scholarly journals FAR-INFRARED EXTINCTION MAPPING OF INFRARED DARK CLOUDS

2013 ◽  
Vol 780 (2) ◽  
pp. L29 ◽  
Author(s):  
Wanggi Lim ◽  
Jonathan C. Tan
Keyword(s):  
Far Infrared ◽  
Dark Clouds ◽  
Infrared Dark Clouds ◽  
Infrared Extinction

scholarly journals Galactic cold cores

2012 ◽  
Vol 10 (H16) ◽  
pp. 577-578
Author(s):  
M. Juvela ◽  
Keyword(s):  
Star Formation ◽  
Dust Emission ◽  
Far Infrared ◽  
Point Sources ◽  
Interstellar Clouds ◽  
Dark Clouds ◽  
Cloud Cores ◽  
Many Sources ◽  
Cold Dust ◽  
Infrared Dark Clouds

AbstractThe project Galactic Cold Cores is studying the early stages of Galactic star formation using far-infrared and sub-millimetre observations of dust emission. The Planck satellite has located many sources of cold dust emission that are likely to be pre-stellar clumps in interstellar clouds. We have mapped a sample of Planck-detected clumps with the Herschel satellite at wavelengths 100-500 μm. Herschel has confirmed the Planck detections of cold dust and have revealed a significant amount of sub-structure in the clumps. The cloud cores have colour temperatures in the range of 10–15 K. However, star formation is often already in progress with cold clumps coinciding with mid-infrared point sources. In less than half of the cases, the cloud morphology is clearly dominated by filamentary structures. The sources include both nearby isolated globules and more distant, massive clouds that may be off-the-plane counterparts of infrared dark clouds.The Herschel observations have been completed and the processed maps will be released to the community in 2013.

scholarly journals Atomic carbon in an infrared dark cloud

2009 ◽  
Vol 5 (H15) ◽  
pp. 403-403
Author(s):  
Volker Ossenkopf ◽  
Chris W. Ormel ◽  
Robert Simon ◽  
Kefeng Sun ◽  
Jürgen Stutzki
Keyword(s):  
Star Formation ◽  
Massive Star ◽  
Near Infrared ◽  
Far Infrared ◽  
Test Bed ◽  
Dark Cloud ◽  
Dark Clouds ◽  
Infrared Dark Clouds ◽  
Cloud Material

Infrared dark clouds (IRDCs) are potential sites of massive star formation, dark in the near-infrared, but in many cases already with indications of active star-formation from far-infrared and submm observations. They are an ideal test bed to study the role of internal and external heating on the structure of the molecular cloud material.

HOT MOLECULAR CORES IN INFRARED DARK CLOUDS

2011 ◽  
Vol 741 (2) ◽  
pp. 120 ◽  
Author(s):  
J. M. Rathborne ◽  
G. Garay ◽  
J. M. Jackson ◽  
S. Longmore ◽  
Q. Zhang ◽  
...  
Keyword(s):  
Dark Clouds ◽  
Infrared Dark Clouds

SiO as a chemical signature of outflows from bright, compact sources in MSX IR-dark clouds

2004 ◽  
Vol 82 (6) ◽  
pp. 740-743 ◽  
Author(s):  
P A Feldman ◽  
R O Redman ◽  
L W Avery ◽  
J Di Francesco ◽  
J D Fiege ◽  
...  
Keyword(s):  
Star Formation ◽  
Young Stellar Objects ◽  
Line Profiles ◽  
Bipolar Outflows ◽  
Dark Cloud ◽  
Stellar Objects ◽  
Dark Clouds ◽  
Dense Cores ◽  
Infrared Dark Clouds ◽  
Compact Sources

The line profiles of dense cores in infrared-dark clouds indicate the presence of young stellar objects (YSOs), but the youth of the YSOs and the large distances to the clouds make it difficult to distinguish the outflows that normally accompany star formation from turbulence within the cloud. We report here the first unambiguous identification of a bipolar outflow from a young stellar object (YSO) in an infrared-dark cloud, using observations of SiO to distinguish the relatively small amounts of gas in the outflow from the rest of the ambient cloud. Key words: infrared-dark clouds, star formation, bipolar outflows, SiO, G81.56+0.10.

scholarly journals Fire from Ice - Massive Star Birth from Infrared Dark Clouds

2017 ◽  
Vol 13 (S332) ◽  
pp. 139-152
Author(s):  
Jonathan C. Tan
Keyword(s):  
Star Formation ◽  
Massive Star ◽  
Initial Conditions ◽  
Massive Star Formation ◽  
Dark Clouds ◽  
Complex Process ◽  
Infrared Dark Clouds

AbstractI review massive star formation in our Galaxy, focussing on initial conditions in Infrared Dark Clouds (IRDCs), including the search for massive pre-stellar cores (PSCs), and modeling of later stages of massive protostars, i.e., hot molecular cores (HMCs). I highlight how developments in astrochemistry, coupled with rapidly improving theoretical/computational and observational capabilities are helping to improve our understanding of the complex process of massive star formation.

scholarly journals Physical properties of Southern infrared dark clouds

2009 ◽  
Vol 499 (1) ◽  
pp. 149-161 ◽  
Author(s):  
T. Vasyunina ◽  
H. Linz ◽  
Th. Henning ◽  
B. Stecklum ◽  
S. Klose ◽  
...  
Keyword(s):  
Physical Properties ◽  
Dark Clouds ◽  
Infrared Dark Clouds
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