| NGC 5005 | |
|---|---|
.jpg) NGC 5005 imaged by theHubble Space Telescope | |
| Observation data (J2000epoch) | |
| Constellation | Canes Venatici[1] |
| Right ascension | 13h 10m 56.2648s[2] |
| Declination | +37° 03′ 32.559″[2] |
| Redshift | 0.003156 ± 0.000017 |
| Heliocentric radial velocity | 946 ± 5 km/s[2] |
| Distance | 65.48 ± 3.70 Mly (20.075 ± 1.133 Mpc)[2] |
| Apparent magnitude (V) | 10.6[2] |
| Characteristics | |
| Type | SAB(rs)bc[2] |
| Size | ~125,400 ly (38.46 kpc) (estimated)[2] |
| Apparent size (V) | 5.8′ × 2.8′[2] |
| Other designations | |
| IRAS 13086+3719,UGC 8256,MCG +06-29-052,PGC 45749,CGCG 189-035,C 29[2] | |
NGC 5005, also known asCaldwell 29, is an inclinedspiral galaxy in the constellationCanes Venatici. It was discovered by German-British astronomerWilliam Herschel on 1 May 1785.[3][4] The galaxy has a relatively bright nucleus and a bright disk that contains multiple dust lanes.[5] The galaxy's high surface brightness makes it an object that is visible to amateur astronomers using large amateur telescopes.
Distance measurements for NGC 5005 vary from 13.7megaparsecs (45 millionlight-years) to 34.6 megaparsecs (113 million light-years), averaging about 20 megaparsecs (65 million light-years).[2]
Onesupernova has been observed in NGC 5005: SN 1996ai (Type Ia, mag. 14.5) was discovered by Claudio Bottari on 16 June 1996.[6][7]
NGC 5005 contains alow ionization nuclear emission region (LINER) nucleus.[8] LINER nuclei contain weaklyionized gas. The power source for the LINER emission has been debated extensively, with some researchers suggesting that LINERs are powered byactive galactic nuclei that containsupermassive black holes and other researchers suggesting that LINERs are powered bystar formation activity.
X-ray observations of NGC 5005 have revealed that it contains a variable, point-like hardX-ray source in its nucleus.[9] These results imply that NGC 5005 contains asupermassive black hole. The strong, variable X-ray emission is characteristic of the emission expected from the hot, compressed gas in the environment outside a black hole in anactive galactic nucleus.
NGC 5005 and the nearby spiral galaxyNGC 5033 comprise a physical galaxy pair.[10] The two galaxies weakly influence each other gravitationally, but they are not yet close enough to each other to be distorted by thetidal forces of the gravitational interaction.
Media related toNGC 5005 at Wikimedia Commons
