NGC 1569
| Galaxy NGC 1569 |
|
|---|---|
|
|
| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | giraffe |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 04 h 30 m 49.0 s |
| declination | + 64 ° 50 ′ 53 ″ |
| Appearance | |
| Morphological type | IBm / Sbrst / Sy1 |
| Brightness (visual) | 11.2 mag |
| Brightness (B-band) | 11.8 mag |
| Angular expansion | 3.7 ′ × 1.8 ′ |
| Position angle | 120 ° |
| Surface brightness | 13.1 mag / arcmin² |
| Physical data | |
| Affiliation | Maffei Group , LGG 104 |
| Redshift | −0.000347 ± 0.000013 |
| Radial velocity | (−104 ± 4) km / s |
|
Stroke distance v rad / H 0 |
(1 ± 0) x 10 6 ly (0.34 ± 0.09) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | November 4, 1788 |
| Catalog names | |
| NGC 1569 • UGC 3056 • PGC 15345 • CGCG 306-001 • MCG + 11-06-001 • IRAS 04260 + 6444 • 2MASX J04304918 + 6450525 • Arp 210 • GC 847 • H II 768 • VII Zw 16 | |
NGC 1569 = Arp 210 is an irregular dwarf galaxy of the Hubble-type IBm in the constellation Giraffe in the northern sky, which is an estimated 1 million light-years away from the Milky Way . It is classified as a starburst and a Seyfert galaxy . Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class galaxies with irregularities, absorption and resolution .
A distance measurement based on Hubble Space Telescope data from 2007 corrected the distance by about 4 million light years and showed that NGC 1569 is a member of a group of ten galaxies around IC 342 ( Maffei group ). The gravitational interaction with the other members of the group is considered to be the trigger of the starburst.
The object was discovered on November 4, 1788 by the German-British astronomer William Herschel .
Web links
- Hubble Space Telescope 2008
- Hubble Space Telescope 2004
- Astronews: Dwarf galaxies as a source of oxygen
- Chandra press release (2002)
- astronews.com: Picture of the day June 28, 2016
- ARP ATLAS OF PECULIAR GALAXIES
- Seligman Arp
literature
- Jeff Kanipe and Dennis Webb: The Arp Atlas of Peculiar Galaxies - A Chronicle and Observer's Guide , Richmond 2006, ISBN 978-0-943396-76-7
Individual evidence
- ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d e f SEDS : NGC 1569
- ^ AJ Grocholski et al .: A New Hubble Space Telescope Distance to NGC 1569: Starburst Properties and IC 342 Group Membership . In: Astrophysical Journal . Vol. 686, 2008, pp. L79-L82 , doi : 10.1086 / 592949 , arxiv : 0808.0153 [astro-ph] .
- ↑ Seligman