NGC 6810

NGC 6810 is a spiral galaxy approximately 87 million light-years away from Earth in the constellation of Pavo.[1]

NGC 6810
NGC 6810
Observation data (J2000.0 epoch)
ConstellationPavo
Right ascension19h 43m 34.25s [1]
Declination−58° 39′ 20.12″ [1]
Redshift0.006775 [1]
Helio radial velocity2031 ± 10 km/s [1]
Distance87 Mly [1]
Apparent magnitude (V)11.60 [2]
Apparent magnitude (B)12.40 [2]
Characteristics
TypeSA(s)ab:sp [1]
Apparent size (V)3.2 x 0.9 [1]
Other designations
PGC 63571, ESO 142-35

Observational history

NGC 6810 was discovered by John Herschel on July 10, 1834.[3] It was later added to the New General Catalogue by John Louis Emil Dreyer.

Misclassification of NGC 6810

This galaxy used to be classified as a Seyfert 2 galaxy, but that is probably incorrect.[4] Recent X-ray observations provide no evidence of any active galactic nucleus (AGN) activity,[4] and high resolution optical spectra do not confirm the status of NGC 6810 as a Seyfert galaxy, thus it appears to have been misclassified.[4] [5]

Features

NGC 6810 is an early-type spiral of roughly equivalent mass to the Milky Way.[4] X-ray, optical, IR and radio properties of NGC 6810 are all consistent with a starburst galaxy.[4]

Galactic-scale superwind

Observation of NGC 6810 with XMM-Newton reveals the presence of extended soft X-ray emission within the optical disc of the galaxy (which is closely associated with star-forming regions) and also beyond the optical disc.[4] This, along with Hα filamentation and peculiar minor axis ionized gas kinematics, strongly suggest that NGC 6810 is host to a galactic-scale superwind[4] which is streaming from the starburst region.[6]

The actively star-forming regions and the base radius of the outflow are unusually spread out, and extend out to a radius of ∼6.5 kpc from the nucleus. Most superwinds in other galaxies appear to arise in ≲ 1 kpc-scale nuclear starburst regions.[4] That makes NGC 6810 one of the few ‘disc-wide’ superwinds currently known,[4] because NGC 6810's superwind base extends across nearly 70 percent of the entire galaxy's diameter.[6] Only three other starburst galaxies are known to have broad superwind sources.[6]

See also

References
  1. "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 28 November 2017.
  2. "Revised NGC Data for NGC 6810". spider.seds.org. Retrieved December 9, 2017.
  3. "Data for NGC 6810". www.astronomy-mall.com. Retrieved December 9, 2017.
  4. Strickland, David K. (2007). "A new superwind galaxy: XMM–Newton observations of NGC 6810". Monthly Notices of the Royal Astronomical Society. 376 (2): 523–533. arXiv:astro-ph/0701630. Bibcode:2007MNRAS.376..523S. doi:10.1111/j.1365-2966.2007.11478.x.
  5. Forbes, Duncan A.; Norris, R. P. (1998). "Star Formation in Southern Seyfert Galaxies". Monthly Notices of the Royal Astronomical Society. 300 (3): 757. arXiv:astro-ph/9804298. Bibcode:1998MNRAS.300..757F. doi:10.1046/j.1365-8711.1998.01940.x. Retrieved 3 December 2017.
  6. "Blowin' in the galactic superwind". www.astronomy.com. Retrieved 3 December 2017.
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