Astronomy:NGC 7538
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Short description: Diffuse nebula in the constellation Cepheus
Diffuse nebula | |
---|---|
![]() NGC 7538 Herschel 250 μm = Red, Herschel 160 μm = Green, Herschel 70 μm = Blue [1] | |
Observation data: J2000.0 epoch | |
Subtype | emission or reflection |
Right ascension | 23h 13m 45.7s[2] |
Declination | +61° 28′ 21″[2] |
Distance | 9,100[3] ly (2,800 pc) |
Apparent dimensions (V) | 9′.00 × 6′.0 |
Constellation | Cepheus |
Notable features | Contains largest known protostar |
Designations | Dreyer's Object, Sharpless 158 |
NGC 7538, near the more famous Bubble Nebula, is located in the constellation Cepheus. It is located about 9,100 light-years from Earth. It is home to the biggest yet discovered protostar which is about 300 times the size of the Solar System.[4] It is located in the Perseus Arm of the Milky Way and is probably part of the Cassiopeia OB2 complex.[3] It is a region of active star formation including several luminous near-IR and far-IR sources.[3] Stars in NGC 7538 are mainly low-mass pre-main-sequence stars.[5]
References
- ↑ Fallscheer et al. (2013). "Herschel Reveals Massive Cold Clumps in NGC 7538". Astrophysical Journal 773 (2): 102. doi:10.1088/0004-637x/773/2/102. Bibcode: 2013ApJ...773..102F.
- ↑ 2.0 2.1 "NGC 7538". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+7538.
- ↑ 3.0 3.1 3.2 Balog, Z.; Kenyon, S. J.; Lada, E. A.; Barsony, M. et al. (2004). "A Near-Infrared (JHK) Survey of the Vicinity of the H II Region NGC 7538: Evidence for a Young Embedded Cluster". The Astronomical Journal 128 (6): 2942–2953. doi:10.1086/425548. Bibcode: 2004AJ....128.2942B.
- ↑ Sandell, Göran; Wright, Melvyn (2010). "A Detailed Study of the Accretion Disk Surrounding the High-Mass Protostar NGC 7538 S". The Astrophysical Journal 715 (2): 919–938. doi:10.1088/0004-637X/715/2/919. Bibcode: 2010ApJ...715..919S.
- ↑ Symposium, International Astronomical Union; Union, International Astronomical (2007-05-28). Triggered Star Formation in a Turbulent Interstellar Medium (IAU S237). Cambridge University Press. p. 458. ISBN 978-0-521-86346-9. https://books.google.com/books?id=xLYLTqmoOl0C&pg=PA458.
External links
![]() | Original source: https://en.wikipedia.org/wiki/NGC 7538.
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