Kleinmann–Low Nebula

The Kleinmann–Low Nebula (also known as the Orion KL Nebula) is an active star forming region in the Milky Way galaxy. It is a cluster of stars within a molecular cloud.[2][3]

Kleinmann–Low Nebula
Nebula
Composite image of the Kleinmann–Low Nebula with ALMA, Gemini and VLT
Observation data: J2000 epoch
Right ascension05h 35m 14.16s[1]
Declination−05° 22′ 21.5″[1]
ConstellationOrion

The Kleinmann–Low Nebula is at the heart of the Orion Nebula, and is the most active star-forming region in it. Because of the thick dust surrounding it, it is observed primarily with infrared light, since visible light cannot pass through it.[2] Hot stellar winds circulate off large, young, stars in Orion's nebula and heat the surrounding gas. This then causes an explosion that has a finger-like intrusion look.[2] It is named after Douglas Kleinmann and Frank J. Low, who discovered the nebula in 1967.[4] Between 1972 and 1973 a large amount of maps were secured with the Steward and Catalina Observatories telescopes.[5]

The luminosity of the Kleinmann–Low Nebula is approximately 3.828×1031 W, or roughly 105 times that of the sun, making the nebula the brightest component of the OMC-1 Complex. The temperature of the dust surrounding the Kleinmann–Low Nebula calculated to be approximately 70 Kelvin. The nebula is estimated to be rather cool at less than 600 Kelvin, yet extremely active when viewed in the far infrared range. Inside of the nebula, the brightest object observed is the Becklin-Neugebauer Object.[4]

The Kleinmann-Low nebula is rich in the molecules HCOOCH3, CH3OCH3 and deuterated methanol, and abundant with nascent stars and planetary systems.[6]

References
  1. "NAME Orion-KL". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 30 July 2017.
  2. Nemiroff, R.; Bonnell, J., eds. (2 March 1999). "The Kleinmann–Low Nebula". Astronomy Picture of the Day. NASA.
  3. Ferland pp191
  4. David Darling. "Kleinmann–Low Nebula". The Internet Encyclopedia of Science. Retrieved 30 July 2017.
  5. Rieke, G. H.; Low, F. J.; Kleinmann, D. E. (1973). "High-Resolution Maps of the Kleinmann-Low Nebula in Orion". The Astrophysical Journal. 186 (1): L7–L11. Bibcode:1973ApJ...186L...7R. doi:10.1086/181346.
  6. Guélin, M.; Wlodarczak, G.; Combes, F.; Favre, C.; Baudry, A.; Peng, T.-C.; Brouillet, N.; Despois, D. (2014). "Complex molecules in the Orion Kleinmann-Low nebula". BIO Web of Conferences. 2: 03006. doi:10.1051/bioconf/20140203006. ISSN 2117-4458.

Bibliography
  • Ferland G. J. Osterbrock Donald E. (2005) Astrophysics of gaseous nebulae and active galactic nuclei University Science Books ISBN 978-1-891389-34-4
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