| 词条 | Arp 104 |
| 释义 |
|name=Arp 104 |image=NGC 5216 from the Schulman 0.8m Telescope at the Mount Lemmon Skycenter courtesy Adam Block.jpg |caption=NGC 5216: The Keenan System, Arp 104 |credit= |epoch=J2000[1] |constellation name=Ursa Major[2] |ra={{RA|13|32|08.9}}[1] |dec={{DEC|+62|44|02}}[1] |z=0.010817[1] |dist_ly=1.73 × 107[2][7] |type=E0/SBb-pec[2] |appmag_v=14.0[3]/12.3[4] |size_v= |notes=bridged[2] |names=Keenan's system[1][2] NGC 5216/NGC 5218[1][2] UGC 8528/UGC 8529[5] VV 33a[6]/VV 33b[7]}} Arp 104, also known as Keenan's system, is entry 104 in Halton Arp's Atlas of Peculiar Galaxies catalog for spiral galaxy NGC 5216 and globular galaxy NGC 5218.[8] The two galaxies are joined by a bridge of galactic material spanning 22 000 light years.[8][9]In 1790 William Herschel discovered the galaxies, and in 1926 they were studied by Edwin Hubble.[8] In 1935 Philip C. Keenan first published a paper about the bridge connecting the galaxies,[8][10] which was rediscovered in 1958 at the Lick and Palomar observatories.[8][9][11] References1. ^1 2 3 4 5 {{cite web |url=http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=arp+104&extend=yes&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=Searching NED for object "ARP 104*" |accessdate=2008-08-02 |work=NASA/IPAC Extragalactic Database (NED) |publisher=Jet Propulsion Laboratory, California Institute of Technology}} 2. ^{{cite arXiv |eprint=astro-ph/0605015 |title=Imaging and spectroscopy of Arp 104: a post-starburst interacting pair with cross-fuelling? |last=Roche |first=Nathan |date=2006-04-29}} 3. ^{{cite web |url=http://seds.org/~spider/ngc/ngc.cgi?5216 |title=NGC 5216 |accessdate=2008-08-03 |work=The interactive NGC catalog online |publisher=Students for the Exploration and Development of Space (SEDS) }}{{dead link|date=July 2017 |bot=InternetArchiveBot |fix-attempted=yes }} 4. ^{{cite web |url=http://seds.org/~spider/ngc/ngc.cgi?5218 |title=NGC 5218 |accessdate=2008-08-03 |work=The interactive NGC catalog online |publisher=Students for the Exploration and Development of Space (SEDS) }}{{dead link|date=July 2017 |bot=InternetArchiveBot |fix-attempted=yes }} 5. ^{{cite arXiv |eprint=astro-ph/9911186 |title=The molecular gas-star formation connection in an optically-selected sample of interacting galaxies |last=Bushouse |first=Howard A. |author2=Steven D. Lord |author3=Susan A. Lamb |author4=Michael W. Werner |author5=K. Y. Lo |date=1999-11-10}} 6. ^{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+5216#lab_ident|title=VV 33a -- Interacting Galaxies|accessdate=2009-01-14|work=SIMBAD astronomical object database|publisher=Centre de Données astronomiques de Strasbourg}} 7. ^{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+5218#lab_ident|title=NGC 5218 -- Galaxy in Pair of Galaxies|accessdate=2009-01-14|work=SIMBAD astronomical object database|publisher=Centre de Données astronomiques de Strasbourg}} 8. ^1 2 3 4 5 6 7 8 9 {{cite web |url=http://www.universetoday.com/2008/07/25/bridge-across-space-keenans-system-by-martin-winder-and-dietmar-hager/ |title=Bridge Across Space: "Keenan's System" by Martin Winder and Dietmar Hager |accessdate=2008-08-02 |last=Plotner |first=Tammy |date=2008-07-25 |publisher=Universe Today |archiveurl=https://web.archive.org/web/20080730141220/http://www.universetoday.com/2008/07/25/bridge-across-space-keenans-system-by-martin-winder-and-dietmar-hager/ |archivedate=2008-07-30 |deadurl=no |df= }} 9. ^1 2 {{cite journal|last=Zwicky|first=Fritz|authorlink=Fritz Zwicky|year=1956|title=Multiple galaxies|journal=Ergebnisse der exakten Naturwissenschaften|volume=29|pages=361|bibcode=1956ErNW...29..344Z|doi=10.1007/BFb0118841|series=Ergebnisse der Exakten Naturwissenschaften|isbn=978-3-540-74717-8}} 10. ^{{cite journal|last=Keenan|first=Philip C.|date=May 1935|title=An unusual pair of nebulae: NGC 5216 and 5218|journal=Astrophysical Journal|volume=81|pages=355|doi=10.1086/143641|bibcode=1935ApJ....81..355K}} 11. ^{{cite journal|last=Vorontsov-Vel'Iaminov|first=B. A.|authorlink=Boris Vorontsov-Velyaminov|year=1958|title=The interaction of galaxies and the nature of their arms, spanning filaments and tails. The morphology of galaxies. V|journal=Astronomicheskii Zhurnal|volume=35|pages=858|bibcode=1958AZh....35..858V}} External links
2 : Arp objects|Interacting galaxies |
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