NGC 4261

from Wikipedia, the free encyclopedia
Galaxy
data from NGC 4261
{{{Card text}}}
NGC 4261 with LEDA 39660 (u) [1] (SDSS)
NGC 4261 with LEDA 39660 (u) ( SDSS )
AladinLite
Constellation Virgin
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 12 h 19 m 23.2 s
declination + 05 ° 49 ′ 31 ″
Appearance
Morphological type E2-3 / LINER / Sy3  
Brightness  (visual) 10.4 mag
Brightness  (B-band) 11.4 mag
Angular expansion 4.1 ′ × 3.6 ′
Position angle 160 °
Surface brightness 13.4 mag / arcmin²
Physical data
Affiliation Virgo cluster
NGC 4261 group
WBL 392
LGG 278  
Redshift 0.007378 ± 0.000017  
Radial velocity 2212 ± 5 km / s  
Stroke distance
v rad  / H 0 		(95 ± 7)  x  10 6  ly
(29.2 ± 2.0)  Mpc 
history
discovery William Herschel
Discovery date April 13, 1784
Catalog names
NGC  4261 • UGC  7360 • PGC  39659 • CGCG  042-013 • MCG  + 01-31-052 • 2MASX  J12192326 + 0549289 • VCC  345 • GC  2842 • H  II 139 • h  1176 • GALEX ASC J121923.25 + 054929.9 • LDCE 904 NED041 • EVCC 342

NGC 4261 is an elliptical galaxy with an active nucleus of the Hubble type E2 in the constellation Virgo on the ecliptic . It is an estimated 95 million light years from the Milky Way and about 120,000 light years in diameter. The galaxy is listed under catalog number VCC 345 as a member of the Virgo galaxy cluster .

NGC 4261: left radio frequency range (colored), optical (gray) - right optical, magnified 100 times

NGC 4261 has bipolar jets , which are observed radio-astronomically , and which go far beyond the elliptical structure recognizable in the optical spectral range. In the center of the galaxy is an accretion disk , which was discovered with the help of the Hubble Space Telescope and which points to a central black hole with 5 · 10 8 solar masses - 100 times the mass of the black hole in the center of the Milky Way .

The galaxies NGC 4257 , NGC 4264 , NGC 4269 , IC 3155 are located in the same area of ​​the sky .

The Type Ia supernova SN 2001A was observed here.

The object was discovered by William Herschel on April 13, 1784 .

Web links

Commons : NGC 4261  - collection of images, videos, and audio files

Individual evidence

  1. ^ Aladin Lite
  2. ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  3. ↑ a b c d e f SEDS : NGC 4261
  4. ^ VizieR
  5. ↑ Richard Nolthenius: A revised catalog of CFA1 galaxy groups in the Virgo / Great Attractor flow field . In: Astrophysical Journal Supplement Series . 85, no. 1, 1993, pp. 1-25. bibcode : 1993ApJS ... 85 .... 1N . doi : 10.1086 / 191753 . Joseph B. Jensen, John L. Tonry, Brian J. Barris, Rodger I. Thompson, Michael C. Liu, Marcia J. Rieke, Edward A. Ajhar, John P. Blakeslee: Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations . In: Astrophysical Journal . 583, No. 2, February 2003, pp. 712-726. arxiv : astro-ph / 0210129 . bibcode : 2003ApJ ... 583..712J . doi : 10.1086 / 345430 .
  6. ↑ Laura Ferrarese, Holland C. Ford, Walter Jaffe: Evidence for a Massive Black Hole in the Active Galaxy NGC 4261 from Hubble Space Telescope Images and Spectra . In: Astrophysical Journal . 470, 1996, p. 444. bibcode : 1996ApJ ... 470..444F . doi : 10.1086 / 177876 .
  7. ↑ Simbad
  8. ↑ Seligman