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The Circinus Galaxy, a Type II Seyfert galaxy. Seyfert galaxies are one of the two largest groups of active galaxies, along with quasar host galaxies. They have quasar-like nuclei (very luminous sources of electromagnetic radiation that are outside of our own galaxy) with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, [1] but unlike quasars, their ...
1ES 1927+654 was first cataloged during the Einstein Slew Survey, which aimed to identify X-ray sources in the sky. It was classified as a Seyfert galaxy due to its emission-line features. [15] A dramatic increase in brightness was detected in 2017, with the galaxy brightening by a factor of about 40 in the ultraviolet spectrum.
Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars. They have quasar-like nuclei (very luminous, distant and bright sources of electromagnetic radiation) with very high surface brightnesses; but unlike quasars, their host galaxies are clearly detectable. [ 126 ]
The Circinus Galaxy (ESO 97-G13) is a Seyfert galaxy [2] in the constellation of Circinus. It is located 4 degrees below the Galactic plane, and, at a distance of 4.0 Mpc (13 Mly), is one of the closest major galaxies to the Milky Way. [3] The galaxy is undergoing tumultuous changes, as rings of gas are likely being ejected from the galaxy. [4]
IRAS 13349+2438 is a Seyfert galaxy located in the constellation of Boötes.It is located 1.45 billion light-years from Earth [1] and a prototype infrared-luminous low-redshift quasar with a projected luminosity of 2 x10 46 erg s-1 according to Beichman who discovered it in 1986.
The luminosity class of NGC 1320 is I and it is an active Seyfert 2 galaxy. [1] NGC 1320 is a galaxy whose core shines in the ultraviolet region. It is listed in the Markarian catalog under the symbol Mrk 607 (MK 607). [3] To date, a non-redshift-based measurement gives a distance of approximately 37,700 Mpc (∼123 million ly). [4]
Pages in category "Seyfert galaxies" The following 185 pages are in this category, out of 185 total. ... Whirlpool Galaxy; Z. Z 229-15 This page was ...
NGC 3147 has been characterised as a Seyfert II galaxy. It is considered the best candidate to be a true type II Seyfert galaxy, [4] galaxies which feature optical/UV spectrum lacking broad emission lines due to the lack of the broad line region rather than its obscuration, since the nucleus is simultaneously seen unobscured in the X-rays.