Cluster formation and molecular cloud cores in the Magellanic Clouds
نویسندگان
چکیده
منابع مشابه
Molecular abundances in the Magellanic Clouds I. A multiline study of five cloud cores?
Nine H ii regions of the LMC were mapped in 13CO(1–0) and three in 12CO(1–0) to study the physical properties of the interstellar medium in the Magellanic Clouds. For N113 the molecular core is found to have a peak position which differs from that of the associatedH ii regionby20′′. Toward this molecular core the 12CO and 13CO peak TMB line temperatures of 7.3K and 1.2K are the highest so far f...
متن کاملMolecular Cloud Structure in the Magellanic Clouds: Effect of Metallicity
The chemical structure of neutral clouds in low metallicity environments is examined with particular emphasis on the H to H2 and C + to CO transitions. We observed near-IR H2 (1,0) S(1), (2,1) S(1), and (5,3) O(3) lines and the CO J = 1→ 0 line from 30 Doradus and N159/N160 in the Large Magellanic Cloud and from DEM S 16, DEM S 37, and LI-SMC 36 in the Small Magellanic Cloud. We find that the H...
متن کاملMolecular Cloud Structure in the Magellanic Clouds : E ect
The chemical structure of neutral clouds in low metallicity environments is examined with particular emphasis on the H to H 2 and C + to CO transitions. We observed We nd that the H 2 emission is UV-excited and that (weak) CO emission always exists (in our surveyed regions) toward positions where H 2 and C II] emission have been detected. Using a PDR code and a radiative transfer code, we simul...
متن کاملMolecular Clouds Towards RCW49 and Westerlund 2; Evidence for Cluster Formation Triggered by Cloud-Cloud Collision
We have made CO(J = 2− 1) observations towards the HII region RCW 49 and its ionizing source, the rich stellar cluster Westerlund 2, with the NANTEN2 sub-mm telescope. These observations have revealed that two molecular clouds in velocity ranges of −11 to +9 km s and 11 to 21 km s respectively, show remarkably good spatial correlations with the Spitzer IRAC mid-infrared image of RCW 49, as well...
متن کاملCluster Formation in Contracting Molecular Clouds
We explore, through a simplified, semianalytic model, the formation of dense clusters containing massive stars. The parent cloud spawning the cluster is represented as an isothermal sphere. This sphere is in nearYforce balance between self-gravity and turbulent pressure. Self-gravity, mediated by turbulent dissipation, drives slow contraction of the cloud, eventually leading to a sharp central ...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2005
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921305004709