N11 (emission nebula)
| Emission nebula | |
|---|---|
| superbubble[citation needed] | |
 An annotated image of N11. Image is from the legacy surveys | |
| Observation data: J2000.0 epoch | |
| Right ascension | 04h 56m 46.2s[1] |
| Declination | −66° 28′ 27″[1] |
| Distance | 160,000[2] ly |
| Constellation | Dorado |
| Physical characteristics | |
| Radius | 500[3] ly |
| Designations | LMC N11, LHA 120-N 11, Bean Nebula |
N11 (also known as LMC N11, LHA 120-N 11) is the brightest emission nebula in the north-west part of the Large Magellanic Cloud in the Dorado constellation.[4] The N11 complex is the second largest H II region of that galaxy, the largest being the Tarantula Nebula. It covers an area approximately 6 arc minutes across.[5] It has an elliptical shape and consists of a large bubble, generally clear interstellar area, surrounded by nine large nebulae.[6] It was named by Karl Henize in 1956.[7]
When close-up, the nebula has pink clouds of glowing gas which resembles candy floss.[7] It has been well studied over the years and extends 1,000 light-years across.[citation needed]
Its particularly notable features include a huge cavity measuring 80 by 60 pc and a five million year old central cluster (NGC 1761). It is surrounded by several ionized clouds where young O stars are forming.[8][9] Several massive stars are within it, including LH 9, LH 10, LH 13, LH 14. It includes a supernova remnant N11L.[10] In the very centre of NGC 1761 is a bright multiple star HD 32228 which contains a rare blue Wolf-Rayet star, type WC5 or WC6, and an O-type bright giant.[11]
Bean Nebula
[edit]The brightest nebulosity within N11 is the northern region N11B (NGC 1763), also known as the Bean Nebula because of its shape.
Other most notable nebulae
[edit]On N11B's north-east edge is the more compact N11A, known as the Rose Nebula, which has rose-like petals of gas and dust and are illuminated due to the massive hot stars within its centre.[12] It is also known as IC 2116 and was catalogued as a star HD 32340.
The east side of the N11 complex is N11C (NGC 1769), an emission nebula containing at least two compact open clusters.[13]
Outside the main "bubble" of N11 to the northeast is N11E, also known as NGC 1773, a small bright nebula containing several massive young stars. The south portion of the bubble is N11F, also called NGC 1760. The western portion of the bubble is faint and poorly-defined.[6]
To the south-west of N11 is the 7th magnitude red giant HD 31754, a foreground star/star system, lying close to our sightline with open cluster NGC 1733. Three farther galaxies visible from most southern deep space telescopes and observatories are west of N11: the pair PGC 16243 and PGC 16244; and LEDA 89996. To the south of them lie NGC 1731 and TYC 8889-619-1[4] which are part of the galaxy's N4 complex. The bright globular cluster NGC 1783 figures to the north of N11.
Gallery
[edit]-
-
Hubble image of a part of NGC 1763 -
Hubble image of NGC 1760 -
Hubble image showing part of NGC 1769 -
N11 with the Spitzer Space Telescope in mid-infrared
.jpg)
References
[edit]- ^ a b "NED results for object LMC:N011". NED. Retrieved 5 November 2017.
- ^ "A Cauldron of Newborn Stars". Sky and Telescope. 23 July 2010. Retrieved 5 November 2017.
- ^ Cavagnaro, Leo. "The Observation of the Second Largest HII Region in the Large Magellanic Cloud". The Extragalactic HII Region N11 and Its Surrounding Field. Archived from the original on 11 November 2017.
- ^ a b "N11 complex in LMC". astronomy and observation. Retrieved 5 November 2017.
- ^ "Hubble view of the huge star formation region N11 in the Large Magellanic Cloud". Space Telescope. 22 June 2010. Retrieved 5 November 2017.
- ^ a b Rosado, M.; Laval, A.; Le Coarer, E.; Georgelin Y., P.; Amram, P.; Marcelin, M.; Goldes, G.; Gach J., L. (1996). "Formation of the nebular complex N11 in the Large Magellanic Cloud". Astronomy and Astrophysics. 308: 588. Bibcode:1996A&A...308..588R.
- ^ a b "Hubble captures bubbles and baby stars". Space Telescope. 22 June 2010. Retrieved 5 November 2017.
- ^ Nowajewsky, P.; Rubio, M. (2006). "IR Study of N11 in the LMC". Revista Mexicana de Astronomía y Astrofísica, Serie de Conferencias. 26: 162. Bibcode:2006RMxAC..26..162N.
- ^ Nowajewsky, P.; Rubio, M.; Barbá, R. (2006). "IR Study of N11 in the LMC". Harvard. 26. Bibcode:2006RMxAC..26..162N.
- ^ Naze, Y; Antokhin, I. I; Rauw, G; Chu, Y. -H; Vreux, J. -M; Vreux, J.-M (2004). "XMM-Newton observations of the giant HII region N11 in the LMC". Astronomy & Astrophysics. 418 (3): 841. arXiv:astro-ph/0402623. doi:10.1051/0004-6361:20035633. S2CID 17722653.
- ^ "Harry Observes the N11 complex in the LMC". MAAS. 16 November 2016. Retrieved 6 November 2017.
- ^ "Hubble Captures Beautiful Baby Stars". Universe Today. 22 June 2010. Retrieved 5 November 2017.
- ^ "Hubble Sees Hidden Treasure in Large Magellanic Cloud". NASA. 23 January 2013. Retrieved 6 November 2017.
