NGC 4214
Template:Short description Template:Infobox Galaxy NGC 4214 is a dwarf barred irregular galaxy located around 10 million light-years[1] away in the constellation Canes Venatici. It was discovered on 28 April 1785 by German-British astronomer William Herschel.[2] 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 Script error: No such module "val". and Script error: No such module "val". 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]
One supernova has been observed in NGC 4214: SN 1954A (type Ib, mag. 9.8) was discovered by Paul Wild on 30 May 1954.[7] [Note: some sources incorrectly list the discovery date as 10 April 1954.][8] In addition, the galaxy has hosted one luminous blue variable: SN 2010U (type LBV, mag. 16) was discovered by Kōichi Itagaki on 5 February 2010.[9][10]
See also
- NGC 4236 – a similar irregular galaxy
- List of NGC objects (4001–5000)
References
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