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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Outflows and bubbles in taurus: Star-formation feedback sufficient to maintain turbulence
Astrophysical Journal, Supplement Series, Volume 219, No. 2, Article 20, Year 2015
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Description
We have identified outflows and bubbles in the Taurus molecular cloud based on the ∼100 deg2 Five College Radio Astronomy Observatory 12CO(1-0) and 13CO(1-0) maps and the Spitzer young stellar object catalogs. In the main 44 deg2 area of Taurus, we found 55 outflows, of which 31 were previously unknown. We also found 37 bubbles in the entire 100 deg2 area of Taurus, none of which had been found previously. The total kinetic energy of the identified outflows is estimated to be erg, which is 1% of the cloud turbulent energy. The total kinetic energy of the detected bubbles is estimated to be erg, which is 29% of the turbulent energy of Taurus. The energy injection rate from the outflows is , which is 0.4-2 times the dissipation rate of the cloud turbulence. The energy injection rate from bubbles is erg s-1, which is 2-10 times the turbulent dissipation rate of the cloud. The gravitational binding energy of the cloud is erg, that is, 385 and 16 times the energy of outflows and bubbles, respectively. We conclude that neither outflows nor bubbles can provide sufficient energy to balance the overall gravitational binding energy and the turbulent energy of Taurus. However, in the current epoch, stellar feedback is sufficient to maintain the observed turbulence in Taurus. © 2015. The American Astronomical Society. All rights reserved..
Authors & Co-Authors
Li, Huixian
China, Beijing
Chinese Academy of Sciences
China, Beijing
University of Chinese Academy of Sciences
Li, D. H.
China, Beijing
Chinese Academy of Sciences
United States, Boulder
Space Science Institute
Qian, Lei
China, Beijing
Chinese Academy of Sciences
Xu, Duo
China, Beijing
Chinese Academy of Sciences
China, Beijing
University of Chinese Academy of Sciences
China, Nanjing
Nanjing University
Goldsmith, Paul F.
United States, Pasadena
California Institute of Technology
Wu, Yuefang
China, Beijing
Peking University
Nan, Rendong
China, Beijing
Chinese Academy of Sciences
Statistics
Citations: 38
Authors: 7
Affiliations: 7
Identifiers
Doi:
10.1088/0067-0049/219/2/20
ISSN:
00670049