Flame Nebula

NGC 2024
Emission nebula

The Flame Nebula (NGC 2024) - based on Chandra X-Ray and Spitzer Infrared images.
Observation data: J2000.0 epoch
Right ascension 05h 41m 54s
Declination −1° 51′ 0.0″
Distance 1350[1] ly   (415 pc)
Apparent magnitude (V) +2
Apparent dimensions (V) 30'x30'
Constellation Orion
Physical characteristics
Radius 6 ly
Designations NGC 2024 and Sharpless 277

The Flame Nebula, designated as NGC 2024 and Sh2-277, is an emission nebula in the constellation Orion. It is about 900 to 1,500 light-years away.

The bright star Alnitak (ζ Ori), the easternmost star in the Belt of Orion, shines energetic ultraviolet light into the Flame and this knocks electrons away from the great clouds of hydrogen gas that reside there. Much of the glow results when the electrons and ionized hydrogen recombine. Additional dark gas and dust lies in front of the bright part of the nebula and this is what causes the dark network that appears in the center of the glowing gas. The Flame Nebula is part of the Orion Molecular Cloud Complex, a star-forming region that includes the famous Horsehead Nebula.

At the center of the Flame Nebula is a cluster of newly formed stars,[2] 86% of which have circumstellar disks.[3] X-ray observations by the Chandra X-ray Observatory[4][5] show several hundred young stars, out of an estimated population of 800 stars.[6] X-ray and infrared images indicate that the youngest stars are concentrated near the center of the cluster.[7][8]

Gallery

See also

References

  1. ↑ Meyer, M. R.; et al. (2008). "Star Formation in NGC 2023, NGC 2024, and Southern L1630". In Reipurth, B. Handbook of Star Forming Regions, Volume II: The Southern Sky ASP Monograph Publications. 5. p. 43. ISBN 978-1-58381-670-7.
  2. ↑ Haisch, K. E. Jr.; Lada, E. A.; Lada, C. J. (2000). "A Near-Infrared L-Band Survey of the Young Embedded Cluster NGC 2024". Astronomical Journal. 120 (2): 1396–1409. arXiv:astro-ph/0006219Freely accessible. Bibcode:2000AJ....120.1396H. doi:10.1086/301521.
  3. ↑ Haisch, K. E. Jr.; et al. (2001). "A Mid-Infrared Study of the Young Stellar Population in the NGC 2024 Cluster". Astronomical Journal. 121 (3): 1512–1521. arXiv:astro-ph/0012482Freely accessible. Bibcode:2001AJ....121.1512H. doi:10.1086/319397.
  4. ↑ Skinner, S.; Gagné, M.; Belzer, E. (2003). "A Deep Chandra X-Ray Observation of the Embedded Young Cluster in NGC 2024". Astrophysical Journal. 598 (1): 375–391. arXiv:astro-ph/0306566Freely accessible. Bibcode:2003ApJ...598..375S. doi:10.1086/378085.
  5. ↑ Broos, P. S.; et al. (2013). "Identifying Young Stars in Massive Star-forming Regions for the MYStIX Project". Astrophysical Journal. 209 (2): 32. arXiv:1309.4500Freely accessible. Bibcode:2013ApJS..209...32B. doi:10.1088/0067-0049/209/2/32.
  6. ↑ Kuhn, M. A.; Getman, K. V.; Feigelson, E. D. (2015). "The Spatial Structure of Young Stellar Clusters. II. Total Young Stellar Populations". Astrophysical Journal. 802: 60. arXiv:1501.05300Freely accessible. Bibcode:2015ApJ...802...60K. doi:10.1088/0004-637X/802/1/60.
  7. ↑ Getman, K. V.; Feigelson, E. D.; Kuhn, M. A. (2014). "Core-Halo Age Gradients and Star Formation in the Orion Nebula and NGC 2024 Young Stellar Clusters". Astrophysical Journal. 787 (2): 109. arXiv:1403.2742Freely accessible. Bibcode:2014ApJ...787..109G. doi:10.1088/0004-637X/787/2/109.
  8. ↑ Nemiroff, R.; Bonnell, J., eds. (10 May 2014). "Inside the Flame Nebula". Astronomy Picture of the Day. NASA. Retrieved February 14, 2015.


External links

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Coordinates: 05h 41m 54s, −01° 51′ 00″

This article is issued from Wikipedia - version of the 10/8/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.