| 词条 | NGC 4660 |
| 释义 |
| name = NGC 4660 | image = | caption = HST image of NGC 4660. | epoch = J2000 | type = E5[1] | ra = {{RA|12|44|32.0}}[1] | dec = {{DEC|11|11|26}}[1] | dist_ly = {{convert|19.2|Mpc|Mly|abbr=on|lk=on|order=flip}}[1] | group_cluster = Virgo Cluster | h_radial_v = 1083 km/s[1] | z = 0.003612[1] | appmag_v = 12.16[1] | size_v = 2.2 x 1.6[1] | constellation name = Virgo | names = CGCG 71-23, MCG 2-33-6, PGC 42917, UGC 7914, VCC 2000[1] |size=~{{convert|12.10|kpc|ly|abbr=on|lk=on|order=flip}} (estimated)[1]}}NGC 4660 is an elliptical galaxy located about 63 million light-years away[2] in the constellation Virgo.[3] The galaxy was discovered by astronomer William Herschel on March 15, 1784[4] and is a member of the Virgo Cluster.[5][6] NGC 4660 forms a tight pair with Messier 59.[7] Tidal filamentA long tidal filament was detected associated with NGC 4660. This appears to indicate a past gravitational interaction with another galaxy. The progenitor galaxy that may have produced the filament associated with NGC 4660 was a gas-rich spiral. Alternatively, the detection of tidal dwarf galaxies[6] (TDGs) which are “recycled” low-mass galaxies formed from interactions or mergers[8] suggest that the filament originated from a possible satellite galaxy that got stripped during its closest approach in its orbit to NGC 4660. This would make the filament a tidal stream comparable to the stream associated with the Sagittarius Dwarf Spheroidal Galaxy of the Milky Way.[6] Supermassive Black HoleNGC 4660 may have a supermassive black hole with an estimated mass of 800 million suns ({{Val|8|e=8}} M☉).[9] See also
References1. ^1 2 3 4 5 6 7 8 9 {{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 4660 | url=http://nedwww.ipac.caltech.edu/ | accessdate=2018-04-07}} 2. ^{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+4660&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES|title=Your NED Search Results|website=ned.ipac.caltech.edu|access-date=2018-04-07}} 3. ^{{Cite web|url=https://www.spacetelescope.org/images/heic0815b/|title=NGC 4660 in the Virgo cluster of galaxies|last=information@eso.org|website=www.spacetelescope.org|language=en-GB|access-date=2018-04-07}} 4. ^{{Cite web|url=http://cseligman.com/text/atlas/ngc46a.htm#4660|title=New General Catalog Objects: NGC 4650 - 4699|last=|first=|date=|website=cseligman.com|language=en-US|archive-url=|archive-date=|dead-url=|access-date=2018-04-05}} 5. ^{{Cite journal|last=Binggeli|first=B.|last2=Sandage|first2=A.|last3=Tammann|first3=G. A.|date=1985-09-01|title=Studies of the Virgo Cluster. II - A catalog of 2096 galaxies in the Virgo Cluster area.|bibcode=1985AJ.....90.1681B|journal=The Astronomical Journal|volume=90|pages=1681–1759|doi=10.1086/113874|issn=0004-6256}} 6. ^1 2 {{Cite journal|last=Kemp|first=S. N.|last2=Martínez-Robles|first2=C.|last3=Márquez-Lugo|first3=R. A.|last4=Zepeda-García|first4=D.|last5=Franco-Hernández|first5=R.|last6=A. Nigoche-Netro|last7=Ramos-Larios|first7=G.|last8=Navarro|first8=S. G.|last9=Corral|first9=L. J.|date=2016|title=The Tidal Filament of NGC 4660|url=http://stacks.iop.org/0004-637X/830/i=2/a=66|journal=The Astrophysical Journal|language=en|volume=830|issue=2|pages=66|doi=10.3847/0004-637x/830/2/66|issn=0004-637X|arxiv=1607.04670|bibcode=2016ApJ...830...66K}} 7. ^{{Cite journal|last=Mamon|first=G. A.|date=2008-07-01|title=The nature of the nearest compact group of galaxies from precise distance measurements|journal=Astronomy & Astrophysics|language=en|volume=486|issue=1|pages=113–117|doi=10.1051/0004-6361:200809827|issn=0004-6361|arxiv=0803.3181|bibcode=2008A&A...486..113M}} 8. ^{{Cite web|url=http://astronomy.case.edu/2015/09/22/galaxy-recycling-the-origins-of-tidal-dwarf-galaxies/|title=Galaxy Recycling: the Origins of Tidal Dwarf Galaxies {{!}} Department of Astronomy|website=astronomy.case.edu|language=en-US|access-date=2018-04-08}} 9. ^{{Cite journal|last=Pechetti|first=Renuka|last2=Seth|first2=Anil|last3=Cappellari|first3=Michele|last4=McDermid|first4=Richard|last5=Brok|first5=Mark den|last6=Mieske|first6=Steffen|last7=Strader|first7=Jay|date=2017-11-13|title=Detection of Enhanced Central Mass-to-light Ratios in Low-mass Early-type Galaxies: Evidence for Black Holes?|url=http://stacks.iop.org/0004-637X/850/i=1/a=15?key=crossref.0e2735daa49f56f0600addc374ec2cd7|journal=The Astrophysical Journal|volume=850|issue=1|pages=15|doi=10.3847/1538-4357/aa9021|issn=1538-4357|arxiv=1709.09172|bibcode=2017ApJ...850...15P}} External links{{WikiSky}}{{Ngc50}} 7 : Virgo (constellation)|Elliptical galaxies|NGC objects|Principal Galaxies Catalogue objects|UGC objects|Astronomical objects discovered in 1784|Virgo Cluster |
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