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] |
Apparent size (V) | 3.2 x 0.9 [1] |
Other designations | |
PGC 63571, ESO 142-35 |
NGC 6810 is a spiral galaxy approximately 87 million light-years away from Earth in the constellation of Pavo. [1]
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.
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]
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]
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]
Seyfert galaxies are one of the two largest groups of active galaxies, along with quasar host galaxies. They have quasar-like nuclei with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable.
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NGC 3227 is an intermediate spiral galaxy that is interacting with the dwarf elliptical galaxy NGC 3226. The two galaxies are one of several examples of a spiral with a dwarf elliptical companion that are listed in the Atlas of Peculiar Galaxies. Both galaxies may be found in the constellation Leo. It is a member of the NGC 3227 Group of galaxies, which is a member of the Leo II Groups, a series of galaxies and galaxy clusters strung out from the right edge of the Virgo Supercluster.
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NGC 5643 is an intermediate spiral galaxy in the constellation Lupus. Based on the tip of the red-giant branch distance indicator, it is located at a distance of about 40 million light-years. NGC 5643 has an active galactic nucleus and is a type II Seyfert galaxy.
NGC 2782 is a peculiar spiral galaxy that formed after a galaxy merger in the constellation Lynx. The galaxy lies 75 million light years away from Earth, which means, given its apparent dimensions, that NGC 2782 is approximately 100,000 light years across. NGC 2782 has an active galactic nucleus and it is a starburst and a type 1 Seyfert galaxy. NGC 2782 is mentioned in the Atlas of Peculiar Galaxies in the category galaxies with adjacent loops.
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NGC 7469 is an intermediate spiral galaxy in the constellation of Pegasus. NGC 7469 is located about 200 million light-years away from Earth, which means, given its apparent dimensions, that NGC 7469 is approximately 90,000 light-years across. It was discovered by William Herschel on November 12, 1784.
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NGC 7213 is a lenticular galaxy located in the constellation Grus. It is located at a distance of circa 70 million light-years from Earth, which, given its apparent dimensions, means that NGC 7213 is about 75,000 light-years across. It was discovered by John Herschel on September 30, 1834. It is an active galaxy with characteristics between a type I Seyfert galaxy and LINER.
NGC 7130 is a spiral galaxy located in the constellation Piscis Austrinus. It is located at a distance of about 220 million light years from Earth, which, given its apparent dimensions, means that NGC 7130 is about 100,000 light years across. It was discovered by John Herschel on September 25, 1834, and discovered independently by Lewis Swift on September 17, 1897. The location of the galaxy given in the New General Catalogue was off by 30 arcminutes in declination from the location of the galaxy.
NGC 765 is an intermediate spiral galaxy located in the constellation Aries. It is located at a distance of circa 220 million light years from Earth, which, given its apparent dimensions, means that NGC 765 is about 195,000 light years across. It was discovered by Albert Marth on October 8, 1864. The galaxy has an extensive hydrogen (HI) disk with low surface brightness, whose diameter is estimated to be 240 kpc.
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NGC 7592 is an interacting galaxy system located 300 million light years away in the constellation Aquarius. It was discovered by William Herschel on September 20, 1784. The total infrared luminosity is 1011.33 L☉, and thus it is categorised as a luminous infrared galaxy. One of the galaxies hosts a type 2 Seyfert nucleus.
NGC 7679 is a lenticular galaxy with a peculiar morphology in the constellation Pisces. It is located at a distance of about 200 million light years from Earth, which, given its apparent dimensions, means that NGC 7679 is about 60,000 light years across. It was discovered by Heinrich d'Arrest on September 23, 1864. The total infrared luminosity is 1011.05 L☉, and thus it is categorised as a luminous infrared galaxy. NGC 7679 is both a starburst galaxy and a Seyfert galaxy.
NGC 4593 is a barred spiral galaxy located in the constellation Virgo. It is located at a distance of about 120 million light years from Earth, which, given its apparent dimensions, means that NGC 4593 is about 125,000 light years across. It was discovered by William Herschel on April 17, 1784. It is a Seyfert galaxy.
NGC 7682 is a barred spiral galaxy in the constellation Pisces. It is located at a distance of about 180 million light years from Earth, which, given its apparent dimensions, means that NGC 7682 is about 65,000 light years across. It was discovered by Heinrich d'Arrest on September 23, 1864.
I Zwicky 1, also known as UGC 545, is a galaxy located in the constellation Pisces. It is located 847 million light-years from Earth and is said to be the nearest quasar (QSO) due to its high optical nuclear luminosity of MV = -23.8 mag.
IRAS 19254-7245, more commonly referred as the "Superantennae", are a pair of interacting galaxies located in the constellation of Pavo. It is located 820 million light years from Earth. It is an ultraluminous infrared galaxy and a Seyfert galaxy.