H1821+643
Sign in to saveH1821+643 is an extraordinarily luminous, radio-quiet quasar in the constellation of Draco.
Wikidata facts
- Image
- H1821+643.jpg
Show 8 more facts
- redshift
- 0.297000
- epoch
- J2000.0
- declination
- 64.34339611
- right ascension
- 275.48848542
- catalog code
- PBC J1821.5+6421
- apparent magnitude
- 14.24
- radial velocity
- 76251
- Commons category
- H1821+643
via Wikidata · CC0
~2 min read
Encyclopedic overview
4 sectionsContents
- Supermassive black hole
- Footnotes
- References
- External links
H1821+643 is an extraordinarily luminous, radio-quiet quasar in the constellation of Draco.
The associated Active Galactic Nucleus (AGN) is situated in the Brightest Central Galaxy (BCG) of a massive (\sim 6.3 \times 10^{14} M_\odot), strong cooling flow cluster, CL 1821+64. Russel et al. (2010) spatially isolated its X-ray signal from the surrounding cluster in Chandra X-ray observatory observations and computed L_\odot = 10^{47} erg/s from the observed X-ray luminosity.
Excerpted from Wikipedia’s “H1821+643” article, available under the CC BY-SA 4.0 licence.