Dense cores in the L1630 molecular cloud: discovering new protostars with SCUBA
| Autor: | L. T. Little, A. G. Gibb, Robin R. Phillips |
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| Rok vydání: | 2001 |
| Předmět: |
Physics
Solar mass SIMPLE (dark matter experiment) Molecular cloud Astrophysics (astro-ph) Continuum (design consultancy) Bolometer FOS: Physical sciences Astronomy and Astrophysics Virial mass Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics law.invention Core (optical fiber) Space and Planetary Science law Protostar Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 326:927-936 |
| ISSN: | 1365-2966 0035-8711 |
| Popis: | Maps of the 450 micron and 850 micron dust continuum emission from three star-forming condensations within the Lynds 1630 molecular cloud, made with the SCUBA bolometer array, reveal the presence of four new submillimetre sources, each of a few solar masses, two of which are probably Class I, two Class 0, as well as several sources whose existence was previously known. The sources are located in filaments and appear elongated when observed at 450 microns. They likely have dust temperatures in the range 10 to 20 K, in good agreement with previous ammonia temperature estimates. Attempts to fit their structures with power-law and Gaussian density distributions suggest that the central distribution is flatter than expected for a simple singular isothermal sphere. Although the statistics are poor, our results suggest that the ratio of `protostellar core' mass to total virial mass may be similar for both large and small condensations. 10 pages, 9 figures, uses mn.sty |
| Databáze: | OpenAIRE |
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