Z 229-15 Explained

Z 229-15
Epoch:J2000
Dist Ly:390 million
Ra:19 5 25.87
Dec:42° 27' 41.22"
Constellation Name:Lyra
Z:0.027879
Type:Sy1
Notes:Seyfert galaxy containing a quasar
Names:PGC 62756, CGCG 229-015, KIC 006932990, 2PBC J1905.3+4232

Z 229-15 is a ring galaxy in the constellation Lyra.[1] It is around 390 million light-years from Earth. It has been referred to by NASA and other space agencies as hosting an active galactic nucleus, a quasar, and a Seyfert galaxy, each of which overlap in some way.

Discovery

Z 229-15 was first discovered by astronomer, D. Proust from the Meudon Observatory in 1990. According to Proust, he described the object as a possible obscured spiral galaxy featuring strong signs of absorption. Additionally, Z 229-15 was also observed through the 1.93-m telescope taken at Observatorie de Haute-Provence.[2]

Classification

Z 229-15's classification has been up for speculation for many years. Z 229-15 has been widely called a quasar, and if this is true would make Z 229-15 positively local. Many space agencies, notably NASA, have called it a Seyfert galaxy that contains a quasar, and that, by definition, hosts an active galactic nuclei. This would make Z 229-15 a very uncommon galaxy in scientific terms.[3]

Supermassive black hole

Z 229-15 has a supermassive black hole at its core.[4] [5] The mass of the black hole is

log10MBH=6.94\pm0.14

solar masses.[6] The interstellar matter in Z 229-15 gets so hot that it releases a large amount of energy across the electromagnetic spectrum on a regular basis.[7]

Notes and References

  1. Web site: Stefanie Waldek . 2023-03-29 . Hubble telescope spies mysterious celestial object that defies classification . 2024-03-21 . Space.com . en.
  2. Proust . D. . 1990-11-01 . Zwicky 229-15 . International Astronomical Union Circular . 5134 . 2 . 1990IAUC.5134....2P . 0081-0304.
  3. Web site: information@eso.org . Everything, in one place, all at once . 2024-07-26 . www.esahubble.org . en.
  4. Web site: Lazaro . Enrico de . 2023-03-27 . Hubble Space Telescope Spots Very Luminous Seyfert Galaxy Sci.News . 2024-03-21 . Sci.News: Breaking Science News . en-US.
  5. Barth . Aaron J. . Nguyen . My L. . Malkan . Matthew A. . Filippenko . Alexei V. . Li . Weidong . Gorjian . Varoujan . Joner . Michael D. . Bennert . Vardha Nicola . Botyanszki . Janos . Cenko . S. Bradley . Childress . Michael . Choi . Jieun . Comerford . Julia M. . Cucciara . Antonino . da Silva . Robert . 2011-05-01 . Broad-line Reverberation in the Kepler-field Seyfert Galaxy Zw 229-015 . The Astrophysical Journal . 732 . 2 . 121 . 10.1088/0004-637X/732/2/121 . 1103.2153 . 2011ApJ...732..121B . 0004-637X.
  6. Williams . Peter R. . Pancoast . Anna . Treu . Tommaso . Brewer . Brendon J. . Barth . Aaron J. . Bennert . Vardha N. . Buehler . Tabitha . Canalizo . Gabriela . Cenko . S. Bradley . Clubb . Kelsey I. . Cooper . Michael C. . Filippenko . Alexei V. . Gates . Elinor . Hoenig . Sebastian F. . Joner . Michael D. . 2018-10-01 . The Lick AGN Monitoring Project 2011: Dynamical Modeling of the Broad-line Region . The Astrophysical Journal . 866 . 2 . 75 . 10.3847/1538-4357/aae086 . free . 1809.05113 . 2018ApJ...866...75W . 0004-637X.
  7. Web site: Hubble Views an Intriguing Active Galaxy . 2024-03-21 . science.nasa.gov . en.

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