NGC 5544/5
| Galaxy arp 199 |
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|---|---|
 |
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| Image taken with the 81 cm reflector telescope of the Mount Lemmon Observatoryr : right NGC 5544, left NGC 5545 (not north) | |
| AladinLite | |
| Constellation | Bear keeper |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 14 h 17 m 03.8 s |
| declination | + 36 ° 34 ′ 24 ″ |
| Appearance | |
| Morphological type | (R) SB (rs) 0 / a (NGC 5544) SA (s) bc: (NGC 5545) |
| Brightness (visual) | 13.3 (NGC 5544) mag 15.0 (NGC 5545) mag |
| Brightness (B-band) | 14.2 (NGC 5544) mag 15.8 (NGC 5545) mag |
| Angular expansion | 1.1 '× 1.0' (NGC 5544) 1.0 '× 0.3' (NGC 5545) |
| Position angle | 62 ° (NGC 5544) 58 ° (NGC 5545) |
| Surface brightness | 13.3 (NGC 5544) mag / arcmin² 13.5 (NGC 5545) mag / arcmin² |
| Physical data | |
| Affiliation | LGG 378 |
| Redshift | 0.010140 ± 0.000057 0.010270 ± 0.000033 |
| Radial velocity | (3040 ± 17) km / s (3079 ± 10) km / s |
|
Stroke distance v rad / H 0 |
(140 ± 10) x 10 6 ly (42.8 ± 3.0) Mpc |
| history | |
| discovery | William Herschel Bindon Blood Stoney |
| Discovery date | May 1, 1785 April 10, 1854 |
| Catalog names | |
| NGC 5544/5 • UGC 9142/3 • PGC 51018/23 • CGCG 191-073 • MCG + 06-31-90 / 91 • Arp 199 • VV 210 • GC 3833 • H II 419 • h 1771 • KPG 422 | |
NGC 5544/5 , NGC 5544/45 or Arp 199 , is an interacting pair of two spiral galaxies in the constellation Bootes . The galaxy nuclei are separated by 0 ′, 6. NGC 5545 is located to the east of NGC 5544 and is observed on the edge, running from east-northeast to west-southwest, while the inclination of NGC 5544 is low. Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class of galaxies with matter ejected from the nucleus .
William Herschel observed the object on May 1, 1785. Based on his description, it can be assumed that Herschel observed both components. The resulting NGC entry with number 5544 refers to the western of the two galaxies, while the eastern component was to be given a separate number later than 5545. The latter entry is based on an observation by Bindon Blood Stoney on April 10, 1852.
swell
- В. П. Решетников, Л. Н. Сазонова; Письма в Астрономический журнал 19 (8), pp. 708–718 (1993)
- Domingue et al .: "Dust in Spiral Galaxies: Comparing Emission and Absorption to Constrain Small-Scale and Very Cold Structures"; in: The Astronomical Journal 118 (4), pp. 1542-1550 (1999)
- van Driel et al .: “HI observations of loose galaxy groups. I. Data and global properties "; Astronomy and Astrophysics, 378, pp. 370-393 (2001)
Web links
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