TY - JOUR

T1 - The shocked molecular layer in RCW 120

AU - Kirsanova, M. S.

AU - Pavlyuchenkov, Ya. N.

AU - Olofsson, A. O. H.

AU - Semenov, D. A.

AU - Punanova, A F

N1 - MSK and Ya. NP were supported by RSCF, project number 21-12-00373. DAS acknowledges financial support by the Deutsche Forschungsgemeinschaft through SPP 1833: ‘Building a Habitable Earth’ (SE 1962/6-1). AFP acknowledges the support of the Russian Ministry of Science and Education via the State Assignment Contract number FEUZ-2020-0038. Based on observations with the Atacama Pathfinder Experiment(APEX)telescope. APEX is a collaboration between the Max Planck Institute for Radio Astronomy, the European Southern Observatory, and the Onsala Space Observatory. Swedish observations on APEX are supported through Swedish Research Council grant number 2017-00648. We are thankful to S. V. Salii and K. V. Plakitina for fruitful discussions. We also thank unknown referee for his/her very relevant comments. Based on observations with the Atacama Pathfinder Experiment (APEX) telescope. APEX is a collaboration between the Max Planck Institute for Radio Astronomy, the European Southern Observatory, and the Onsala Space Observatory. Swedish observations on APEX are supported through Swedish Research Council grant number 2017-00648. MSK and Ya. NP were supported by RSCF, project number 21-12-00373. DAS acknowledges financial support by the Deutsche Forschungsgemeinschaft through SPP 1833: ‘Building a Habitable Earth’ (SE 1962/6-1). AFP acknowledges the support of the Russian Ministry of Science and Education via the State Assignment Contract number FEUZ-2020-0038.

PY - 2023

Y1 - 2023

N2 - Expansion of wind-blown bubbles or H ii 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 photo-dissociation region (PDR) and nearby molecular gas with CO(6-5) and (CO)-C-13(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 H ii 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 Young stellar objects (YSOs) is dispersed by the outflows.

AB - Expansion of wind-blown bubbles or H ii 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 photo-dissociation region (PDR) and nearby molecular gas with CO(6-5) and (CO)-C-13(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 H ii 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 Young stellar objects (YSOs) is dispersed by the outflows.

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UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85161497689

U2 - 10.1093/mnras/stac3737

DO - 10.1093/mnras/stac3737

M3 - Article

VL - 520

SP - 751

EP - 760

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 1

ER -