This article was accepted into the corpus but its outbound wikilinks were never NER-processed — typical at the deepest BFS hop or when the run's entity cap was reached. No expansion funnel to show.
| Flame Nebula | |
|---|---|
| Name | Flame Nebula |
| Type | Emission nebula |
| Epoch | J2000 |
| Ra | 05h 41m |
| Dec | −02° 27′ |
| Dist | 900 ly |
| Constell | Orion |
| Radius | ~5 ly |
| Other names | NGC 2024, Sh2-277 |
Flame Nebula The Flame Nebula is an emission nebula located in the constellation Orion (constellation), adjacent to the star Alnitak in the Orion Belt. It is cataloged as NGC 2024 and Sharpless 277 and lies within the Orion Molecular Cloud Complex, a prominent site of nearby star formation and molecular gas. The region has been studied across multiple wavelengths by observatories including Palomar Observatory, Spitzer Space Telescope, Hubble Space Telescope, and the Atacama Large Millimeter/submillimeter Array.
The Flame Nebula sits near the easternmost star of the Orion Belt, lying within an extensive dark cloud complex that includes Barnard's Loop, Horsehead Nebula, and Orion Nebula. As an H II region, it glows primarily from hydrogen recombination lines excited by ultraviolet radiation from hot young stars. Its proximity to Earth, at roughly 900 light-years, makes it an accessible target for both professional facilities such as the Very Large Telescope and amateur instruments while also featuring in surveys by missions like WISE and IRAS.
At optical wavelengths the Flame Nebula presents an obscured dark lane caused by dense dust seen against bright emission; infrared imaging from Spitzer Space Telescope and WISE penetrates this dust to reveal embedded clusters. Radio observations with arrays like the VLA and the Atacama Large Millimeter/submillimeter Array trace molecular lines such as CO and NH3, linking to studies by James Clerk Maxwell Telescope and Nobeyama Radio Observatory. X-ray detections by Chandra X-ray Observatory identify young stellar objects and protostellar flares, complementary to ultraviolet data from GALEX and spectroscopic surveys from Keck Observatory and Very Large Telescope instruments.
The nebula is an ionized H II region bounded by a molecular cloud in the Orion B complex; measurements of electron temperature and density derive from spectroscopy carried out at Palomar Observatory and Kitt Peak National Observatory. Mapping of CO isotopologues by the IRAM 30m Telescope and Nobeyama Radio Observatory reveals filamentary molecular structures and clumps that host protostellar cores. Magnetic field studies using polarimetry at James Clerk Maxwell Telescope and SOFIA show ordered field lines influencing gas dynamics, while far-infrared continuum imaging from Herschel Space Observatory constrains dust temperature and mass.
The Flame Nebula formed within a giant molecular cloud in the Perseus Arm of the Milky Way and evolved under feedback from massive stars and external triggers such as shock fronts from nearby OB associations including Orion OB1. Sequential star formation influenced by ionization fronts and radiation-driven implosion is studied in the context of triggered collapse seen in regions like M42 and IC 434. Numerical simulations performed with codes developed at institutions like Max Planck Institute for Astronomy and Harvard–Smithsonian Center for Astrophysics model the interaction of ionizing radiation, stellar winds, and magnetic fields in shaping H II regions.
Embedded clusters within the Flame Nebula host populations of protostars, T Tauri stars, and Herbig Ae/Be candidates identified through infrared excesses in surveys by Spitzer Space Telescope and 2MASS. Spectroscopic follow-up at Keck Observatory and Gemini Observatory classifies pre-main-sequence objects and measures accretion rates via Hα and Brγ emission. Outflows and Herbig–Haro objects associated with protostellar jets are traced by narrowband imaging with Hubble Space Telescope and ground-based facilities such as Subaru Telescope, while millimeter interferometry with ALMA resolves circumstellar disks and dense cores.
The nebula was entered in the New General Catalogue as NGC 2024 after early telescopic descriptions in the 19th century by observers at observatories like Royal Observatory, Greenwich and Birr Castle Observatory. It was later included in the Sharpless catalog as Sh2-277 following photographic Hα surveys led by astronomers affiliated with institutions such as Harvard College Observatory. Modern naming and coordinates are maintained in databases compiled by SIMBAD and the NASA/IPAC Extragalactic Database, and multiwavelength catalogs produced by missions including IRAS and WISE provide cross-identifications used by researchers at European Southern Observatory and Space Telescope Science Institute.
The Flame Nebula appears in astrophotography collections showcased by organizations like the Royal Astronomical Society and publications from Sky & Telescope and Astronomy (magazine). Planetarium shows at institutions such as the Griffith Observatory and American Museum of Natural History feature the Orion region including the nebula, while documentaries produced by broadcasters like the BBC and National Geographic often include imagery of Orion's belt and adjacent nebulae. Popular science books by authors associated with Princeton University Press and Oxford University Press discuss the Flame Nebula in the broader context of nearby star-forming regions.
Category:Emission nebulae Category:Orion Molecular Cloud Complex