NGC 871 | |
---|---|
Observation data (J2000 epoch) | |
Constellation | Aries [1] |
Right ascension | 02h 17m 10.7s [1] |
Declination | +14° 32′ 53″ [1] |
Redshift | +0.012475±0.000003 [1] |
Heliocentric radial velocity | 3740 ± 1 km/s [1] |
Distance | 52,2 ± 3,7 (170 ± 12)×106 ly) [1] |
Apparent magnitude (V) | 13.4 mag [1] |
Apparent magnitude (B) | 14.1 mag [1] |
Characteristics | |
Type | SB(s)c: [1] |
Other designations | |
NGC 0871 • UGC 1759 • PGC 8722 • CGCG 438-046 • MCG -02-06-053 • IRAS 02144+1419 • 2MASX J02171073+1432521 • CN 513 |
NGC 871 is a barred spiral galaxy in the Aries constellation. [1] Its discovery and first description was realized by William Herschel on October 14, 1784 [2] and the findings made public through his Catalogue of Nebulae and Clusters of Stars in 1786.
By using the galaxies' radial velocities and distances as a grouping factor, astronomers assign this galaxy to LGG (Lyon Groups of Galaxies) 53 along with 8 other members (UGC 1693, UGC 1761, NGC 876, NGC 877, UGC 1817, IC 1791 and UGC 1773). [3] [4]
At the current epoch, most galaxies can be found in medium-density group environments, where tidal interactions play an important role in galactic evolution. Several nearby, gas-rich groups exhibit clear signs of these interactions, giving the opportunity for scientists to study how galaxies are formed and interact with each other. [5]
In 2012 astronomers conducted an extensive survey to measure the Hl emissions from NGC 871 and other galaxies in LGG 53, using the Giant Metrewave Radio Telescope and Canada–France–Hawaii Telescope. This galaxy group first attracted attention due to its gas-rich interaction as well as harboring AGC (Arecibo General Catalog) 749170, a galaxy with a mass of ~×109.3 M☉. This group resides in a common HI distribution with a total HI mass of Mhl 6 x 10×1010 M☉. Such a massive structure is very rare in the local Universe (galaxies with a Mhl > ×1010 M☉ represents less 2 per cent of cases) and each large spiral in NGC 871/6/7 seems to exceeds this value. [5]
The study suggests seven of the eight gas-rich detections (three spirals and four dwarfs) contain stellar components and appear to be standard dark-matter dominated galaxies that were built during the epoch of galaxy assembly. AGC 749170 however is probably the result of major mergers and very active tidal interaction, resulting in the massive structure we can observe today. [5]
The M81 Group is a galaxy group in the constellations Ursa Major and Camelopardalis that includes the galaxies Messier 81 and Messier 82, as well as several other galaxies with high apparent brightnesses. The approximate center of the group is located at a distance of 3.6 Mpc, making it one of the nearest groups to the Local Group. The group is estimated to have a total mass of ×1012M☉. The M81 Group, the Local Group, and other nearby groups all lie within the Virgo Supercluster.
NGC 4216 is a metal-rich intermediate spiral galaxy located not far from the center of the Virgo Cluster of galaxies, roughly 55 million light-years away. It was discovered by German-British astronomer William Herschel on 17 April 1784.
NGC 5112 is a barred spiral galaxy in the constellation Canes Venatici. It was discovered on 17 March 1787 by German-British astronomer William Herschel. This galaxy is in close physical proximity to the edge-on dwarf spiral NGC 5107.
NGC 3504 is a barred spiral galaxy in the constellation Leo Minor. It has a Hubble distance corresponding to 88 million light-years and was discovered by William Herschel in 1785.
NGC 266 is a massive barred spiral galaxy in the constellation Pisces. NGC 266 is located at a distance of 197 megalight-years from the Milky Way. It was discovered on September 12, 1784, by William Herschel. The form of this barred galaxy is described by its morphological classification of SB(rs)ab, which indicates a quasi-ring-like structure (rs) and moderate-to-tightly wound spiral arms (ab).
NGC 1060 is a lenticular galaxy approximately 256 million light-years away from Earth in the constellation of Triangulum. It was discovered by William Herschel on September 12, 1784.
NGC 4660 is an elliptical galaxy located about 63 million light-years away in the constellation Virgo. The galaxy was discovered by astronomer William Herschel on March 15, 1784 and is a member of the Virgo Cluster.
NGC 612 is a lenticular galaxy in the constellation of Sculptor located approximately 388 million light-years from Earth. It is a type II Seyfert galaxy and thus has an active galactic nucleus. NGC 612 has been identified as an extremely rare example of a non-elliptical radio galaxy, hosting one of the nearest powerful FR-II radio sources.
NGC 681 is an intermediate spiral galaxy in the constellation of Cetus, located approximately 66.5 million light-years from Earth.
NGC 536 is a barred spiral galaxy located in the constellation Andromeda. It is located at a distance of circa 200 million light-years from Earth, which, given its apparent dimensions, means that NGC 536 is about 180,000 light years across. It was discovered by William Herschel on September 13, 1784. It is a member of Hickson Compact Group 10, which also includes the galaxies NGC 529, NGC 531, and NGC 542. It belongs to the Perseus–Pisces Supercluster.
NGC 759 is an elliptical galaxy located 230 million light-years away in the constellation Andromeda. NGC 759 was discovered by astronomer by Heinrich d'Arrest on September 17, 1865. It is a member of Abell 262.
NGC 877 is an intermediate spiral galaxy located in the constellation Aries. It is located at a distance of circa 160 million light years from Earth, which, given its apparent dimensions, means that NGC 877 is about 115,000 light years across. It was discovered by William Herschel on October 14, 1784. It interacts with NGC 876.
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.
NGC 4294 is a barred spiral galaxy with flocculent spiral arms located about 55 million light-years away in the constellation Virgo. The galaxy was discovered by astronomer William Herschel on March 15, 1784 and is a member of the Virgo Cluster.
NGC 4298 is a flocculent spiral galaxy located about 53 million light-years away in the constellation Coma Berenices. The galaxy was discovered by astronomer William Herschel on April 8, 1784 and is a member of the Virgo Cluster.
NGC 4299 is a featureless spiral galaxy located about 55 million light-years away in the constellation Virgo. It was discovered by astronomer William Herschel on March 15, 1784 and is a member of the Virgo Cluster.
NGC 2293 is a lenticular galaxy located in the constellation Canis Major. It is located at a distance of circa 100 million light years from Earth, which, given its apparent dimensions, means that NGC 2293 is about 160,000 light years across. It was discovered by John Herschel on January 20, 1835. NGC 2293 forms a pair with NGC 2292 and has an HI ring that surrounds both galaxies.
NGC 4324 is a lenticular galaxy located about 85 million light-years away in the constellation Virgo. It was discovered by astronomer Heinrich d'Arrest on March 4, 1862. NGC 4324 has a stellar mass of 5.62 × 1010M☉, and a baryonic mass of 5.88 × 1010M☉. The galaxy's total mass is around 5.25 × 1011M☉. NGC 4324 is notable for having a ring of star formation surrounding its nucleus. It was considered a member of the Virgo II Groups until 1999, when its distance was recalculated and it was placed in the Virgo W Group.
NGC 5953 is a peculiar spiral galaxy in the constellation Serpens. The galaxy lies about 80 million light years away from Earth, which means, given its apparent dimensions, that NGC 5953 is approximately 35,000 light years across. It was discovered by William Herschel on April 17, 1784. NGC 5953 interacts with NGC 5954 forming a pair known as Arp 91.
NGC 3447 is a barred Magellanic spiral galaxy located in the constellation Leo. Its speed relative to the cosmic microwave background is 1,405 ± 34 km/s, which corresponds to a Hubble distance of 20.7 ± 1.5 Mpc. It was discovered by the British astronomer John Herschel in 1836.