View source for Z 229-15

{{Short description|Ring galaxy in Constellation Lyra}}
{{Infobox quasar
| name    = Z 229-15
| image   = Everything, in one place, all at once (potw2313a).tiff
| epoch   = J2000
| dist_ly = 390 million
| ra      = 19 5 25.87
| dec     = 42° 27' 41.22"
| caption = Z 229-15, as photographed by the [[Hubble Space Telescope]]
|constellation name=[[Lyra]]|z=0.027879|type=Sy1|notes=[[Seyfert galaxy]] containing a [[quasar]]|names=[[Principal Galaxies Catalogue|PGC]] 62756, [[Catalogue of Galaxies and of Clusters of Galaxies|CGCG]] 229-015, KIC 006932990, 2PBC J1905.3+4232}}

'''Z 229-15''' is a [[ring galaxy]] in the constellation [[Lyra]].<ref>{{Cite web |author1=Stefanie Waldek |date=2023-03-29 |title=Hubble telescope spies mysterious celestial object that defies classification |url=https://www.space.com/hubble-telescope-mystery-object-lyra-Z-229-15 |access-date=2024-03-21 |website=Space.com |language=en}}</ref> 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. 

Z 229-15 was first discovered by [[astronomer]], D. Proust from the [[Paris Observatory|Meudon Observatory]] in 1990. According to Proust, he described the object as a possible obscured [[spiral galaxy]] featuring strong signs of [[Absorption (electromagnetic radiation)|absorption]]. Additionally, Z 229-15 was also observed through the 1.93-m [[telescope]] taken at [[Haute-Provence Observatory|Observatorie de Haute-Provence]].<ref>{{Cite journal |last=Proust |first=D. |date=1990-11-01 |title=Zwicky 229-15 |url=https://ui.adsabs.harvard.edu/abs/1990IAUC.5134....2P |journal=International Astronomical Union Circular |issue=5134 |pages=2 |bibcode=1990IAUC.5134....2P |issn=0081-0304}}</ref> 

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.<ref>{{Cite web |last=information@eso.org |title=Everything, in one place, all at once |url=https://www.esahubble.org/images/potw2313a/ |access-date=2024-07-26 |website=www.esahubble.org |language=en}}</ref> 

Z 229-15 has a supermassive black hole at its core.<ref>{{Cite web |last=Lazaro |first=Enrico de |date=2023-03-27 |title=Hubble Space Telescope Spots Very Luminous Seyfert Galaxy {{!}} Sci.News |url=https://www.sci.news/astronomy/hubble-very-luminous-seyfert-galaxy-11776.html |access-date=2024-03-21 |website=Sci.News: Breaking Science News |language=en-US}}</ref><ref>{{Cite journal |last1=Barth |first1=Aaron J. |last2=Nguyen |first2=My L. |last3=Malkan |first3=Matthew A. |last4=Filippenko |first4=Alexei V. |last5=Li |first5=Weidong |last6=Gorjian |first6=Varoujan |last7=Joner |first7=Michael D. |last8=Bennert |first8=Vardha Nicola |last9=Botyanszki |first9=Janos |last10=Cenko |first10=S. Bradley |last11=Childress |first11=Michael |last12=Choi |first12=Jieun |last13=Comerford |first13=Julia M. |last14=Cucciara |first14=Antonino |last15=da Silva |first15=Robert |date=2011-05-01 |title=Broad-line Reverberation in the Kepler-field Seyfert Galaxy Zw 229-015 |url=https://ui.adsabs.harvard.edu/abs/2011ApJ...732..121B |journal=The Astrophysical Journal |volume=732 |issue=2 |pages=121 |doi=10.1088/0004-637X/732/2/121 |arxiv=1103.2153 |bibcode=2011ApJ...732..121B |issn=0004-637X}}</ref> The mass of the black hole is <math>\log_{10}M_{BH}=6.94\pm0.14</math> [[Solar mass|solar masses]].<ref>{{Cite journal |last1=Williams |first1=Peter R. |last2=Pancoast |first2=Anna |last3=Treu |first3=Tommaso |last4=Brewer |first4=Brendon J. |last5=Barth |first5=Aaron J. |last6=Bennert |first6=Vardha N. |last7=Buehler |first7=Tabitha |last8=Canalizo |first8=Gabriela |last9=Cenko |first9=S. Bradley |last10=Clubb |first10=Kelsey I. |last11=Cooper |first11=Michael C. |last12=Filippenko |first12=Alexei V. |last13=Gates |first13=Elinor |last14=Hoenig |first14=Sebastian F. |last15=Joner |first15=Michael D. |date=2018-10-01 |title=The Lick AGN Monitoring Project 2011: Dynamical Modeling of the Broad-line Region |journal=The Astrophysical Journal |volume=866 |issue=2 |pages=75 |doi=10.3847/1538-4357/aae086 |doi-access=free |arxiv=1809.05113 |bibcode=2018ApJ...866...75W |issn=0004-637X}}</ref> The [[Interstellar medium|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.<ref>{{Cite web |title=Hubble Views an Intriguing Active Galaxy |url=https://science.nasa.gov/missions/hubble/hubble-views-an-intriguing-active-galaxy/ |access-date=2024-03-21 |website=science.nasa.gov |language=en}}</ref>

== References ==
{{Reflist}}

[[Category:Lyra]]
[[Category:Ring galaxies]]
[[Category:Quasars]]
[[Category:Seyfert galaxies]]
[[Category:Principal Galaxies Catalogue objects|62756]]
[[Category:Astronomical objects discovered in 1990]]