| 词条 | NGC 3840 |
| 释义 |
| name = NGC 3840 | image = | caption = SDSS image of NGC 3840 | epoch = J2000 | type = Sa[1] | ra = {{RA|11|43|58.9}}[1] | dec = {{DEC|20|04|37}}[1] | dist_ly = {{convert|97.5|Mpc|Mly|abbr=on|lk=on|order=flip}}[1] | group_cluster = Leo Cluster | h_radial_v = 7372 km/s[1] | z = 0.024590[1] | appmag_v = 14.54[1] | size_v = 1.1 x 0.8[1] | constellation name = Leo | names = CGCG 97-91, IRAS 11413+2021, MCG 3-30-70, PGC 36477, UGC 6702[1] |size=~{{convert|32.32|kpc|ly|abbr=on|lk=on|order=flip}} (estimated)[1] }}NGC 3840 is a spiral galaxy[2] located about 320 million light-years away[3] in the constellation Leo.[4] The galaxy was discovered by astronomer Heinrich d'Arrest on May 8, 1864.[5] NGC 3840 is a member of the Leo Cluster.[6][7][8] The galaxy is rich in neutral atomic hydrogen (H I) and is not interacting with its environment.[9] NGC 3840 is likely to be a low-luminosity AGN (LLAGN).[10] See also
External links{{WikiSky}}References1. ^1 2 3 4 5 6 7 8 9 {{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 3840 | url=http://nedwww.ipac.caltech.edu/ | accessdate=2018-07-12}} {{Ngc40}}2. ^{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+3840&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=2018-07-12}} 3. ^{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3840|title=NED Query Results for NGC 3840|website=ned.ipac.caltech.edu|language=en-US|access-date=2018-07-12}} 4. ^{{Cite web|url=http://spider.seds.org/ngc/revngcic.cgi?NGC3840|title=Revised NGC Data for NGC 3840|website=spider.seds.org|access-date=2018-07-12}} 5. ^{{Cite web|url=https://cseligman.com/text/atlas/ngc38.htm#3840|title=New General Catalog Objects: NGC 3800 - 3849|last=|first=|date=|website=cseligman.com|language=en-US|archive-url=|archive-date=|dead-url=|access-date=2018-07-09}} 6. ^{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/NEDatt?objname=NGC+3840|title=Detailed Object Classifications|website=ned.ipac.caltech.edu|access-date=2018-07-12}} 7. ^{{Cite news|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC++3840&NbIdent=query_hlinks&Coord=11+43+58.9643701127+20+04+37.306253441&parents=4&submit=parents&siblings=583&hlinksdisplay=h_all|title=NGC 3840|access-date=2018-07-12}} 8. ^{{Cite web|url=http://leda.univ-lyon1.fr/fG.cgi?n=a104&sql=parent=4599746|title=Hierarchy catalogue|website=leda.univ-lyon1.fr|access-date=2018-07-12}} 9. ^{{Cite journal|last=Scott|first=T. C.|last2=Bravo-Alfaro|first2=H.|last3=Brinks|first3=E.|last4=Caretta|first4=C. A.|last5=Cortese|first5=L.|last6=Boselli|first6=A.|last7=Hardcastle|first7=M. J.|last8=Croston|first8=J. H.|last9=Plauchu|first9=I.|date=2010-04-11|title=Probing evolutionary mechanisms in galaxy clusters: neutral atomic hydrogen in Abell 1367|journal=Monthly Notices of the Royal Astronomical Society|language=en|volume=403|issue=3|pages=1175–1192|doi=10.1111/j.1365-2966.2009.16204.x|issn=0035-8711|arxiv=1001.3900|bibcode=2010MNRAS.403.1175S}} 10. ^{{Cite journal|last=Sun|first=M.|last2=Vikhlinin|first2=A.|last3=Forman|first3=W.|last4=Jones|first4=C.|last5=Murray|first5=S. S.|date=2005|title=The Survival and Destruction of X-Ray Coronae of Early-Type Galaxies in Rich Cluster Environments: A Case Study of A1367|url=http://stacks.iop.org/0004-637X/619/i=1/a=169|journal=The Astrophysical Journal|language=en|volume=619|issue=1|pages=169–177|doi=10.1086/425298|issn=0004-637X|arxiv=astro-ph/0408425|bibcode=2005ApJ...619..169S}} 8 : NGC objects|Principal Galaxies Catalogue objects|UGC objects|Leo (constellation)|Leo Cluster|Spiral galaxies|Astronomical objects discovered in 1864|Active galaxies |
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