Expansion og article to discuss discovery and structure
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| names = Pisces B,[ PSC B, GALFA-Dw2] |
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| names = Pisces B,[ PSC B, GALFA-Dw2] |
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}}'''Pisces B''' ('''Psc B''') is an [[Irregular galaxy|irregular]] [[Void galaxy|void]] [[Dwarf galaxy|dwarf]] [[galaxy]] within the [[Local Void]] in the [[constellation]] [[Pisces (constellation)|Pisces]], near [[Pisces A]], and lies 9.2 [[Megaparsec|megaparsecs]] (30 million [[Light-year|light-years]]) away from the [[Earth]].[{{Cite web |last=Staff |first=News |date=2016-08-15 |title=Hubble Sees Two Dwarf Galaxies in Pisces {{!}} Sci.News |url=https://www.sci.news/astronomy/hubble-dwarf-galaxies-pisces-04103.html |access-date=2026-04-22 |website=Sci.News: Breaking Science News |language=en-US}}] It was discovered by [[Yale University|Yale]], [[Columbia University|Columbia]], and [[California Institute of Technology|CalTech]] [[Astronomer|astronomers]] using the [[WIYN Observatory]] in November 2014, along with its neighbor Pisces A, as a result of a blind [[H I region|HI region]] [[Astronomical survey|survey]].[{{Cite journal |last=Tollerud |first=Erik J. |last2=Geha |first2=Marla C. |last3=Grcevich |first3=Jana |last4=Putman |first4=Mary E. |last5=Weisz |first5=Daniel R. |last6=Dolphin |first6=Andrew E. |date=2016-08-20 |title=HST IMAGING OF THE LOCAL VOLUME DWARF GALAXIES PISCES A AND B: PROTOTYPES FOR LOCAL GROUP DWARFS |url=https://iopscience.iop.org/article/10.3847/0004-637X/827/2/89 |journal=The Astrophysical Journal |volume=827 |issue=2 |pages=89 |doi=10.3847/0004-637X/827/2/89 |issn=0004-637X}}][{{Cite journal |last=Tollerud |first=Erik J. |last2=Geha |first2=Marla C. |last3=Grcevich |first3=Jana |last4=Putman |first4=Mary E. |last5=Weisz |first5=Daniel R. |last6=Dolphin |first6=Andrew E. |date=2016-08-20 |title=HST IMAGING OF THE LOCAL VOLUME DWARF GALAXIES PISCES A AND B: PROTOTYPES FOR LOCAL GROUP DWARFS |url=https://iopscience.iop.org/article/10.3847/0004-637X/827/2/89 |journal=The Astrophysical Journal |volume=827 |issue=2 |pages=89 |doi=10.3847/0004-637X/827/2/89 |issn=0004-637X}}][{{Cite journal |last=Tollerud |first=Erik J. |last2=Geha |first2=Marla C. |last3=Grcevich |first3=Jana |last4=Putman |first4=Mary E. |last5=Stern |first5=Daniel |date=2015-01 |title=Two Local Volume Dwarf Galaxies Discovered in 21 cm Emission: Pisces A and B |url=https://ui.adsabs.harvard.edu/abs/2015ApJ...798L..21T/abstract |journal=The Astrophysical Journal |language=en |volume=798 |issue=1 |pages=L21 |doi=10.1088/2041-8205/798/1/L21 |issn=0004-637X}}] About 100 million years ago, the galaxy started moving out of the [[Void (astronomy)|void]] and into the local [[Filament of galaxies|filament]] zone and denser gaseous environment. This sparked off a doubling of the rate of star formation.[{{Cite web |title=Hubble uncovers a galaxy pair coming in from the wilderness |url=https://www.sciencedaily.com/releases/2016/08/160811142637.htm |access-date=2026-04-22 |website=ScienceDaily |language=en}}] |
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'''Pisces B''' ('''Psc B''') is a [[void galaxy|void]] [[dwarf galaxy|dwarf]] [[galaxy]]. It is located in the [[Local Void]], near [[Pisces A]]; and is in the [[Pisces constellation]]. It is 30 million [[light-year]]s (9.2 [[megaparsec]]s) away from the Earth.[ {{cite news |url= http://www.sci-news.com/astronomy/hubble-dwarf-galaxies-pisces-04103.html |title= Hubble Sees Two Dwarf Galaxies in Pisces |publisher= Sci-News |date= 15 August 2016 }} ] The galaxy was discovered with the [[WIYN Observatory]]. About 100 million years ago, the galaxy started moving out of the [[Void (astronomy)|void]] and into the local [[filament of galaxies|filament]] zone and denser gaseous environment. This sparked off a doubling of the rate of star formation.[ {{cite news |url= https://www.sciencedaily.com/releases/2016/08/160811142637.htm |title= Hubble uncovers a galaxy pair coming in from the wilderness |date= 11 August 2016 |publisher= Science Daily }} ] |
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== Structure == |
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Pisces B consists of an irregular-galaxy structure, with a much less complex [[Galaxy#Modern research|composition]] consisting of cooler gas in comparison to other [[Galaxy|galaxies]];[{{Cite journal |last=Carignan |first=C. |last2=Libert |first2=Y. |last3=Lucero |first3=D. M. |last4=Randriamampandry |first4=T. H. |last5=Jarrett |first5=T. H. |last6=Oosterloo |first6=T. A. |last7=Tollerud |first7=E. J. |date=2016-03-01 |title=H I observations of two new dwarf galaxies: Pisces A and B with the SKA Pathfinder KAT-7 |url=https://www.aanda.org/articles/aa/abs/2016/03/aa27910-15/aa27910-15.html |journal=Astronomy & Astrophysics |language=en |volume=587 |pages=L3 |doi=10.1051/0004-6361/201527910 |issn=0004-6361}}] this is most likely a result of lower rates of star formation throughout the galaxy's past.[{{Cite journal |last=Merritt |first=Allison |last2=van Dokkum |first2=Pieter |last3=Abraham |first3=Roberto |date=2014-06 |title=The Discovery of Seven Extremely Low Surface Brightness Galaxies in the Field of the Nearby Spiral Galaxy M101 |url=https://ui.adsabs.harvard.edu/abs/2014ApJ...787L..37M/abstract |journal=The Astrophysical Journal |language=en |volume=787 |issue=2 |pages=L37 |doi=10.1088/2041-8205/787/2/L37 |issn=0004-637X}}] However, Pisces B is currently trafveling towards a larger region of gas and other [[Interstellar medium|interstellar mediums]]; |
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== Discovery == |
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Astronomers Erik Tollerud and [[Marla Geha]] of Yale University, Jana Grcevich and Mary Putman of Columbia University, and Daniel Stern of CalTech first reported the two galaxies in November 2014 as a result of GALFA-H I, |
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Pisces A and B were also found to be beyond the range of any significant [[Dark matter|dark-matter]] [[Galactic halo|halos]]; |
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== See Also == |
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[[Pisces A]], another void dwarf galaxy in the Local Void |
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==References== |
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==References== |
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{{reflist}} |
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{{reflist}} |
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