IRAS 13224-3809

{{Short description|Galaxy containing well-studied supermassive black hole}}

{{use dmy dates|date=January 2020}}

{{Infobox Galaxy

| name = IRAS 13224-3809

| image =File:DESI Legacy Survey image of IRAS 13224-3809.jpg

| image_size =

| caption =DESI Legacy Surveys image of IRAS 13224-3809

| credit =

| epoch = J2000{{cite web |author=Staff |title=2MASX J13251937-3824524 - Seyfert 1 Galaxy |url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=IRAS%2013224-3809 |date=20 January 2020 |work=SIMBAD |access-date=20 January 2020 }}

| type =

| ra = {{RA|13|25|19.38}}

| dec = {{DEC|-38|24|52.61}}

| dist_ly = 1 billion light-years

| z = 0.06580 ± 0.00018

| appmag_v = 13.80{{cite web|url=http://leda.univ-lyon1.fr/ledacat.cgi?o=IRAS%2013224-3809|title=Search specification: IRAS 13224-3809|work=HyperLeda|publisher=Université Claude Bernard Lyon 1|accessdate=2021-02-23}}

| size_v =

| constellation name = Centaurus

| notes =

| names = 2MASX J13251937-3824524; 2MASS J13251937-3824526; GSC 07787-00931; IRAS F13224-3809; PGC 88835; 1RXS J132519.4-382445; WISE J132519.39-382452.5; Gaia DR2 6162481890199388928

}}

IRAS 13224-3809 is a highly active and fluctuating Seyfert 1 galaxy in the constellation Centaurus{{cite web |author=Staff |title=Finding the constellation which contains given sky coordinates |url=http://djm.cc/constellation.html |date=2 August 2008 |work=DJM.cc |access-date=20 January 2020 }} about 1 billion light-years from Earth.{{cite news |last=Drake |first=Nadia |author-link=Nadia Drake |title=Astronomers just got a deep peek at a black hole - Using a technique akin to echolocation, scientists were able to map the region around a distant black hole's event horizon in unprecedented detail. |url=https://www.nationalgeographic.com/science/2020/01/astronomers-just-got-deep-peek-at-black-hole-xray-newton/ |archive-url=https://web.archive.org/web/20200120213025/https://www.nationalgeographic.com/science/2020/01/astronomers-just-got-deep-peek-at-black-hole-xray-newton/ |url-status=dead |archive-date=20 January 2020 |date=20 January 2020 |work=National Geographic Society |access-date=20 January 2020 }}{{cite journal |author=Alston, William N. |display-authors=et al. |title=A dynamic black hole corona in an active galaxy through X-ray reverberation mapping |url=https://www.nature.com/articles/s41550-019-1002-x |date=20 January 2020 |journal=Nature Astronomy |volume=4 |issue=6 |pages=597–602 |doi=10.1038/s41550-019-1002-x |access-date=20 January 2020 |arxiv=2001.06454 |bibcode=2020NatAs...4..597A |hdl=1721.1/129519 |s2cid=210713866 }}{{cite news |author=University of Southampton |title=Echoes of light help scientists map the behaviour of a black hole |url=https://www.technology.org/2020/01/20/echoes-of-light-help-scientists-map-the-behaviour-of-a-black-hole/ |date=20 January 2020 |work=Technology.org |access-date=20 January 2020 }} The galaxy is notable due to its centrally-located supermassive black hole that is closely studied by astronomers using x-ray astronomy, particularly X-ray reverberation echo mapping techniques, in an effort to better understand the inner workings, including mass and spin, of black holes.

File:NICER Charts the Area Around a New Black Hole.webm (video; 3:33)