Astronomy:L1157

From HandWiki
Short description: Dark nebula in the constellation Cepheus
L 1157
Dark nebula
PIA10119.gif
Observation data: J2000 epoch
Right ascension 20h 39.5m[1]
Declination+68° 00.7′[1]
Distance1,400 ly   (440[1] pc)
ConstellationCepheus
See also: Lists of nebulae

L 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]

References

  1. 1.0 1.1 1.2 1.3 Kun, M. et al. (December 2008), Reipurth, Bo, ed., "Star Forming Regions in Cepheus", Handbook of Star Forming Regions 1: p. 136, Bibcode2008hsf1.book..136K1 
  2. Lynds, Beverly T. (May 1962), "Catalogue of Dark Nebulae", Astrophysical Journal Supplement 7: 1, doi:10.1086/190072, Bibcode1962ApJS....7....1L. 
  3. 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, doi:10.1093/mnras/stu1718, Bibcode2014MNRAS.445..151M. 

External links