NGC 5793

{{short description|Spiral galaxy in the constellation Libra}} {{Infobox galaxy | name = | image = File:Secrets at the heart of NGC 5793.jpg | caption = [[Hubble Space Telescope]] image of NGC 5793<ref name=Hubble/> | alt = | epoch = [[J2000]] | pronounce = | constellation name = [[Libra (constellation)|Libra]] | ra = {{RA|14|59|24.807}}<ref name=Skrutskie_et_al_2006/> | dec = {{DEC|-16|41|36.55}}<ref name=Skrutskie_et_al_2006/> | z = 0.011645<ref name="ned" /> | h_radial_v = {{val|3442|72|u=km/s|fmt=commas}}<ref name=Hagiwara_et_al_2000/> | gal_v = | dist_ly = {{cvt|46|Mpc|Mly|order=flip|lk=on}}<ref name=Hagiwara_et_al_2000/> | group_cluster = | type = Sb, Seyfert 2e<ref name=Hagiwara_et_al_2000/> | mass =  | mass_light_ratio =  | size =  | stars = | appmag_v = 13.32<ref name=Véron-Cetty_2010/> | appmag_b = 14.47<ref name=Véron-Cetty_2010/> | absmag_v = | size_v = {{val|1.160|ul=arcminute}}{{nowrap| × }}{{val|0.394|u=arcminute}}<ref name=Skrutskie_et_al_2006/> ([[Near infrared|NIR]]) | half_light_radius_pc =  | half_light_radius_arcminsec =  | h1_scale_length_pc =  | h1_scale_length_arcminsec =  | xray_radius_pc =  | xray_radius_arcminsec =  | notes = | names = {{odlist | NGC=5793 | LEDA=49264 | 2MASX=J14592480-1641365 }}<ref name=SIMBAD/> | references = }}

'''NGC 5793''' is an [[active galactic nucleus|active]] [[spiral galaxy]] located approximately 150 million [[light years]] away in the constellation [[Libra (constellation)|Libra]]. It is classified as a Type 2 [[Seyfert galaxy]]<ref name=Hagiwara_et_al_2000/> and was discovered by [[Francis Preserved Leavenworth|Francis Leavenworth]] in 1886.<ref name=Hubble/><ref name=Seligman/> The [[galactic plane]] is inclined at an angle of 73°, giving it an oval, nearly edge-on appearance with the major axis aligned along a [[position angle]] of 150°.<ref name=Hagiwara_et_al_2000/>

Seyfert galaxies such as NGC 5793 are known to house [[megamasers]]. Megamasers can have a luminosity of thousands of times greater than the [[Sun]].<ref name=Hubble/> [[Neutral hydrogen]] has been detected against the galactic nucleus. This means that NGC 5793 has an estimated HI cloud size of ≈15 pc and an estimated atomic gas density of ≈200 cm -3.<ref name=Pihlström_et_al_1999/>

==References== <references> <ref name=SIMBAD>{{cite simbad|title=NGC 5793|access-date=30 May 2019}}</ref>

<ref name=Skrutskie_et_al_2006>{{cite journal | title=The Two Micron All Sky Survey (2MASS) | display-authors=1 | last1=Skrutskie | first1=Michael F. | last2=Cutri | first2=Roc M. | last3=Stiening | first3=Rae | last4=Weinberg | first4=Martin D. | last5=Schneider | first5=Stephen E. | last6=Carpenter | first6=John M. | last7=Beichman | first7=Charles A. | last8=Capps | first8=Richard W. | last9=Chester | first9=Thomas | last10=Elias | first10=Jonathan H. | last11=Huchra | first11=John P. | last12=Liebert | first12=James W. | last13=Lonsdale | first13=Carol J. | last14=Monet | first14=David G. | last15=Price | first15=Stephan | last16=Seitzer | first16=Patrick | last17=Jarrett | first17=Thomas H. | last18=Kirkpatrick | first18=J. Davy | last19=Gizis | first19=John E. | last20=Howard | first20=Elizabeth V. | last21=Evans | first21=Tracey E. | last22=Fowler | first22=John W. | last23=Fullmer | first23=Linda | last24=Hurt | first24=Robert L. | last25=Light | first25=Robert M. | last26=Kopan | first26=Eugene L. | last27=Marsh | first27=Kenneth A. | last28=McCallon | first28=Howard L. | last29=Tam | first29=Robert | last30=Van Dyk | first30=Schuyler D. | last31=Wheelock | first31=Sherry L. | journal=The Astronomical Journal | date=1 February 2006 |volume=131 | issue=2 |pages=1163–1183 | doi=10.1086/498708 | issn=0004-6256 | bibcode=2006AJ....131.1163S | s2cid=18913331 | doi-access=free }}</ref>

<ref name=Véron-Cetty_2010>{{cite journal | last1=Véron-Cetty | first1=M.-P. | last2=Véron | first2=P. | title=A catalogue of quasars and active nuclei: 13th edition | journal=[[Astronomy & Astrophysics]] | year=2010 | volume=518 | number=A10 | pages=A10 | doi=10.1051/0004-6361/201014188 | doi-access=free | bibcode=2010A&A...518A..10V }}</ref>

<ref name=Hagiwara_et_al_2000>{{cite journal | title=Probing circumnuclear molecular gas in NGC 5793 with OH absorption | last1=Hagiwara | first1=Y. | last2=Diamond | first2=P. J. | last3=Nakai | first3=N. | last4=Kawabe | first4=R. | display-authors=1 | journal=Astronomy and Astrophysics | volume=360 | page=49-56 | date=August 2000 | bibcode=2000A&A...360...49H }}</ref>

<ref name=Pihlström_et_al_1999>{{cite journal | title=VLBI observations of high-opacity HI gas in NGC 5793 | display-authors=1 | last1=Pihlström | first1=Y. M. | last2=Conway | first2=J. E. | last3=Booth | first3=R. S. | last4=Diamond | first4=P.J. | last5=Koribalski | first5=B. | journal=New Astronomy Reviews | date=November 1999 | volume=43 | issue=8–10 | pages=647–650 | doi=10.1016/S1387-6473(99)00071-8 | bibcode=1999NewAR..43..647P }}</ref>

<ref name="ned">{{cite web | title=NASA/IPAC Extragalactic Database | url=http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+5793 | website=ned.ipac.caltech.edu | publisher=California Institute of Technology | access-date=30 May 2019 }}</ref>

<ref name=Hubble>{{cite web | title=Secrets at the heart of NGC 5793 | url=https://www.spacetelescope.org/images/potw1411a/ | website=www.spacetelescope.org | date=March 17, 2014 | publisher=ESA | access-date=30 May 2019 | language=en }}</ref>

<ref name=Seligman>{{cite web | last1=Seligman | first1=Courtney | title=New General Catalog Objects: NGC 5750 - 5799 | url=https://cseligman.com/text/atlas/ngc57a.htm | website=New General Catalog Objects: NGC 5750 - 5799 | access-date=30 May 2019 }}</ref> </references>

==External links== * {{commons category-inline}} {{WikiSky}}

{{DEFAULTSORT:NGC 5793}} [[Category:Spiral galaxies]] [[Category:Seyfert galaxies]] [[Category:NGC objects|5793]] [[Category:Libra (constellation)]]