| 词条 | NGC 4314 |
| 释义 |
| name = NGC 4314 | image = NGC_4314HST1998-21-b-full.jpg | image_size = 250px |caption= A Hubble Space Telescope (HST) image of the nuclear starbust ring of NGC 4314. | credit= HST/NASA/ESA | epoch = J2000 | type = SB(rs)a[1] | ra = {{RA|12|22|32}}[1] | dec = {{DEC|+29|53|43}}[1] | dist_ly = | z = 963 ± 5 km/s[1] | appmag_v = 11.4[1] | size_v = 4′.2 × 3′.7[1] | constellation name = Coma Berenices | notes = | names = UGC 7443,[1] PGC 40097[1] }} NGC 4314 is a barred spiral galaxy approximately 40 million light-years away in the constellation Coma Berenices. Perhaps the most prominent and unusual feature is its "nuclear starbust ring" of bright young stars. These rings are thought to be due in part to Lindblad resonance. It is thought that this explosion of star formation has occurred over the past few millions of years. This time frame is remarkably short in astronomical terms because most main sequence stars have lifetimes of billions of years and their birth is not usually uniform throughout a galaxy. Further study will be required to understand more about the evolution of such ring structures in galaxies. NGC 4314 is a member of the Coma I Group.[2] See also
External links
References1. ^1 2 3 4 5 6 7 {{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 4314 | url=http://ned.ipac.caltech.edu/ui/?q=objsearch&omegam=0.27&extend=no&out_csys=Equatorial&objname=Ngc%204314&hconst=73&img_stamp=YES&list_limit=5&of=pre_text&out_equinox=J2000.0&corr_z=1&omegav=0.73&obj_sort=RA%20or%20Longitude#EssentialNote_0 | accessdate=2007-04-05}} {{Ngc45}}{{galaxy-stub}}2. ^{{Cite journal|last=Gregory|first=Stephen A.|last2=Thompson|first2=Laird A.|date=April 1977|title=The Coma i Galaxy Cloud|bibcode=1977ApJ...213..345G|journal=The Astrophysical Journal|volume=213|pages=345–350|doi=10.1086/155160|issn=0004-637X}} 6 : Barred spiral galaxies|Coma Berenices (constellation)|NGC objects|UGC objects|Principal Galaxies Catalogue objects|Coma I Group |
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