NGC 4261

Galaxie
NGC 4261
{{{Kartentext}}}
NGC 4261 mit LEDA 39660 (u)[1] (SDSS-Aufnahme)
AladinLite
Sternbild Jungfrau
Position
ÄquinoktiumJ2000.0, Epoche: J2000.0
Rektaszension 12h 19m 23,2s [2]
Deklination +05° 49′ 31″ [2]
Erscheinungsbild
Morphologischer Typ E2-3 / LINER / Sy3[2]
Helligkeit (visuell) 10,4 mag[3]
Helligkeit (B-Band) 11,4 mag[3]
Winkel­ausdehnung 4,1′ × 3,6′[3]
Positionswinkel 160°[3]
Inklination °
Flächen­helligkeit 13,4 mag/arcmin²[3]
Physikalische Daten
Zugehörigkeit Virgo-Cluster
NGC 4261-Gruppe
WBL 392
LGG 278[2][4]
Rotverschiebung 0.007378 ± 0.000017[2]
Radial­geschwin­digkeit (2212 ± 5) km/s[2]
Hubbledistanz
H0 = 73 km/(s • Mpc)
(95 ± 7) · 106 Lj
(29,2 ± 2,0) Mpc [2][5]
Absolute Helligkeit mag
Masse M
Durchmesser Lj
Metallizität [Fe/H] {{{Metallizität}}}
Geschichte
Entdeckung William Herschel
Entdeckungsdatum 13. April 1784
Katalogbezeichnungen
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 • GALEXASC J121923.25+054929.9 • LDCE 904 NED041 • EVCC 342

NGC 4261 ist eine elliptische Galaxie mit aktivem Galaxienkern vom Hubble-Typ E2 im Sternbild Jungfrau auf der Ekliptik. Sie ist schätzungsweise 95 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 120.000 Lichtjahren. Die Galaxie ist unter der Katalognummer VCC 345 als Mitglied des Virgo-Galaxienhaufens gelistet.

NGC 4261: links Radiofrequenzbereich (farbig), optisch (grau) – rechts optisch, 100-fach vergrößert

NGC 4261 besitzt bipolare Jets, die radioastronomisch beobachtet werden, und die weit über die im optischen Spektralbereich erkennbare elliptische Struktur hinausgehen. Im Zentrum der Galaxie befindet sich eine Akkretionsscheibe, die mithilfe des Hubble-Weltraumteleskops entdeckt wurde, und die auf ein zentrales Schwarzes Loch mit 5·108 Sonnenmassen hindeutet – die hundertfache Masse des Schwarzen Lochs im Zentrum der Milchstraße.[6]

Im selben Himmelsareal befinden sich u. a. die Galaxien NGC 4257, NGC 4264, NGC 4269, IC 3155.

Die Typ-Ia-Supernova SN 2001A wurde hier beobachtet.[7]

Das Objekt wurde am 13. April 1784 von William Herschel entdeckt.[8]

NGC 4261-Gruppe (LGG 278)

Galaxie Alternativname Entfernung/Mio. Lj
NGC 4180 PGC 38964 90
NGC 4197 PGC 39114 88
NGC 4215 PGC 39251 86
NGC 4261 PGC 39659 95
NGC 4233 PGC 39384 100
NGC 4234 PGC 39388 87
NGC 4223 PGC 39412 96
NGC 4260 PGC 39656 84
PGC 39107 VCC 114 89
PGC 39392 VCC 223 90
PGC 39929 VCC 468 84
PGC 39188 MCG +1-31-30 86
PGC 39265 MCG +1-31-33 94
Commons: NGC 4261 – Sammlung von Bildern, Videos und Audiodateien

Einzelnachweise

  1. Aladin Lite
  2. a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  3. a b c d e 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. Jahrgang, 1993, S. 1–25, doi:10.1086/191753, bibcode:1993ApJS...85....1N. 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. Jahrgang, Nr. 2, Februar 2003, S. 712–726, doi:10.1086/345430, arxiv:astro-ph/0210129, bibcode:2003ApJ...583..712J.
  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. Jahrgang, 1996, S. 444, doi:10.1086/177876, bibcode:1996ApJ...470..444F.
  7. Simbad
  8. Seligman

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