scholarly journals Molecules in the Magellanic Clouds

1991 ◽  
Vol 148 ◽  
pp. 415-420 ◽  
Author(s):  
R. S. Booth ◽  
Th. De Graauw
Keyword(s):  
High Resolution ◽  
Molecular Clouds ◽  
Short Review ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Giant Molecular Clouds ◽  
Interstellar Molecules ◽  
First Time ◽  
Excitation Conditions

In this short review we describe recent new observations of millimetre transitions of molecules in selected regions of the Magellanic Clouds. The observations were made using the Swedish-ESO Submillimetre Telescope, SEST, (Booth et al. 1989), the relatively high resolution of which facilitates, for the first time, observations of individual giant molecular clouds in the Magellanic Clouds. We have mapped the distribution of the emission from the two lowest rotational transitions of 12CO and 13CO and hence have derived excitation conditions for the molecule. In addition, we have observed several well-known interstellar molecules in the same regions, thus doubling the number of known molecules in the Large Magellanic Cloud (LMC). The fact that all the observations have been made under controlled conditions with the same telescope enables a reasonable intercomparison of the molecular column densities. In particular, we are able to observe the relative abundances among the different isotopically substituted species of CO.

On the Mass Spectrum of Giant Molecular Clouds in the Large Magellanic Cloud

2001 ◽  
Vol 53 (6) ◽  
pp. L41-L44 ◽  
Author(s):  
Yasuo Fukui ◽  
Norikazu Mizuno ◽  
Reiko Yamaguchi ◽  
Akira Mizuno ◽  
Toshikazu Onishi
Keyword(s):  
Mass Spectrum ◽  
Molecular Clouds ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Giant Molecular Clouds

scholarly journals Properties of fast winds in hot stars in the Magellanic Clouds

1991 ◽  
Vol 148 ◽  
pp. 360-362
Author(s):  
P. Patriarchi ◽  
M. Perinotto
Keyword(s):  
High Resolution ◽  
Optical Depth ◽  
Transfer Equation ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Small Magellanic Cloud ◽  
Hot Stars ◽  
Exact Integration ◽  
Preliminary Results

We have studied with the SEI method (Sobolev approximation plus Exact Integration of the transfer equation) seven hot stars, five belonging to the Large Magellanic Cloud (LMC) and two to the Small Magellanic Cloud (SMC), which have been observed with IUE in high resolution. We present preliminary results of the work, i.e. the terminal velocities and the optical depth of the P Cygni profile. An evaluation of qiM has been done, as well as a comparison with previous work.

scholarly journals DENSE CLUMPS IN GIANT MOLECULAR CLOUDS IN THE LARGE MAGELLANIC CLOUD: DENSITY AND TEMPERATURE DERIVED FROM13CO(J= 3-2) OBSERVATIONS

2011 ◽  
Vol 141 (3) ◽  
pp. 73 ◽  
Author(s):  
Tetsuhiro Minamidani ◽  
Takanori Tanaka ◽  
Yoji Mizuno ◽  
Norikazu Mizuno ◽  
Akiko Kawamura ◽  
...  
Keyword(s):  
Molecular Clouds ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Giant Molecular Clouds ◽  
Cloud Density

Element abundances from B stars in the Magellanic Clouds

1991 ◽  
Vol 148 ◽  
pp. 388-389 ◽  
Author(s):  
A. Jüttner ◽  
O. Stahl ◽  
B. Wolf ◽  
B. Baschek
Keyword(s):  
High Resolution ◽  
Globular Cluster ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Comparison Star ◽  
Chemical Abundances ◽  
B Stars ◽  
Element Abundances

High resolution spectrograms of B stars in the blue globular cluster NGC 2004, located in the Large Magellanic Cloud (LMC), have been used to derive chemical abundances, differentially with respect to a galactic comparison star.

scholarly journals A COMPARATIVE STUDY OF GIANT MOLECULAR CLOUDS IN M51, M33, AND THE LARGE MAGELLANIC CLOUD

2013 ◽  
Vol 779 (1) ◽  
pp. 46 ◽  
Author(s):  
Annie Hughes ◽  
Sharon E. Meidt ◽  
Dario Colombo ◽  
Eva Schinnerer ◽  
Jerôme Pety ◽  
...  
Keyword(s):  
Comparative Study ◽  
Molecular Clouds ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Giant Molecular Clouds

scholarly journals Giant molecular clouds and star formation in the Large Magellanic Cloud

2006 ◽  
Vol 2 (S237) ◽  
pp. 101-105
Author(s):  
A. Kawamura ◽  
T. Minamidani ◽  
Y. Mizuno ◽  
T. Onishi ◽  
N. Mizuno ◽  
...  
Keyword(s):  
Star Formation ◽  
Molecular Clouds ◽  
Cluster Formation ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Stellar Clusters ◽  
Giant Molecular Clouds ◽  
Surface Mass ◽  
Complete Survey ◽  
Physical Quantities

AbstractIn order to elucidate star formation in the Large Magellanic Cloud, a complete survey of the molecular clouds was carried out by NANTEN. In this work, we compare 230 giant molecular clouds (GMCs), whose physical quantities are well determined, with young clusters and Hii regions. We find that about 76% of the GMCs are actively forming stars or clusters, while 24% show no signs of massive star or cluster formation. Effects of supergiant shells (SGSs) on the formation of GMCs and stars are also studied. The number and surface mass densities of the GMCs are higher by a factor of 1.5–2 at the edge of the SGSs than elsewhere. It is also found that young stellar clusters are more actively formed in the GMCs facing to the center of the SGSs. These results are consistent with the previous studies by Yamaguchi et al. and suggest the formation of GMCs and the cluster is triggered by dynamical effects of the SGSs.

scholarly journals First Results of a CO Survey of the Large Magellanic Cloud with NANTEN; Giant Molecular Clouds as Formation Sites of Populous Clusters

1999 ◽  
Vol 51 (6) ◽  
pp. 745-749 ◽  
Author(s):  
Yasuo Fukui ◽  
Norikazu Mizuno ◽  
Reiko Yamaguchi ◽  
Akira Mizuno ◽  
Toshikazu Onishi ◽  
...  
Keyword(s):  
Molecular Clouds ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Giant Molecular Clouds ◽  
First Results

scholarly journals An observational study of GMCs in the Magellanic Clouds with the ASTE telescope

2008 ◽  
Vol 4 (S256) ◽  
pp. 256-260
Author(s):  
Tetsuhiro Minamidani ◽  
Norikazu Mizuno ◽  
Yoji Mizuno ◽  
Akiko Kawamura ◽  
Toshikazu Onishi ◽  
...  
Keyword(s):  
Star Formation ◽  
Observational Study ◽  
Physical Properties ◽  
Molecular Clouds ◽  
Cluster Formation ◽  
Large Magellanic Cloud ◽  
Magellanic Clouds ◽  
Molecular Gas ◽  
Giant Molecular Clouds ◽  
Evolutionary Sequence

AbstractWe report the results of the submillimeter observations with the ASTE 10 m telescope toward the giant molecular clouds (GMCs) in the Magellanic Clouds to reveal the physical properties of dense molecular gas, the principle sites of star and cluster formation. Six GMCs in the Large Magellanic Cloud have been mapped in the 12CO(J = 3 − 2) transition and 32 clumps are identified in these GMCs at a resolution of 5 pc. These data are combined with 12CO(J = 1 − 0) and 13CO(J = 1 − 0) results and compared with LVG calculations to derive the density and temperature of clumps. The derived density and temperature are distributed in wide ranges. We have made small mapping observations in the 13CO(J = 3 − 2) transition toward 9 representative peak positions of clumps to determine the density and temperature of clumps. These physical properties are constrained well and there are differences in density and temperature among clumps. We suggest that these differences of clump properties represent an evolutionary sequence of GMCs in terms of density increase leading to star formation.

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