Pisces A

This article is about the void galaxy. For the Triangulum satellite galaxy, see Pisces Dwarf.
Not to be confused with Alpha Piscium.
Pisces A
Hubble Space Telescope image of Pisces A
Observation data (J2000.0[1] epoch)
ConstellationPisces
Right ascension00h 14m 46.000s[1]
Declination+10° 48′ 47.01″[1]
Distance18.4 Mly (5.64 Mpc)[2]
Absolute magnitude (V)−11.57+0.06
−0.05[2]
Characteristics
Mass1×107[2] M☉
Size145+5
−6[2] pc
Other designations
Pisces A,[1] PSC A, GALFA-Dw1[1]

Pisces A (Psc A) is a void dwarf galaxy. It is located in the Local Void, near Pisces B; and is in the Pisces constellation. It is 18.4 million light-years (5.64 megaparsecs) away from Earth.[2] The galaxy was discovered with the WIYN Observatory. About 100 million years ago, the galaxy started moving out of the void and into the local filament zone and denser gaseous environment. This sparked off a doubling of the rate of star formation.[3]

References

  1. ^ a b c d e "[SCB2015] GALFA-Dw1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 February 2018.
  2. ^ a b c d e Tollerud, Erik J; Geha, Marla C; Grcevich, Jana; Putman, Mary E; Weisz, Daniel R; Dolphin, Andrew E (2016). "Hstimaging of the Local Volume Dwarf Galaxies Pisces A and B: Prototypes for Local Group Dwarfs". The Astrophysical Journal. 827 (2): 89. arXiv:1607.03487. Bibcode:2016ApJ...827...89T. doi:10.3847/0004-637X/827/2/89. S2CID 118804470.
  3. ^ "Hubble uncovers a galaxy pair coming in from the wilderness". Science Daily. 11 August 2016.

Further reading


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