NGC 777

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NGC 777
NGC777 - SDSS DR14.jpg
NGC 777
Observation data (J2000 epoch)
Constellation Triangulum
Right ascension 2h 00m 14.907s [1]
Declination 31° 25′ 46″ [1]
Redshift 0.016708 [1]
Heliocentric radial velocity 5,015 km/s [2]
Distance 189 million ly (58.075 mpc) [2]
Apparent magnitude  (V)12 [3]
Characteristics
Type E1 [3]
Apparent size  (V)2.5' x 2.0' [3]
Other designations
CGCG 503-67, MCG 5-5-38, PGC 7584, UGC 1476

NGC 777 is an elliptical galaxy in the constellation of Triangulum. It was discovered by William Herschel on September 12, 1784. It has a weak active nucleus of type Seyfert 2 or LINER 2, [4] implying that the central region is obscured. When observed in radio waves the galaxy has a bright nucleus from which emerge small two radio jets about 18 kpc across. The jets are of Fanaroff–Riley class I. [5] It may be an outlying member of galaxy cluster Abell 262. [6]

References

  1. 1 2 3 "NGC 777". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2016-11-26.
  2. 1 2 "Results for Object NGC 0777". NASA/IPAC Extragalactic Database. Archived from the original on 2016-11-27. Retrieved 2016-11-26.
  3. 1 2 3 "New General Catalog Objects: NGC 750 - 799". Cseligman. Retrieved 2016-11-26.
  4. ↑ Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (1997). "A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". The Astrophysical Journal Supplement Series. 112 (2): 315–390. arXiv: astro-ph/9704107 . Bibcode:1997ApJS..112..315H. doi:10.1086/313041. S2CID   17086638.
  5. ↑ Capetti, A.; Brienza, M.; Balmaverde, B.; Best, P. N.; Baldi, R. D.; Drabent, A.; Gürkan, G.; Rottgering, H. J. A.; Tasse, C.; Webster, B. (April 2022). "The LOFAR view of giant, early-type galaxies: Radio emission from active nuclei and star formation". Astronomy & Astrophysics. 660: A93. doi:10.1051/0004-6361/202142911.
  6. ↑ Faber, S. M.; et al. (Seven Samurai) (1989). "Spectroscopy and Photometry of Elliptical Galaxies. VI. Sample Selection and Data Summary". The Astrophysical Journal Supplement Series. 69: 763–808. Bibcode:1989ApJS...69..763F. doi:10.1086/191327.


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