Stellar feedback and triggered star formation in the prototypical bubble RCW 120

被引：37

作者：

Luisi, Matteo ^{[1
,2
]}

Anderson, Loren D. ^{[1
,2
,3
]}

Schneider, Nicola ^{[4
]}

Simon, Robert ^{[4
]}

Kabanovic, Slawa ^{[4
]}

Gusten, Rolf ^{[5
]}

Zavagno, Annie ^{[6
]}

Broos, Patrick S. ^{[7
]}

Buchbender, Christof ^{[4
]}

Guevara, Cristian ^{[4
]}

Jacobs, Karl ^{[4
]}

Justen, Matthias ^{[4
]}

Klein, Bernd ^{[5
]}

Linville, Dylan ^{[1
,2
]}

Rollig, Markus ^{[4
]}

Russeil, Delphine ^{[6
]}

Stutzki, Jurgen ^{[4
]}

Tiwari, Maitraiyee ^{[5
,8
]}

Townsley, Leisa K. ^{[7
]}

Tielens, Alexander G. G. M. ^{[8
,9
]}

机构：

[1] West Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA

[2] West Virginia Univ, Ctr Gravitat Waves & Cosmol, Chestnut Ridge Res Bldg, Morgantown, WV 26505 USA

[3] Green Bank Observ, POB 2, Green Bank, WV 24944 USA

[4] Univ Cologne, Phys Inst, Zulpicher Str 77, D-50937 Cologne, Germany

[5] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[6] Aix Marseille Univ, LAM, CNES, CNRS, Marseille, France

[7] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA

[8] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[9] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

来源：

SCIENCE ADVANCES | 2021年 / 7卷 / 15期

关键词：

H-II REGIONS; HII-REGIONS; SIMULATIONS; EMISSION; DUST; DYNAMICS; LINE; ASSOCIATIONS; METALLICITY; KINEMATICS;

D O I：

10.1126/sciadv.abe9511

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Radiative and mechanical feedback of massive stars regulates star formation and galaxy evolution. Positive feedback triggers the creation of new stars by collecting dense shells of gas, while negative feedback disrupts star formation by shredding molecular clouds. Although key to understanding star formation, their relative importance is unknown. Here, we report velocity-resolved observations from the SOFIA (Stratospheric Observatory for Infrared Astronomy) legacy program FEEDBACK of the massive star-forming region RCW 120 in the [CII] 1.9-THz fine-structure line, revealing a gas shell expanding at 15 km/s. Complementary APEX (Atacama Pathfinder Experiment) CO J = 3-2 345-GHz observations exhibit a ring structure of molecular gas, fragmented into clumps that are actively forming stars. Our observations demonstrate that triggered star formation can occur on much shorter time scales than hitherto thought (< 0.15 million years), suggesting that positive feedback operates on short time periods.

引用

页数：8

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