THE PdBI ARCSECOND WHIRLPOOL SURVEY (PAWS): ENVIRONMENTAL DEPENDENCE OF GIANT MOLECULAR CLOUD PROPERTIES IN M51
THE PdBI ARCSECOND WHIRLPOOL SURVEY (PAWS): ENVIRONMENTAL DEPENDENCE OF GIANT MOLECULAR CLOUD PROPERTIES IN M51
复制标题
PdBI 弧秒漩涡调查 (PAWS):M51 中巨分子云特性的环境依赖性
DOI:
10.1088/0004-637x/784/1/3
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Schinnerer
中科院分区:
文献类型:
--
作者:
Colombo;Hughes;Schinnerer
Using data from the PdBI Arcsecond Whirlpool Survey (PAWS), we have generated the largest extragalactic giant molecular cloud (GMC) catalog to date, containing 1507 individual objects. GMCs in the inner M51 disk account for only 54% of the total 12 CO (1–0) luminosity of the survey, but on average they exhibit physical properties similar to Galactic GMCs. We do not find a strong correlation between the GMC size and velocity dispersion, and a simple virial analysis suggests that∼ 30% of GMCs in M51 are unbound. We have analyzed the GMC properties within seven dynamically motivated galactic environments, finding that GMCs in the spiral arms and in the central region are brighter and have higher velocity dispersions than inter-arm clouds. Globally, the GMC mass distribution does not follow a simple power-law shape. Instead, we find that the shape of the mass distribution varies with galactic environment: the distribution is steeper in inter-arm region than in the spiral arms, and exhibits a sharp truncation at high masses for the nuclear bar region. We propose that the observed environmental variations in the GMC properties and mass distributions are a consequence of the combined action of large-scale dynamical processes and feedback from high-mass star formation. We describe some challenges of using existing GMC identification techniques for decomposing the 12 CO (1–0) emission in molecule-rich environments, such as M51's inner disk.
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影响因子:
64.8
作者:
D. Zaritsky;H. Rix;M. Ricke
通讯作者:
M. Ricke
DOI:
10.1086/183042
发表时间:
1979
期刊:
The Astrophysical Journal
影响因子:
--
作者:
P. Solomon;D. B. Sanders;N. Scoville
通讯作者:
N. Scoville
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
C. Dobbs;J. Pringle
通讯作者:
J. Pringle
DOI:
10.1111/j.1365-2966.2012.21558.x
发表时间:
2012
影响因子:
4.8
作者:
C. Dobbs;J. Pringle;Andreas Burkert
通讯作者:
Andreas Burkert
DOI:
10.1046/j.1365-8711.2001.04777.x
发表时间:
2001-06
影响因子:
4.8
作者:
J. Pringle;R. Allen;S. Lubow
通讯作者:
J. Pringle;R. Allen;S. Lubow