UGC 9618
| Galaxy UGC 9618 |
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|---|---|
.jpg)
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Bear keeper |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 14 h 57 m 00.4 s |
| declination | + 24 ° 36 ′ 44 ″ |
| Appearance | |
| Morphological type | DBL SYS LINER |
| Brightness (B-band) | 14.3 mag |
| Angular expansion | 1.6 ′ × 0.6 ′ |
| Physical data | |
| Redshift | 0.032863 ± 0.000315 |
| Radial velocity | (9852 ± 94) km / s |
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Stroke distance v rad / H 0 |
(444 ± 31) · 10 6 ly (136.0 ± 9.6) Mpc |
| history | |
| Catalog names | |
| UGC 9618 • PGC 53432/53433 • CGCG 134-058 • MCG + 4-35-18 / 19 • IRAS 14547 + 2448 • Arp 302 • VV 340 • KPG 446 | |
UGC 9618 (also VV 340 or Arp 302 ) is an interacting pair of galaxies in the Bear Guardian constellation , about 450 million light years away from the Milky Way . They are two very gas-rich spiral galaxies in an early stage of merging. The galaxy in the edge position is designated VV 340 North, the one in plan view VV 340 South. Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This pair of galaxies belongs to the class Unclassified double galaxies .
In 2011, this pair has been with the Chandra - X-ray telescope observed: Due to the gravitational interaction of the two star systems which accumulations from within them are gas and dust to form a large number of massive blue stars stimulated. This is why the two galaxies also shine so intensely in visible blue light . These stars are so hot that they emit large amounts of X- rays. Since the two galaxies are also very luminous in long-wave infrared light, they are also referred to as "luminous infrared galaxies " (LIRG).
Web links
- Hubble Space Telescope
- astronews.com: Picture of the day March 2, 2012
- 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