Circinus Galaxy

The Circinus Galaxy (ESO 97-G13) is a Seyfert galaxy<ref name="simbad">Template:Cite simbad</ref> in the constellation of Circinus. It is located 4 degrees below the Galactic plane, and, at a distance of Template:Convert, is one of the closest major galaxies to the Milky Way.<ref>Template:Cite journal</ref> The galaxy is undergoing tumultuous changes, as rings of gas are likely being ejected from the galaxy.<ref>Template:Cite journal</ref> Its outermost ring is 1400 light-years across while the inner ring is 260 light-years across.Template:Citation needed Although the Circinus galaxy can be seen using a small telescope, it was not noticed until 1977<ref>Template:Cite book</ref> because it lies close to the plane of the Milky Way and is obscured by galactic dust. The Circinus Galaxy is a Type II Seyfert galaxy and is one of the closest known active galaxies to the Milky Way, though it is probably slightly farther away than Centaurus A.

Circinus Galaxy produced supernova SN 1996cr, which was identified over a decade after it exploded. This supernova event was first observed during 2001 as a bright, variable object in a Chandra X-ray Observatory image, but it was not confirmed as a supernova until years later.

The Circinus Galaxy is one of twelve large galaxies in the "Council of Giants" surrounding the Local Group in the Local Sheet.<ref name="10.1093/mnras/stu199"> Template:Cite journal</ref> One object is possibly a satellite of the Circinus Galaxy, known as HIZOA J1353-58. HIZOA J1353-58 was discovered in a survey of neutral hydrogen (H I) and is located within the Zone of Avoidance.<ref>Template:Cite journal</ref>

NuSTAR detected a ULX at the edge of this galaxy, a black hole about 100 times the mass of the Sun. <ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

External links

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• Chandra X observatory Examines Black Holes Large and Small in Nearby Galaxy
• The Hubble European Space Agency picture and information
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