NGC 1275

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Galaxy
NGC 1275
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NGC 1275 Hubble.jpg
Photo from the Hubble Space Telescope
AladinLite
Constellation Perseus
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 03 h 19 m 48.1 s
declination + 41 ° 30 ′ 42 ″
Appearance
Morphological type cD; pec; NLRG; Sy2; LEG  
Brightness  (visual) 11.7 mag
Brightness  (B-band) 12.7 mag
Angular expansion 2 ′, 3 × 1 ′, 6
Position angle 110 °
Surface brightness 13.0 mag / arcmin²
Physical data
Affiliation Perseushaufen , Abell 426  
Redshift 0.017559 ± 0.000037  
Radial velocity 5264 ± 11 km / s  
Stroke distance
v rad  / H 0 		(240 ± 17)  x  10 6  ly
(73.5 ± 5.1)  Mpc 
history
discovery Wilhelm Herschel
Discovery date October 17, 1786
Catalog names
NGC  1275 • UGC  2669 • PGC  12429 • CGCG  540-103 • MCG  + 07-07-063 • IRAS  03164 + 4119 • 2MASX  J03194823 + 4130420 • Mrk  1505 • GC  675 • H  II 603 • h  293 • Perseus A • 3C 84 • LDCE 0224 NED202

NGC 1275 (known as Perseus A as a radio source , further as 3C 84 ) is the central galaxy of the Perseus Galaxy Cluster . An extraordinary variety of astrophysical phenomena manifests itself in the galaxy and it has been the subject of a large number of studies. It has been classified as a cooling flow galaxy, an unusual Seyfert type 1 galaxy , a BL Lac object and a LINER galaxy . In addition, it is particularly a strong radio source (FRI radio galaxy ). Their distance from the Milky Way is estimated to be around 240 million light years .

NGC 1275 illustrated

The object was discovered by Wilhelm Herschel on October 17, 1786 .  The supernova SN 1968A (Type I) was observed in NGC 1275 .

In the past ten years, the formation of a new jet around the central supermassive black hole , which weighs two billion solar masses , has been observed from Earth . With the help of the Very Long Baseline Interferometry and the Spektr-R radio satellite from Russia as part of RadioAstron , it is possible to achieve a resolution of around twelve light days (corresponding to a few hundred Schwarzschild radii of the black hole). This made it possible to describe the shape of the jet as cylindrical . For the first time, it has been possible to map the region of origin of a jet from the vicinity of a black hole in detail, and of a relatively young jet (it was restarted around 2008) in contrast to M 87 , the only other galaxy in which the region of origin of a jet was found a high resolution black hole. To the surprise of the scientists involved, it turned out that the jet had a greater expansion than expected at its origin - the popular theory saw it originating directly in the ergosphere of the black hole. Instead, the results speak for a development up to the outer area of ​​the accretion disc .

Web links

Commons : NGC 1275  - collection of images, videos, and audio files

Individual evidence

  1. ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e f SEDS : NGC 1275
  3. ↑ Seligman
  4. ↑ Jan Hattenbach: Surprise in the heart of the monster. Radio astronomers have never observed the core of the black hole in the center of a galaxy more closely than ever. Its high-energy jets may be created differently than expected. In: Spectrum Online. August 3, 2018, accessed August 3, 2018 .
  5. ↑ Deep inside Perseus A , Innovation Report, April 3, 2018
  6. ↑ G. Giovannini, Anton Zensus a. a., A wide and collimated radio jet in 3C84 on the scale of a few hundred gravitational radii, Nature Astronomy, Volume 2, 2018, pp. 472–477, Arxiv