO and C+ emission lines from the PDR, we found reasonable agreement with the observed values. Analysing gas kinematics, we revealed the large-scale shocked PDR and also several dense environments of embedded protostars and outflows. We observe the shocked layer as the most regular structure in the CO(6-5) map and in the velocity space, when the gas around YSOs is dispersed by the outflows.
accepted for publication in MNRAS
References in corpus (17)
- Star formation around RCW 120, the perfect bubble
- Multi-temperature mapping of dust structures throughout the Galactic Plane using the PPMAP tool with Herschel Hi-GAL data
- Compression and ablation of the photo-irradiated cloud the Orion Bar
- PDRs4All: A JWST Early Release Science Program on radiative feedback from massive stars
- SEPIA - a new single pixel receiver at the APEX Telescope
- The ALMA Band 9 receiver - Design, construction, characterization, and first light
- FEEDBACK: a SOFIA Legacy Program to Study Stellar Feedback in Regions of Massive Star Formation
- Mopra CO Observations of the Bubble HII Region RCW120
- Spitzer Mapping of PAHs and H2 in Photodissociation Regions
- Dust dynamics and evolution in expanding HII regions. I. Radiative drift of neutral and charged grains
- Self-absorption in [CII], CO, and HI in RCW120. Building up a geometrical and physical model of the region
- A Near-infrared Survey of UV-excited Molecular Hydrogen in Photodissociation Regions
- Breaking Orion's Veil bubble with fossil outflows
- APEX CO observations towards the photodissociation region of RCW120
- Merged H/H2 and C+/C/CO transitions in the Orion Bar
- The warm-up phase in massive star-forming cores around RCW 120
- The link between gas and stars in the S254-S258 star-forming region