Sh2-54 is an extended bright nebula in the constellation of Serpens. [1 ]
In its core there are many
protostars and many infrared sources; some of these sources, like IRAS 18151−1208, are most probably very young high-mass stars. The older star population in this region has an average age of 4-5 millions years, and its components are grouped in the [4 ] open cluster NGC 6604. [2 ]
Sh2-54 belongs to an extended nebulosity that includes also the
Eagle Nebula and the Omega Nebula. The young high-mass stars of this region constitute the Serpens OB1 and Serpens OB2 [5 ] OB association. [2 ]
See also [ edit ]
References [ edit ]
^ a b c d "SIMBAD Astronomical Database". Results for Sh2-54 . Retrieved . 2011-06-05
^ a b c Reipurth, B. (December 2008). "The Young Cluster NGC 6604 and the Serpens OB2 Association". Handbook of Star Forming Regions, Volume II: the Southern Sky 5: 590. Bibcode: 2008hsf2.book..590R.
^ Sharpless, Stewart (December 1959). "A Catalogue of H II Regions". Astrophysical Journal Supplement 4: 257. Bibcode: 1959ApJS....4..257S. doi: 10.1086/190049.
^ Davis, C. J.; Varricatt, W. P.; Todd, S. P.; Ramsay Howat, S. K. (October 2004). "Collimated molecular jets from high-mass young stars: IRAS 18151-1208". Astronomy and Astrophysics 425 (3): 981–995. Bibcode: 2004A&A...425..981D. doi: 10.1051/0004-6361:20041298.
^ Sofue, Y.; Handa, T.; Fuerst, E.; Reich, W.; et al. (1986). "Giant stellar-wind shell associated with the H II region M16". Astronomical Society of Japan 38: 347–360. Bibcode: 1986PASJ...38..347S.
External links [ edit ]
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Coordinates: 18 h 17 m 53 s, −11° 40′ 58″