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- Q1109807 subject Q1031119.
- Q1109807 subject Q7033665.
- Q1109807 subject Q7152550.
- Q1109807 subject Q7215991.
- Q1109807 abstract "NGC 4203 is the New General Catalogue identifier for a lenticular galaxy in the northern constellation of Coma Berenices. It was discovered on March 20, 1787 by English astronomer William Herschel, and is situated 5.5° to the northwest of the 4th magnitude star Gamma Comae Berenices and can be viewed with a small telescope. The morphological classification of NGC 4203 is SAB0−, indicating that it has a lenticular form with tightly wound spiral arms and a weak bar structure at the nucleus.This galaxy has a fairly large reservoir of neutral hydrogen containing on the order of a billion solar masses (M☉), but it is only undergoing a low rate of new star formation. Hence, the inner star formation of the galaxy is fairly old; roughly ten billion years on average. The neutral hydrogen is arranged in two ring-like structures, with the outer ring having nine times the mass of the inner. In the central region there is around 7007250000000000000♠2.5×107 M☉ of molecular hydrogen, plus dust structures within 980 ly (300 pc) of the nucleus. The gas in the outer disk may have been accreted from the inter-galactic medium, or captured during a close encounter with a dwarf galaxy.The nucleus of the galaxy contains a low-ionization nuclear emission-line region of type 1.9. This is being generated by a supermassive black hole of an estimated 7007600000000000000♠(6±1)×107 M☉. An influx of gas of around 6998200000000000000♠2×10−2 M☉/yr is sufficient to explain the measured X-ray luminosity. The time-varying emissions from the region are perhaps best explained by an infalling asymptotic giant branch star that is losing mass to the black hole along a contrail.".
- Q1109807 wikiPageWikiLink Q1031119.
- Q1109807 wikiPageWikiLink Q115462.
- Q1109807 wikiPageWikiLink Q14277.
- Q1109807 wikiPageWikiLink Q14534.
- Q1109807 wikiPageWikiLink Q1648748.
- Q1109807 wikiPageWikiLink Q180892.
- Q1109807 wikiPageWikiLink Q190438.
- Q1109807 wikiPageWikiLink Q192078.
- Q1109807 wikiPageWikiLink Q2488.
- Q1109807 wikiPageWikiLink Q2490.
- Q1109807 wikiPageWikiLink Q2557101.
- Q1109807 wikiPageWikiLink Q2703.
- Q1109807 wikiPageWikiLink Q40392.
- Q1109807 wikiPageWikiLink Q50089.
- Q1109807 wikiPageWikiLink Q5098240.
- Q1109807 wikiPageWikiLink Q615925.
- Q1109807 wikiPageWikiLink Q6709611.
- Q1109807 wikiPageWikiLink Q7033665.
- Q1109807 wikiPageWikiLink Q7152550.
- Q1109807 wikiPageWikiLink Q7215991.
- Q1109807 wikiPageWikiLink Q8928.
- Q1109807 wikiPageWikiLink Q9285.
- Q1109807 name "NGC 4203".
- Q1109807 names "2".
- Q1109807 type Place.
- Q1109807 type CelestialBody.
- Q1109807 type Galaxy.
- Q1109807 type Location.
- Q1109807 type Place.
- Q1109807 type Thing.
- Q1109807 type Q318.
- Q1109807 comment "NGC 4203 is the New General Catalogue identifier for a lenticular galaxy in the northern constellation of Coma Berenices. It was discovered on March 20, 1787 by English astronomer William Herschel, and is situated 5.5° to the northwest of the 4th magnitude star Gamma Comae Berenices and can be viewed with a small telescope.".
- Q1109807 label "NGC 4203".
- Q1109807 name "2MASXJ12150502+3311500,LEDA39158,UGC7256,UZCJ121505.0+331152,Z187-29 .".
- Q1109807 name "NGC 4203".