NGC 4214 explained

NGC 4214
Credit:HST/NASA/ESA.
Epoch:J2000
Type:IAB(s)m[1]
Z:291 ± 3 km/s
Appmag V:10.2
Size V:8.4 × 6.6
Constellation Name:Canes Venatici
Names:NGC 4228, CGCG 187-32, IRAS 12131+3636, KUG 1213+366, MCG 6-27-42, UGC 7278, PGC 39225

NGC 4214 is a dwarf barred irregular galaxy located around 10 million light-years[2] away in the constellation Canes Venatici. NGC 4214 is a member of the M94 Group.

Characteristics

NGC 4214 is both larger and brighter than the Small Magellanic Cloud[3] as well as a starburst galaxy, with the largest star-forming regions (NGC 4214-I and NGC 4214-II) in the galaxy's center. Of the two, NGC 4214-I contains a super star cluster rich in Wolf-Rayet stars and NGC 4214-II is younger (age less than 3 million years), including a number of star clusters and stellar associations.[4]

NGC 4214 also has two older super star clusters, both with an age of 200 million years and respective masses of 2.6*10.5 and 1.5*106 solar masses.[5]

Two satellites are known to exist around the vicinity of NGC 4214. One is DDO 113, which has an absolute V-band magnitude of -12.2. It stopped star formation around 1 billion years ago. Another, more recently discovered object is MADCASH-2, officially named MADCASH J121007+352635-dw. The name refers to the MADCASH (Magellanic Analog Dwarf Companions and Stellar Halos) project. It is similar to typical ultra-faint dwarf galaxies, with an absolute V-band magnitude of -9.15, except in that it shows evidence of multiple episodes of star formation in its recent past: one around 400 million years ago, and another 1.5 billion years ago.[6]

Two supernovae have been observed in NGC 4214: SN 1954A (type Ib, mag. 9.8),[7] and SN 2010U (type LBV, mag. 15.7).[8] [9]

See also

External links

Notes and References

  1. Web site: NASA/IPAC Extragalactic Database . Results for NGC 4214 . 2007-03-30.
  2. Web site: Galaxy NGC 4214: A star formation laboratory. ESA/Hubble Photo Release. ESA/Hubble. 12 May 2011.
  3. Karachentsev, Igor D. . Karachentseva, Valentina E. . Huchtmeier, Walter K. . Makarov, Dmitry I. . A Catalog of Neighboring Galaxies . The Astronomical Journal . 2003 . 127 . 4 . 2031–2068 . 2004AJ....127.2031K . 10.1086/382905. free .
  4. Ubeda, L. . Maíz-Apellániz, J. . MacKenty, J. W. . Massive Young Star Clusters in NGC 4214 . The Formation and Evolution of Massive Young Star Clusters, ASP Conference Series . H.J.G.L.M. Lamers . L.J. Smith . A. Nota. Antonella Nota . 2004 . 322 . 221 . 2004ASPC..322..221U .
  5. Larsen, Søren S. . Brodie, Jean P. . Hunter, Deidre A. . Deidre Hunter . Dynamical Mass Estimates for Five Young Massive Stellar Clusters . The Astronomical Journal . 2004 . 128 . 5 . 2295–2305 . 2004AJ....128.2295L . 10.1086/424538. astro-ph/0407373 . 36220968 .
  6. 10.3847/1538-4357/abe040. 2012.09174. 2021ApJ...909..211C. Hubble Space Telescope Observations of Two Faint Dwarf Satellites of Nearby LMC Analogs from MADCASH. 2021. Carlin. Jeffrey L.. Mutlu-Pakdil. Burçin. Crnojević. Denija. Garling. Christopher T.. Karunakaran. Ananthan. Peter. Annika H. G.. Tollerud. Erik. Forbes. Duncan A.. Hargis. Jonathan R.. Lim. Sungsoon. Romanowsky. Aaron J.. Sand. David J.. Spekkens. Kristine. Kristine Spekkens. Strader. Jay. The Astrophysical Journal. 909. 2. 211. 229297953 . free .
  7. https://www.wis-tns.org/object/1954A Transient Name Server entry for SN 1954A.
  8. https://www.wis-tns.org/object/2010U Transient Name Server entry for SN 2010U.
  9. http://www.cbat.eps.harvard.edu/cbet/002100/CBET002163.txt Central Bureau for Astronomical Telegrams No. 2163

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