Circinusgalaxie

Galaxie
PGC 50779
{{{Kartentext}}}
Aufnahme des Hubble-Weltraumteleskops
AladinLite
Sternbild Zirkel
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension 14h 13m 10s [1]
Deklination −65° 20′ 21″ [1]
Erscheinungsbild
Morphologischer Typ SA(s)b: / Sy2[1]
Helligkeit (visuell) 12,1 mag
Helligkeit (B-Band)  mag
Winkel­ausdehnung 6,9′ × 3′[1]
Positionswinkel
Inklination °
Flächen­helligkeit  mag/arcmin²
Physikalische Daten
Zugehörigkeit
Rotverschiebung 0.001448 ± 0.000010[1]
Radial­geschwin­digkeit 426 ± 25 km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc) 		(12 ± 1) · 106 Lj
(3,64 ± 0,27) Mpc [1]
Absolute Helligkeit mag
Masse M☉
Durchmesser 40000 Lichtjahre Lj
Metallizität [Fe/H] {{{Metallizität}}}
Geschichte
Entdeckung
Entdeckungsdatum 1977
Katalogbezeichnungen
PGC 50779 • ESO 097-013 • IRAS 14092-6506 • 2MASX J14130990-6520204 • SGC 140918-6506.3 • HIPASS J1413-65 • LDCE 993 NED010

Die Circinusgalaxie (PGC 50779) ist eine spiralförmige Typ-2-Seyfertgalaxie vom Hubble-Typ Sb im Sternbild Zirkel am Südsternhimmel. Sie ist die uns am nächsten stehende bekannte Aktive Galaxie und befindet sich gerade einmal 4 Grad unterhalb der Galaktischen Ebene und ist etwa 13 Millionen Lichtjahre von der Milchstraße entfernt.

Die Galaxie enthält große Mengen an turbulentem Gas, das in zwei Ringen um das Zentrum konzentriert ist. Der äußere Ring ist etwa 700 Lichtjahre vom Zentrum der Galaxie entfernt und zeigt starke Sternentstehung. Der innere Ring weist einen Radius von etwa 130 Lichtjahren auf.

Obwohl es sich um eine relativ nahe gelegene Galaxie handelt, wurde sie erst in den 1970er-Jahren entdeckt, da sie von Materie unserer eigenen Galaxie verdunkelt wird.

Die Typ-IIn-Supernova SN 1996cr wurde hier beobachtet.[2]

Commons: Circinus Galaxy – Sammlung von Bildern, Videos und Audiodateien

Einzelnachweise

  1. ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. ↑ Simbad

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