| 词条 | NGC 4697 |
| 释义 |
| name = NGC 4697 | epoch = J2000 | constellation name = Virgo | image = NGC_4697_HST_10003_R850_B475.png | image_size = 280px | caption = NGC 4697 imaged by the Hubble Space Telescope | type = E6[1] | ra = {{RA|12|48|35.9}}[1] | dec = {{DEC|-05|48|03}}[1] | dist_ly = ~ 38 Mly[1] / ~ 50 Mly[2] | z = 1241 ± 1 km/s[1] | size_v = 4′.4 × 2′.8[2] | appmag_v = 10.97[1] | names = Caldwell 52, UGCA 300, MCG -01-33-010, PGC 043276[1] }}NGC 4697 (also known as Caldwell 52) is an elliptical galaxy some 40 to 50 million light-years away in the constellation Virgo. It is a member of the NGC 4697 Group, a group of galaxies also containing NGC 4731 and several generally much smaller galaxies [3] This group is about 55 million light-years away; it is one of the many Virgo II Groups, which form a southern extension of the Virgo Supercluster of galaxies.[3] The distance to NGC 4697 is not known with high precision: measurements vary from 28 to 76 million light-years.[1] According to the NASA Extra-galactic Database, the average is about 38 million light-years;[1] according to SIMBAD, about 50 million light-years.[2] The supermassive black hole at the core of NGC 4697 has a mass of {{Val|1.3e8|0.18|0.17|ul=solar mass}} as measured from Atacama Large Millimeter Array observations of the rotation of the central gas disk.[4] References1. ^1 2 3 4 5 6 7 8 {{cite web | work=NASA/IPAC Extragalactic Database | title=NED results for object NGC 4697 | url=http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+4697&extend=no | accessdate=2010-11-28 }} 2. ^1 2 {{cite simbad | title=NGC 4697 | access-date=2010-11-28 }} 3. ^1 {{cite web | title=The Virgo II Groups | work=Atlas of the Universe | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC+4697 | accessdate=2010-11-28 }} 4. ^{{cite journal |last1=Davis |first1=T. A. |last2=Bureau |first2=M. |last3=Onishi |first3=K. |last4=Cappellari |first4=M. |last5=Iguchi |first5=S. |last6=Sarzi |first6=M. |title=WISDOM Project - II. Molecular gas measurement of the supermassive black hole mass in NGC 4697 |journal=Monthly Notices of the Royal Astronomical Society |date=2017 |volume=468 |issue=4 |page=4675 |doi=10.1093/mnras/stw3217 |bibcode=2017MNRAS.468.4675D|arxiv=1703.05248 }} External links{{WikiSky}}{{Caldwell catalogue}}{{Ngc50}} 6 : Elliptical galaxies|Virgo (constellation)|NGC objects|Caldwell objects|Principal Galaxies Catalogue objects|UGCA objects |
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