Becklin–Neugebauer Object

The Becklin–Neugebauer Object (BN) is an object visible only in the infrared in the Orion Molecular Cloud. It was discovered in 1967 by Eric Becklin and Gerry Neugebauer during their near-infrared survey of the Orion Nebula.

Becklin-Neugebauer Object

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Orion
Right ascension	05^h 35^m 14.113^s[1]
Declination	−05° 22′ 22.73″[1]
Characteristics
Spectral type	B[2]
Astrometry
Distance	~1500[3] ly
Details
Mass	7[2] M☉
Other designations
V2254 Ori, 2MASS J05351411-0522227
Database references
SIMBAD	data

The BN Object is thought to be an intermediate-mass protostar. It was the first star detected using infrared methods and is deeply embedded within the Orion star-forming nebula, where it is invisible at optical wavelengths because the light is completely scattered or absorbed due to the high density of dusty material.

References

1. "NAME BN Object". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-11-16.
2. Tan, Jonathan C. (20 May 2004). "The Becklin-Neugebauer Object as a Runaway B Star, Ejected 4000 Years Ago from the θ1 Orionis C System" (PDF). Astrophysical Journal. 607 (1): 47–50. arXiv:astro-ph/0401552. Bibcode:2004ApJ...607L..47T. doi:10.1086/421721. Retrieved 2016-08-21.
3. "The Becklin-Neugebauer Object: Circumstellar Disk Cradles Young Massive Star". Adaptiveoptics.org. 31 August 2005. Retrieved 2016-08-21.

• Becklin-Neugebauer object (Encyclopædia Britannica)
• Hillenbrand, Lynne A; Carpenter, John M.; Skrutskie, M. F. (20 January 2001). "Periodic Photometric Variability in the Becklin-Neugebauer Object" (PDF). Astrophysical Journal. 547 (1): 53–56. arXiv:astro-ph/0010471. Bibcode:2001ApJ...547L..53H. doi:10.1086/318884. Retrieved 2016-08-21.
• Jiang, Zhibo; Tamura, Motohide; Fukagawa, Misato; Hough, Jim; Lucas, Phil; Suto, Hiroshi; Ishii, Miki; Yang, Ji (2005). "A circumstellar disk associated with a massive protostellar object". Nature. 437 (7055): 112–115. Bibcode:2005Natur.437..112J. doi:10.1038/nature04012. PMID 16136137.
• Plambeck, R.L.; Bolatto, A. D.; Carpenter, J. M.; Eisner, J. A.; Lamb, J. W.; Leitch, E. M.; Marrone, D. P.; Muchovej, S. J.; Pérez, L. M.; Pound, M. W.; Teuben, P. J.; Volgenau, N. H.; Woody, D. P.; Wright, M. C. H.; Zauderer, B. A. (2013). "The Ionized Circumstellar Envelopes of Orion Source I and the Becklin-Neugebauer Object". The Astrophysical Journal. 765 (1): 40. arXiv:1211.0085. Bibcode:2013ApJ...765...40P. doi:10.1088/0004-637X/765/1/40.
• Schultz, A. S. B. (2001). "The Secret Inner Life of the Orion Nebula" (PDF). Publications of the Astronomical Society of Australia. 18 (1): 58–63. Bibcode:2001PASA...18...58S. doi:10.1071/AS01009. Retrieved 2016-08-21.
• Tan, Jonathan C. (August 28, 2008). "Astrometry of the Dynamical Ejection of the Becklin-Neugebauer Object from θ Ori C". arXiv:0807.3771 [astro-ph].