NGC 1275

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NGC 1275
A Hubble Space Telescope (HST) image of NGC 1275. Credit: HST/NASA/ESA/STScI/AURA.
Observation data (J2000 epoch)
Constellation	Perseus
Right ascension	03h 19m 48.1s[1]
Declination	+41° 30′ 42″[1]
Redshift	5264 ± 11 km/s[1]
Distance	235 Mly[citation needed]
Type	cD;pec;NLRG[1]
Apparent dimensions (V)	2′.2 × 1′.7[1]
Apparent magnitude (V)	12.6[1]
Other designations
Perseus A,[1] PGC 12429,[1] UGC 2669[1]
See also: Galaxy, List of galaxies

NGC 1275 is a type 1.5 Seyfert galaxy^[2] located around 235 million light-years away in the direction of the constellation Perseus. NGC 1275 corresponds to the radio galaxy Perseus A and is situated near the centre of the large Perseus Cluster of galaxies.

[edit] Dynamics

NGC 1275 consists of two galaxies, the central CD Galaxy in the Perseus Cluster, and the so-called "high velocity system" (HVS) which lies in front of it. The HVS is moving at 3000 km/s^[3] towards the dominant system, and is believed to be merging with the Perseus Cluster. The HVS is not affecting the CD Galaxy as it lies at least 200 thousand light years from the it^[4]. The central cluster galaxy contains a massive network of spectral line emitting filaments^[5], which appear to be being dragged out by rising bubbles of relativistic plasma generated by the central active galactic nucleus^[6].

[edit] External links

• The NGC 1275 on the WikiSky: DSS2, SDSS, IRAS, Hidrogen α, X-Ray, Astrophoto, Sky Map
• NASA image & description
• Another NASA image, showing unusual gas filaments
• Fabian, A.C., et al. A deep Chandra observation of the Perseus cluster: shocks and ripples. Monthly Notices of the Royal Astronomical Society. Vol. 344 (2003): L43 (arXiv:astro-ph/0306036v2).

[edit] References

1. ^ ^{a b c d e f g h i} NASA/IPAC Extragalactic Database. Results for NGC 3109. Retrieved on 2006-11-19.
2. ^ Ho, Luis C.; Filippenko, Alex V. & Sargent, Wallace L. W. (October 1997), “A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies”, Astrophysical Journal Supplement 112: 315-390 
3. ^ Minkowski R., 1957, in IAU Symp 4, Radio astronomy, p107
4. ^ Gillmon K., Sanders J.S., Fabian A.C., An X-ray absorption analysis of the high-velocity system in NGC 1275, 2004, MNRAS, 348, 159
5. ^ Lynds R., Improved Photographs of the NGC1275 Phenomenon, 1970, ApJ, 159, L151
6. ^ Hatch N.A., Crawford C.S., Johnstone R.M., Fabian A.C.: On the origin and excitation of the extended nebula surrounding NGC1275, 2006, MNRAS, 367, 433