Akn 564 is a Seyfert galaxy located around 113 megaparsecs from Earth, notable for being a nitrogen-loud galaxy and the closest of its type located in the local universe. Due to its proximity, it is able to be well-studied. Its proximity also allows it to serve as a close local analog for more distant nitrogen enriched galaxies.[1] It also has a rich Iron abundance and a hot intercloud medium.[2]
Spectra
This galaxy has a complex X-ray spectrum and X-ray light curves of this galaxy show rapid variability but there is no evidence for energy-dependence to these variations.[2]
Akn 564 also has a high metallicity with an extreme abundance of iron with a broad and asymmetric Fe Ka line.[2] It also has a high nickel abundance, meaning the galaxy has highly ionized gas.[3]
123Turner, T. J.; George, I. M.; Netzer, Hagai (1999-06-17), "Arakelian 564: An Unusual Component in the X-Ray Spectra of Narrow-Line Seyfert 1 Galaxies", The Astrophysical Journal, 526 (1): 52–59, arXiv:astro-ph/9906294, Bibcode:1999ApJ...526...52T, doi:10.1086/307995
