{{Short description|Seyfert galaxy in the constellation Draco}} {{Infobox galaxy|name=[[IRAS]] 18580+6527|epoch=[[J2000.0]]|constellation name=[[Draco (constellation)|Draco]]|ra={{RA|18|58|13.90}}<ref name="ned" />|dec={{DEC|+65|31|24.00}}<ref name="ned" />|z=0.176400<ref name="ned" />|dist_ly={{convert|783.13 ± 54.82|Mpc|Mly|abbr=on|lk=on|order=flip}}<ref name="ned" />|h_radial_v=52,883 [[kilometer per second|km/s]]<ref name="ned" />|mag_j=14.75 (VII Zw 852 NOTES02)|type=E;Sbrst+Sy2<ref name="ned" />|size=~{{convert|92.8|kpc|ly|abbr=on|lk=on|order=flip}} (estimated) (VII Zw 852 NOTES02)|names=VII Zw 852, WN B1858+6527, [[IRAS]] F18580+6527, CGPG 1858.0+6527, [[Principal Galaxies Catalogue|PGC]] 62625 & PGC 62626|image=File:Image of IRAS 18580+6527.png|caption=[[Pan-STARRS]] image of IRAS 18580+6527}}
'''IRAS 18580+6527''' is a [[Seyfert galaxy]] located in the constellation of [[Draco (constellation)|Draco]]. The [[redshift]] of the galaxy is (z) 0.176<ref name="ned">{{Cite web |title=NED Search results for IRAS 18580+6527 |url=https://ned.ipac.caltech.edu/byname?objname=IRAS+18580+6527&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1 |access-date=2026-04-12 |website=NASA/IPAC Extragalactic Database}}</ref> and it was first discovered by a Swiss [[astronomer]] named [[Fritz Zwicky]] in 1971, whom he described them as a pair of compact galaxies that are separated by 7 [[Minute and second of arc|arcseconds]] from each other. This pair has also been referred in Zwicky's catalogue as '''VII Zw 852'''<ref>{{Cite journal |last1=Zwicky |first1=Fritz |last2=Zwicky |first2=Margrit A. |date=1971 |title=Catalogue of selected compact galaxies and of post-eruptive galaxies |url=https://ui.adsabs.harvard.edu/abs/1971cscg.book.....Z/abstract |journal=Guemligen: Zwicky |bibcode=1971cscg.book.....Z |language=en}}</ref> with the first galaxy named '''VII Zw 852 NOTES01'''<ref>{{Cite web |title=NED Search results for VII Zw 852 NOTES01 |url=https://ned.ipac.caltech.edu/byname?objname=LEDA+62625&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1 |access-date=2026-04-12 |website=NASA/IPAC Extragalactic Database}}</ref> and the other named '''VII Zw NOTES02'''.<ref>{{Cite web |title=NED Search results for VII Zw 852 NOTES02 |url=https://ned.ipac.caltech.edu/byname?objname=LEDA+62626&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1 |access-date=2026-04-12 |website=NASA/IPAC Extragalactic Database}}</ref>
== Description == IRAS 18580+6527 is categorized as an [[Luminous infrared galaxy|ultraluminous infrared galaxy]] with an [[infrared]] luminosity rate of 12.26 L<sub>ʘ</sub>.<ref>{{Citation |last1=Garcia-Marin |first1=M. |title=Integral field optical spectroscopy of a representative sample of ULIRGs: I. The Data |date=2009-07-14 |last2=Colina |first2=L. |last3=Arribas |first3=S. |last4=Monreal-Ibero |first4=A. |journal=Astronomy and Astrophysics |volume=505 |issue=3 |page=1319 |doi=10.1051/0004-6361/200811324 |arxiv=0907.2408 |bibcode=2009A&A...505.1319G }}</ref> It is also classified as an [[Interacting galaxy|interacting]] pair of galaxies, with strong evidence that they will eventually [[Galaxy merger|merge]] with each other based on deep imaging observations.<ref name=":0">{{Cite journal |last1=Leech |first1=K. J. |last2=Rowan-Robinson |first2=M. |last3=Lawrence |first3=A. |last4=Hughes |first4=J. D. |date=March 1994 |title=Optical structure of a large sample of ultraluminous IRAS galaxies. |url=https://articles.adsabs.harvard.edu/pdf/1994MNRAS.267..253L |journal=Monthly Notices of the Royal Astronomical Society |language=en |volume=267 |issue=2 |pages=253–269 |doi=10.1093/mnras/267.2.253 |doi-access=free |issn=0035-8711}}</ref><ref name=":1">{{Cite journal |last1=Farrah |first1=D. |last2=Rowan-Robinson |first2=M. |last3=Oliver |first3=S. |last4=Serjeant |first4=S. |last5=Borne |first5=K. |last6=Lawrence |first6=A. |last7=Lucas |first7=R.A. |last8=Bushouse |first8=H. |last9=Colina |first9=L. |date=October 2001 |title=''HST''/WFPC2 imaging of the QDOT ultraluminous infrared galaxy sample |journal=Monthly Notices of the Royal Astronomical Society |volume=326 |issue=4 |pages=1333–1352 |doi=10.1111/j.1365-2966.2001.04721.x |doi-access=free |arxiv=astro-ph/0106275 |bibcode=2001MNRAS.326.1333F |issn=0035-8711}}</ref> The nucleus on the western component of the galaxy is found to be [[Active galactic nucleus|active]] and has been categorized as a Seyfert galaxy of type 2. Meanwhile, the nucleus on the eastern component has been described as a [[HII galaxy|H II galaxy]].<ref name=":0" /> The [[star formation]] rate has been estimated as 35.9 ± 17.6 [[Solar mass|M<sub>ʘ</sub>]] per year.<ref>{{Citation |last1=Arribas |first1=Santiago |title=Ionized gas outflows and global kinematics of low-z luminous star forming galaxies |date=2014-07-01 |last2=Colina |first2=Luis |last3=Bellocchi |first3=Enrica |last4=Maiolino |first4=Roberto |last5=Villar-Martin |first5=Montserrat |journal=Astronomy and Astrophysics |volume=568 |pages=A14 |doi=10.1051/0004-6361/201323324 |arxiv=1404.1082 |bibcode=2014A&A...568A..14A }}</ref>
It has been theorized that IRAS 18580+6527 is a product of several [[galaxy merger]]s.<ref>{{Cite journal |last1=Borne |first1=Kirk D. |last2=Bushouse |first2=Howard |last3=Lucas |first3=Ray A. |last4=Colina |first4=Luis |date=February 2000 |title=Evidence for Multiple Mergers among Ultraluminous Infrared Galaxies: Remnants of Compact Groups? |journal=The Astrophysical Journal |language=en |volume=529 |issue=2 |pages=L77–L80 |doi=10.1086/312461 |pmid=10622759 |arxiv=astro-ph/9912151 |bibcode=2000ApJ...529L..77B |issn=0004-637X}}</ref><ref name=":2">{{Cite journal |last1=Bushouse |first1=H. A. |last2=Borne |first2=K. D. |last3=Colina |first3=L. |last4=Lucas |first4=R. A. |last5=Rowan-Robinson |first5=M. |last6=Baker |first6=A. C. |last7=Clements |first7=D. L. |last8=Lawrence |first8=A. |last9=Oliver |first9=S. |date=January 2002 |title=Ultraluminous Infrared Galaxies: Atlas of Near-Infrared Images |journal=The Astrophysical Journal Supplement Series |language=en |volume=138 |issue=1 |pages=1–18 |doi=10.1086/324019 |arxiv=astro-ph/0108261 |bibcode=2002ApJS..138....1B |issn=0067-0049}}</ref> Imaging made by [[Hubble Space Telescope]] (HST) has found the western component contains four compact cores located in its central regions, suggesting the cores are remnants of four galaxies that have been coalescence into the former through [[tidal force]]s. The cores are also found to contain traces of faint hotspot features. [[H band (infrared)|H-band]] imaging showed at least one of the cores is shown as dust obscured based on its blotchy appearance.<ref name=":2" /> A fifth core is suggested to lie six kiloparsecs away from the four cores in the north direction.<ref name=":3">{{Cite journal |last1=Cui |first1=J. |last2=Xia |first2=X.-Y. |last3=Deng |first3=Z.-G. |last4=Mao |first4=S. |last5=Zou |first5=Z.-L. |date=July 2001 |title=Statistical Properties of Ultraluminous IRAS Galaxies from an HST Imaging Survey |journal=The Astronomical Journal |language=en |volume=122 |issue=1 |pages=63–82 |doi=10.1086/321127 |arxiv=astro-ph/0104296 |bibcode=2001AJ....122...63C |issn=0004-6256}}</ref> HST also detected several bright regions surrounding a much larger bright region, with detections of two more of these same regions located east. There is also a single [[tidal tail]] extending at 10 arcseconds towards northwest direction.<ref name=":1" /> A tidal ring feature is present and has a diameter of 20 kiloparsecs in length.<ref name=":3" />
== References == <references />
== External links == {{WikiSky}}
{{Draco (constellation)}}
[[Category:IRAS catalogue objects|18580+6527]] [[Category:Seyfert galaxies]] [[Category:Active galaxies]] [[Category:Interacting galaxies]] [[Category:Galaxy mergers]] [[Category:Zwicky objects]] [[Category:Principal Galaxies Catalogue objects|062626]] [[Category:Astronomical objects discovered in 1971]]