SUBMILLIMETER OBSERVATIONS OF DENSE CLUMPS IN THE INFRARED DARK CLOUD G049.40-00.01
| Autor: | Chao-Wei Tsai, Miju Kang, Jeonghee Rho, Jeong-Eun Lee, Minho Choi, John H. Bieging |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences Star formation Continuum (design consultancy) FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics - Astrophysics of Galaxies 01 natural sciences Stars 13. Climate action Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences High mass Protostar Angular resolution Infrared dark cloud 010303 astronomy & astrophysics 0105 earth and related environmental sciences |
| Zdroj: | The Astrophysical Journal. 743:198 |
| ISSN: | 1538-4357 0004-637X |
| Popis: | We obtained 350 and 850 micron continuum maps of the infrared dark cloud G049.40-00.01. Twenty-one dense clumps were identified within G049.40-00.01 based on the 350 micron continuum map with an angular resolution of about 9.6". We present submillimeter continuum maps and report physical properties of the clumps. The masses of clumps range from 50 to 600 M_sun. About 70% of the clumps are associated with bright 24 micron emission sources, and they may contain protostars. The most massive two clumps show extended, enhanced 4.5 micron emission indicating vigorous star-forming activity. The clump size-mass distribution suggests that many of them are forming high mass stars. G049.40-00.01 contains numerous objects in various evolutionary stages of star formation, from pre-protostellar clumps to HII regions. Comment: 6 pages, 3 figures; accepted for publication in ApJ |
| Databáze: | OpenAIRE |
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