NGC 6814

This page was last edited on 16 July 2017, at 05:15.

NGC 6814 is an intermediate spiral galaxy in constellation Aquila. It is located at a distance of about 75 million light years from Earth, which, given its apparent dimensions, means that NGC 6814 is about 85,000 light years across. NGC 6814 has an extremely bright nucleus and is a type 1.5 Seyfert galaxy. The galaxy is also a highly variable source of X-ray radiation. The ultraviolet and optical emission also varies, although more smoothly, with time lag of two days. The cause of the lag and the smoothening of lightcurves is considered to be the reprossesing of the X-rays in the accretion disk.[2] The cause of the active galactic nucleus is suspected to be a supermassive black hole with a mass about 18 million times that of the Sun. Many regions of ionised gas are studded along the dusty spiral arms.[3]

NGC 6814
A spiral snowflake.jpg
Observation data (J2000 epoch)
Constellation Aquila
Right ascension 19h 42m 40.6s[1]
Declination −10° 19′ 25″[1]
Redshift 1563 ± 2 km/s[1]
Distance 74 Mly (22.8 Mpc)[1]
Apparent magnitude (V) 12.1
Characteristics
Type SAB(rs)bc [1]
Apparent size (V) 3′.0 × 2′.8[1]
Other designations
MCG -02-50-001, PGC 63545[1]

References

  1. ^ a b c d e f g "NASA/IPAC Extragalactic Database". Results for NGC 6814. Retrieved 2016-01-18.
  2. ^ Troyer, Jon; Starkey, David; Cackett, Edward M.; Bentz, Misty C.; Goad, Michael R.; Horne, Keith; Seals, James E. (14 January 2016). "Correlated X-ray/ultraviolet/optical variability in NGC 6814". Monthly Notices of the Royal Astronomical Society. 456 (4): 4040–4050. arXiv:1509.01124Freely accessible. doi:10.1093/mnras/stv2862.
  3. ^ "A spiral snowflake". www.spacetelescope.org. 9 May 2016. Retrieved 13 March 2017.

External links

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