astro.wikisort.org - NebulaL 1157 is a dark nebula in the constellation Cepheus. It was catalogued in 1962 by U.S. astronomer Beverly T. Lynds in her Catalogue of Dark Nebulae, becoming the 1157th entry in the table; hence the designation.[2] The cloud contains an estimated 3,900 Solar masses of material.[1] It includes protostars that are ejecting material in bipolar outflows, forming bow shocks in the surrounding ambient gas. Formamide and HCNO have been detected in these shocked regions, among other compounds.[3]
Dark nebula in the constellation Cepheus
L 1157Dark nebula |
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Right ascension | 20h 39.5m [1] |
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Declination | +68° 00.7′[1] |
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Distance | 1,400 ly (440[1] pc) |
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Constellation | Cepheus |
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See also: Lists of nebulae |
References
- Kun, M.; et al. (December 2008), Reipurth, Bo (ed.), "Star Forming Regions in Cepheus", Handbook of Star Forming Regions, vol. 1, p. 136, arXiv:0809.4761, Bibcode:2008hsf1.book..136K1
- Lynds, Beverly T. (May 1962), "Catalogue of Dark Nebulae", Astrophysical Journal Supplement, 7: 1, Bibcode:1962ApJS....7....1L, doi:10.1086/190072.
- Mendoza, Edgar; et al. (November 2014), "Molecules with a peptide link in protostellar shocks: a comprehensive study of L1157", Monthly Notices of the Royal Astronomical Society, 445 (1): 151–161, arXiv:1408.4857, Bibcode:2014MNRAS.445..151M, doi:10.1093/mnras/stu1718.
External links
Constellation of Cepheus |
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Stars | |
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Star clusters | |
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Nebulae | |
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Galaxies | |
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