Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'504'928
Articles rated: 2609

25 April 2024

» arxiv » 0710.4202

Article overview

Sub-millimeter Observations of Giant Molecular Clouds in the Large Magellanic Cloud: Temperature and Density as Determined from J=3-2 and J=1-0 transitions of CO
T. Minamidani ; N. Mizuno ; Y. Mizuno ; A. Kawamura ; T. Onishi ; T. Hasegawa ; K. Tatematsu ; M. Ikeda ; Y. Moriguchi ; N. Yamaguchi ; J. Ott ; T. Wong ; E. Muller ; J. L. Pineda ; A. Hughes ; L. Staveley-Smith ; U. Klein ; A. Mizuno ; S. Nikolić ; R. S. Booth ; A. Heikkilä ; L.-A. Nyman ; M. Lerner ; G. Garay ; S. Kim ; M. Fujishita ; T. Kawase ; M. Rubio ; Y. Fukui ;
Date:	23 Oct 2007
Abstract:	We have carried out sub-mm 12CO(J=3-2) observations of 6 giant molecular clouds (GMCs) in the Large Magellanic Cloud (LMC) with the ASTE 10m sub-mm telescope at a spatial resolution of 5 pc and very high sensitivity. We have identified 32 molecular clumps in the GMCs and revealed significant details of the warm and dense molecular gas with n(H2) $sim$ 10$^{3-5}$ cm$^{-3}$ and Tkin $sim$ 60 K. These data are combined with 12CO(J=1-0) and 13CO(J=1-0) results and compared with LVG calculations. We found that the ratio of 12CO(J=3-2) to 12CO(J=1-0) emission is sensitive to and is well correlated with the local Halpha flux. We interpret that differences of clump propeties represent an evolutionary sequence of GMCs in terms of density increase leading to star formation.Type I and II GMCs (starless GMCs and GMCs with HII regions only, respectively) are at the young phase of star formation where density does not yet become high enough to show active star formation and Type III GMCs (GMCs with HII regions and young star clusters) represents the later phase where the average density is increased and the GMCs are forming massive stars. The high kinetic temperature correlated with Halpha flux suggests that FUV heating is dominant in the molecular gas of the LMC.
Source:	arXiv, 0710.4202
Services:	Forum \| Review \| PDF \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap