Andromeda IV (And IV) - may be the wrong satellite of the Andromeda galaxy (M31); however, it has a higher surface brightness, is smaller in angular size and bluer than other M31 satellites. Therefore, it is more likely that this is not a satellite galaxy at all, but a loosely coupled old star cluster or other background feature (for example, a background galaxy not belonging to the Andromeda subgroup) [2] .
| Andromeda IV | |
|---|---|
| Galaxy | |
 Andromeda IV at about 30 ″ to the right of the star TYC 2801-551-1 (gloss: 10.3 m ); photo from the Hubble telescope. | |
| Research history | |
| Discoverer | Sydney Van Den Berg |
| opening date | 11/3/1971 |
| Designations | |
| Observational data ( Age J2000.0 ) | |
| Constellation | Andromeda |
| Right ascension | |
| Declination | |
| Visible dimensions | 1′.3 × 1′.0 [1] |
| Apparent magnitude m V | 16.6B [1] |
| Specifications | |
| Type of | Dwarf irregular [1] |
| Included in | |
| Redshift | 256 ± 9 km / s [1] |
| The properties | Andromeda Galaxy Satellite |
History
Andromeda IV was discovered in 1971 by Sydney Van den Berg [2] [3] when studying photographic plates taken with a 48-inch (1.2 m) Schmidt telescope at the Palomar Observatory in 1970 and 1971. At the same time, dwarf galaxies of Andromeda I , Andromeda II and Andromeda III (Van den Berg 1972) were discovered (much more pronounced).
Links
- ↑ 1 2 3 4 NASA / IPAC Extragalactic Database . Results for Andromeda IV . Date of treatment March 15, 2007. Archived June 3, 2013.
- ↑ 1 2 Van den Bergh, Sydney. Search for Faint Companions to M31 // The Astrophysical Journal . - IOP Publishing 1972.- January ( vol. 171 ). - P. L31 . - DOI : 10.1086 / 180861 . - .
- ↑ McConnachie, AW; Irwin, MJ; Ferguson, AMN; Ibata, RA; Lewis, GF; Tanvir, N. Distances and metallicities for 17 Local Group galaxies (English) // Monthly Notices of the Royal Astronomical Society : journal. - Oxford University Press , 2005. - Vol. 356 , no. 4 . - P. 979-997 . - DOI : 10.1111 / j.1365-2966.2004.08514.x . - . - arXiv : astro-ph / 0410489 .
- Andromeda IV on WikiSky : DSS2 , SDSS , GALEX , IRAS , H α , X-ray , astrophoto , sky map , articles and images