NGC 6810
Galaxy in the constellation of Pavo
From Wikipedia, the free encyclopedia
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) | |
| Constellation | Pavo |
| Right ascension | 19h 43m 34.25s [1] |
| Declination | −58° 39′ 20.12″ [1] |
| Redshift | 0.006775 [1] |
| Heliocentric radial velocity | 2031 ± 10 km/s [1] |
| Distance | 87 Mly[1] |
| Apparent magnitude (V) | 11.60 [2] |
| Apparent magnitude (B) | 12.40 [2] |
| Characteristics | |
| Type | SA(s)ab:sp [1] |
| Size | 53.42 kpc (174,200 ly) (diameter; 25.0 mag/arcsec2 B-band isophote) [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]
