Circinus Galaxy

Circinus Galaxy
A Hubble Space Telescope (HST) image of the Circinus Galaxy. Credit: HST/NASA/ESA.
Observation data (J2000 epoch)
Constellation	Circinus
Right ascension	14^h 13^m 9.9^s^[1]
Declination	−65° 20′ 21″^[1]
Redshift	426 ± 25 km/s
Distance	13 Mly
Apparent magnitude (V)	12.1^[1]
Characteristics
Type	SA(s)b^[1]
Apparent size (V)	6′.9 × 3′.0^[1]
Other designations
ESO 97-G13,^[1] LEDA 50779

The Circinus Galaxy (ESO 97-G13) is a Seyfert galaxy^[2] in the Circinus constellation. It is located 4 degrees below the Galactic plane, and, at a distance of 13 million light-years, it is one of the closest to the Milky Way.^[3] The galaxy is undergoing tumultuous changes, as rings of gas are being ejected from the galaxy. The outermost ring is 700 light-years from the center of the galaxy and the inner ring is 130 light-years out. Although the Circinus galaxy can be seen using a small telescope, it was not noticed until 1977^[4] 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 further away than Centaurus A.

Circinus Galaxy was a home for SN 1996cr, that has been identified over a decade after it exploded. The supernova was first singled out in 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 (the "Council of Giants") surrounding the Local Group in the Local Sheet.

References

1 2 3 4 5 6 "NASA/IPAC Extragalactic Database". Results for ESO 97-13. Retrieved 2007-04-20.
↑ "SIMBAD Astronomical Database". Results for ESO 97-13. Retrieved 2007-04-20.
↑ Maiolino, R.; Krabbe, A.; Thatte, N.; Genzel, R. (1998). "Seyfert Activity and Nuclear Star Formation in the Circinus Galaxy". The Astrophysical Journal. 493 (2): 650–65. arXiv:astro-ph/9709091. Bibcode:1998ApJ...493..650M. doi:10.1086/305150.
↑ Inglis, Mike (2004). Astronomy of the Milky Way: Observer's Guide to the Southern Sky. New York, New York: Springer. p. 31. ISBN 1-85233-742-7.

External links

Coordinates: 14^h 13^m 9.9^s, −65° 20′ 21″

List of notable Seyfert galaxies

Seyfert 1	Arakelian 120 Arakelian 564 Arp 102B 3C 59 ESO 141-055 ESO 198-G24 ESO 323-G077 ESO 362-18 Fairall 9 Fairall 51 H0557-385 1H 0419-577 1H 1707-495 IC 3599 IC 4329A IRAS 07598+6508 IRAS 13224-3809 IRAS 13349+1428 Markarian 6 Markarian 50 Markarian 79 Markarian 110 Markarian 279 Markarian 315 Markarian 334 Markarian 335 Markarian 359 Markarian 376 Markarian 423 Markarian 478 Markarian 507 Markarian 509 Markarian 609 Markarian 618 Markarian 704 Markarian 705 Markarian 817 Markarian 841 Markarian 896 Markarian 993 Markarian 1018 Markarian 1044 Markarian 1239 MCG -2-58-22 MCG-6-30-15 MGC +8-11-11 Messier 81 PG 1211+143 PG 1244+026 PG 1402+261 PG 1404+226 PKS 0558-504 PMN J0948+0022 RE J0134+396 SBS 0846+513 Ton S180 I Zw 1 III Zw 2 III Zw 77

Seyfert 2	Circinus Galaxy ESO 103-G35 ESO 428-G14 IC 2560 IC 3639 IRAS 05189-2524 IRAS 13197-1627 IRAS 18325-5926 IRAS 19014+4109 IRAS F01475-0740 Markarian 3 Markarian 34 Markarian 78 Markarian 176 Markarian 266 SW Markarian 273 Markarian 463 Markarian 477 Markarian 573 Markarian 1066 Markarian 1210 MCG-5-23-16 Messier 77 Messier 88 Messier 106 NGC 454E NGC 2788A NGC 4676B NGC 4922N Whirlpool Galaxy

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