Arp 270
| Galaxy NGC 3395 + 3396 |
|
|---|---|
|
|
| SDSS image from Arp 270 | |
| AladinLite | |
| Constellation | Little lion |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 10 h 49.9 m |
| declination | + 32 ° 59.2 ′ |
| Appearance | |
| Morphological type | SAB (rs) cd pec: IBm pec |
| Brightness (visual) | 11.8 (NGC 3395) 12 (NGC 3396) mag |
| Brightness (B-band) | 12.5 (NGC 3395) 12.6 (NGC 3396) mag |
| Angular expansion | 2.1 / 1.1 (NGC 3395) 2.9 / 1.2 (NGC 3396) |
| Position angle | 50 ° (NGC 3395) 100 ° (NGC 3396) |
| Surface brightness | 12.6 (NGC 3395) 13.2 (NGC 3396) mag / arcmin² |
| Physical data | |
| Affiliation | HOLM 215 |
| Redshift | 0.005420 ± 0.000033 |
| Radial velocity | 1625 ± 10 km / s |
|
Stroke distance v rad / H 0 |
(72 ± 5) · 10 6 ly (22 ± 1.5) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | December 7, 1785 |
| Catalog names | |
| NGC 3395 • NGC 3396 • IC 2613 (NGC 3395) • UGC 5931/5 • PGC 32424/32434 • CGCG 184-018 / 9 • MCG + 06-24-017 / 8 • Arp 270 • VV 246 • GC 2216/2217 • H I 116 / I 117 • h 765/766 • LDCE 0755 NED003 / 4 | |
Arp 270 or NGC 3395/3396 is an interacting pair of galaxies in the constellation Leo Minor and about 72 million light-years from the Milky Way. Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This pair of galaxies belongs to the class double galaxies with linked arms .
Both objects were discovered by Wilhelm Herschel on December 7, 1785 . The southern arm of the galaxy NGC 3395 received its own entry in the index catalog ( IC 2605 ), which the astronomer Guillaume Bigourdan observed on April 11, 1899.
literature
- Zasov et al. (2015): Outer regions of the merging system Arp 270 ; Monthly Notices of the Royal Astronomical Society 449 (2), pp. 1605-1613
- Zaragoza-Cardiel et al. (2013): Kinematics of Arp 270: gas flows, nuclear activity and two regimes of star formation ; Monthly Notices of the Royal Astronomical Society 432 (2), pp. 998-1009
- Brassington, Nicola J .; Read, Andrew M .; Ponman, Trevor J. (2005): Chandra observations of the interacting galaxies NGC 3395/3396 (Arp 270) ; Monthly Notices of the Royal Astronomical Society 360 (3), pp. 801-815
- 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
Web links
Commons : Arp 270 - collection of images, videos and audio files
