Arp 187
Arp 187 is a radio galaxy and merger remnant located in the constellation Eridanus. It is an interacting galaxy pair (MCG-02-13-040).[2] It is included in the Atlas of Peculiar Galaxies in the category galaxies with narrow filaments.
| Arp 187 | |
|---|---|
 Arp 187 by PanSTARRS | |
| Observation data (J2000 epoch) | |
| Constellation | Eridanus |
| Right ascension | 5h 03m 53s [1] |
| Declination | −10° 14′ 51″ [1] |
| Redshift | 12095 ± 45 km/s [1] |
| Apparent magnitude (V) | 15.3 [1] |
| Characteristics | |
| Type | Radio Galaxy [1] |
| Apparent size (V) | 0.8 x 0.6 [1] |
| Other designations | |
| PGC 16691 [1] | |
The galaxy has two prominent radio lobes, however the emission of its AGN in X-ray is low, and so is the thermal output of the AGN torus as observed in infrared, suggesting that it has been quenched. The detection of a narrow line region (with dimensions up to 10 kpc) with still active emission mean that the AGN was still active up to at least 104-5 years ago. In the nucleus of Arp 187 is predicted to lie a supermassive black hole with estimated mass around 6.7 × 108 M☉.[3]
References
- "NASA/IPAC Extragalactic Database". Results for Arp 187. Retrieved 2006-10-26.
- "Simbad". Retrieved 2010-01-06.
- Ichikawa, Kohei; Ueda, Junko; Shidatsu, Megumi; Kawamuro, Taiki; Matsuoka, Kenta (1 February 2016). "Signs of active galactic nucleus quenching in a merger remnant with radio jets". Publications of the Astronomical Society of Japan. 68 (1): 9. arXiv:1510.06037. doi:10.1093/pasj/psv112.
External links
- Arp 187 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- Photo of Arp 187
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