View source for Astronomy:NGC 4800

{{Short description|Galaxy in constellation Canes Venatici}}
{{Infobox galaxy
 | name               = [[Astronomy:New General Catalogue|NGC]] 4800
 | image              = File:NGC 4800 hst 09042 R814B606.png
 | caption            = [[Astronomy:Hubble Space Telescope|Hubble Space Telescope]] image of NGC 4800
 | epoch              = [[Astronomy:J2000|J2000]]
 | type               = SA(rs)b<ref name=Delgado2004/>
 | constellation name = [[Astronomy:Canes Venatici|Canes Venatici]]
 | ra                 = {{RA|12|54|37.78208}}<ref name=GaiaDR2/>
 | dec                = {{DEC|+46|31|52.2815}}<ref name=GaiaDR2/>
 | appmag_b           = 12.0<ref name=SIMBAD/>
 | z                  = 0.002972<ref name="ned" />
 | h_radial_v         = {{Val|891|17|ul=km/s}}<ref name="ned" />
 | dist_ly            = {{cvt|29.0|Mpc|Mly|order=flip|abbr=on|lk=on}}<ref name=Sorce2014/>
 | group_cluster      = 
 | mass               = <!-- In solar masses {{Val|0|e=0}} -->
 | mass_light_ratio   = <!-- In solar units  -->
 | size               = <!-- In light years  -->
 | appmag_v           = 
 | absmag_v           = 
 | size_v             = 
 | names              = [[Astronomy:New General Catalogue|NGC]] 4800, [[Astronomy:Lyon-Meudon Extragalactic Database|LEDA]] 43931, [[Astronomy:2MASX|2MASX]] J12543777+4631521<ref name=SIMBAD/>
}}

'''NGC 4800''' is an isolated<ref name=Comerón2008/> [[Spiral galaxy|spiral galaxy]] in the constellation [[Astronomy:Canes Venatici|Canes Venatici]], located at a distance of {{convert|29.0|Mpc|Mly|disp=out|lk=on|abbr=off}} from the [[Astronomy:Milky Way|Milky Way]].<ref name=Sorce2014/> It was discovered by William Herschel on April 1, 1788.<ref name=cseligman/> The [[Astronomy:Galaxy morphological classification|morphological classification]] of this galaxy is SA(rs)b,<ref name=Delgado2004/> indicating a spiral galaxy with no visual [[Astronomy:Barred spiral galaxy|bar]] at the nucleus (SA), an incomplete ring structure (rs), and moderately-tightly wound spiral arms (b). The galactic plane is inclined to the line of sight by an angle of 43°, and the long axis is oriented along a [[Astronomy:Position angle|position angle]] of 25°.<ref name=Ho2002/> There is a weak bar structure at the nucleus that is visible in the infrared.<ref name=Comerón2008/>

The galaxy has a low-luminosity [[Active galactic nucleus|active galactic nucleus]] with an HII region at the core.<ref name=Delgado2004/> The circumnuclear zone contains a double ring structure of "ultra-compact nuclear rings"; the inner ring has a radius of 30&nbsp;pc and the outer ring's radius is about 130&nbsp;pc.<ref name=Comerón2008/> The upper limit on the mass of the central [[Astronomy:Supermassive black hole|supermassive black hole]] is estimated as {{Val|2.0|e=7|ul=solar mass}}, or 20 million times the mass of the Sun.<ref name=Sarzi2002/>

==References==
{{reflist|refs=

<ref name=GaiaDR2>{{Cite Gaia DR2|1530991876354871552}}</ref>

<ref name=SIMBAD>{{cite simbad | title=NGC 4800 | access-date=31 May 2019}}</ref>

<ref name=Delgado2004>{{cite journal
 | title=The Stellar Populations of Low-Luminosity Active Galactic Nuclei. II. Space Telescope Imaging Spectrograph Observations
 | last1=González Delgado | first1=Rosa M. | last2=Cid Fernandes | first2=Roberto
 | last3=Pérez | first3=Enrique | last4=Martins | first4=Lucimara P.
 | last5=Storchi-Bergmann | first5=Thaisa | last6=Schmitt | first6=Henrique
 | last7=Heckman | first7=Timothy | last8=Leitherer | first8=Claus
 | display-authors=1 | journal=The Astrophysical Journal
 | volume=605 | issue=1 | pages=127–143 | date=April 2004
 | doi=10.1086/382216 | arxiv=astro-ph/0401414
 | bibcode=2004ApJ...605..127G | s2cid=119471662 }}</ref>

<ref name=Sarzi2002>{{cite journal
 | title=Limits on the Mass of the Central Black Hole in 16 Nearby Bulges
 | display-authors=1 | last1=Sarzi | first1=Marc
 | last2=Rix | first2=Hans-Walte | last3=Shields | first3=Joseph C.
 | last4=McIntosh | first4=Daniel H. | last5=Ho | first5=Luis C.
 | last6=Rudnick | first6=Gregory | last7=Filippenko | first7=Alexei V.
 | last8=Sargent | first8=Wallace L. W. | last9=Barth | first9=Aaron J.
 | journal=The Astrophysical Journal
 | volume=567 | issue=1 | pages=237–246 | date=March 2002
 | doi=10.1086/338351 | arxiv=astro-ph/0110673
 | bibcode=2002ApJ...567..237S | s2cid=50115334 }}</ref>

<ref name=Ho2002>{{cite journal
 | title=An Efficient Strategy to Select Targets for Gasdynamical Measurements of Black Hole Masses Using the Hubble Space Telescope
 | display-authors=1 | last1=Ho | first1=Luis C.
 | last2=Sarzi | first2=Marc | last3=Rix | first3=Hans-Walter
 | last4=Shields | first4=Joseph C. | last5=Rudnick | first5=Greg
 | last6=Filippenko | first6=Alexei V. | last7=Barth | first7=Aaron J.
 | journal=The Publications of the Astronomical Society of the Pacific
 | volume=114 | issue=792 | pages=137–143 | date=February 2002
 | doi=10.1086/338546 | arxiv=astro-ph/0110671
 | bibcode=2002PASP..114..137H | s2cid=17982236 }}</ref>

<ref name=Comerón2008>{{cite journal
 | title=Discovery of ultra-compact nuclear rings in three spiral galaxies
 | last1=Comerón | first1=S. | last2=Knapen | first2=J. H.
 | last3=Beckman | first3=J. E. | last4=Shlosman | first4=I.
 | display-authors=1 | journal=Astronomy and Astrophysics
 | volume=478 | issue=2 | date=February 2008 | pages=403–407
 | doi=10.1051/0004-6361:20078845 | arxiv=0711.4230
 | bibcode=2008A&A...478..403C | s2cid=14678950 }}</ref>

<ref name=Sorce2014>{{cite journal
 | title=From Spitzer Galaxy photometry to Tully-Fisher distances
 | last1=Sorce | first1=J. G. | last2=Tully | first2=R. B.
 | last3=Courtois | first3=H. M. | last4=Jarrett | first4=T. H.
 | last5=Neill | first5=J. D. | last6=Shaya | first6=E. J.
 | display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society
 | volume=444 | issue=1 | pages=527–541 | date=October 2014
 | doi=10.1093/mnras/stu1450 | arxiv=1408.0729
 | bibcode=2014MNRAS.444..527S }}</ref>

<ref name="ned">{{cite web
 | title=NASA/IPAC Extragalactic Database
 | url=http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+4800
 | website=ned.ipac.caltech.edu | access-date=31 May 2019 }}</ref>

<ref name=cseligman>{{cite web
 | last1=Seligman | first1=Courtney
 | title=New General Catalog Objects: NGC 4800 - 4849
 | url=https://cseligman.com/text/atlas/ngc48.htm
 | website=New General Catalog Objects: NGC 4800 - 4849
 | access-date=31 May 2019 }}</ref>

}}

==External links==
{{WikiSky}}


{{DEFAULTSORT:NGC 4800}}
[[Category:Unbarred spiral galaxies]]
[[Category:Canes Venatici]]
[[Category:NGC objects|4800]]
[[Category:Principal Galaxies Catalogue objects|043931]]

{{Sourceattribution|NGC 4800}}