View source for NGC 5005

{{Short description|Galaxy in the constellation Canes Venatici}}
{{Sky|13|10|56.2648|+|37|03|32.559}}
{{Infobox Galaxy
| name = [[New General Catalogue|NGC]] 5005
| image = Caldwell 29 (50191857313).jpg
| caption = NGC 5005 imaged by the [[Hubble Space Telescope]]
| constellation name = [[Canes Venatici (constellation)|Canes Venatici]]<ref name="sinnott1988">{{cite book 
  | editor=R. W. Sinnott
  | title= The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer
  | date=1988
  | publisher=Sky Publishing Corporation and Cambridge University Press
  | isbn=978-0-933346-51-2}}</ref>
| type = SAB(rs)bc<ref name="ned">{{cite web
  | website=NASA/IPAC Extragalactic Database
  | publisher = [[NASA]] and [[California Institute of Technology|Caltech]]
  | title=Results for object NGC 5005
  | url=https://ned.ipac.caltech.edu/byname?objname=NGC+5005
  | access-date=2006-08-24<!--, 2010-11-23 -->}}</ref>
| epoch = [[J2000]]
| ra = {{RA|13|10|56.2648}}<ref name="ned" />
| dec = {{DEC|+37|03|32.559}}<ref name="ned" />
| dist_ly = {{convert|20.075 ± 1.133|Mpc|Mly|abbr=on|lk=on|order=flip}}{{r|ned}}
| h_radial_v = 946 ± 5 km/[[second|s]]<ref name="ned" />
| z = 0.003156 ± 0.000017
| appmag_v = 10.6<ref name="ned" />
| size_v = {{Val|5.8|×|2.8|u=arcminute}}<ref name="ned" />
| size = ~{{convert|38.46|kpc|ly|abbr=on|lk=on|order=flip}} (estimated){{r|ned}}
| names = {{odlist | IRAS= 13086+3719 | MCG= +06-29-052 | CGCG= 189-035 | UGC= 8256 | PGC= 45749 | C=29}}{{r|ned}}
}}

'''NGC 5005''', also known as '''Caldwell 29''', is an inclined [[spiral galaxy]] in the constellation [[Canes Venatici]]. It was discovered by German-British astronomer [[William Herschel]] on 1 May 1785.<ref>{{cite journal |last=Herschel |first=W. |date=1789 |title=Catalogue of a Second Thousand of New Nebulae and Clusters of Stars; with a Few Introductory Remarks on the Construction of the Heavens |journal=[[Philosophical Transactions of the Royal Society of London]] |volume=79 |pages=212–255  |bibcode=1789RSPT...79..212H |doi=10.1098/rstl.1789.0021 |doi-access=free}}</ref><ref name="selig">{{cite web | url = https://cseligman.com/text/atlas/ngc50.htm#5005 | title = New General Catalogue Objects: NGC{{nbsp}}6261 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 17 June 2025 }}</ref> The galaxy has a relatively bright nucleus and a bright disk that contains multiple dust lanes.<ref name="carnegieatlas" >{{cite book 
| author=A. Sandage | author2=J. Bedke
| date=1994
| title=Carnegie Atlas of Galaxies
| publisher=[[Carnegie Institution of Washington]]
| location=Washington, D.C.
| isbn=978-0-87279-667-6}}</ref>  The galaxy's high surface brightness makes it an object that is visible to amateur astronomers using large amateur telescopes.

Distance measurements for NGC 5005 vary from 13.7 [[parsec|megaparsecs]] (45 million [[light-year]]s) to 34.6 megaparsecs (113 million light-years), averaging about 20 megaparsecs (65 million light-years).<ref name="ned"/>

==Supernova==
One [[supernova]] has been observed in NGC 5005: SN 1996ai ([[type Ia supernova|Type&nbsp;Ia]], mag. 14.5) was discovered by Claudio Bottari on 16 June 1996.<ref>{{cite journal | bibcode=1996IAUC.6422....1B| title=Supernova 1996ai in NGC 5005| last1=Bottari| first1=C.| last2=Nakano| first2=S.| last3=Kushida| first3=Y.| last4=Garnavich| first4=P.| last5=Challis| first5=P.| last6=Kirshner| first6=R.| last7=Berlind| first7=P.| last8=Kleyna| first8=J.| journal=International Astronomical Union Circular| date=1996| issue=6422| page=1 | url=http://www.cbat.eps.harvard.edu/iauc/06400/06422.html#Item1}}</ref><ref>{{cite web | website=Transient Name Server | title=SN{{nbsp}}1996ai | url=https://www.wis-tns.org/object/1996ai | publisher = [[International_Astronomical_Union|IAU]] | access-date=9 December 2024}}</ref>

==Nucleus==

NGC 5005 contains a [[low ionization nuclear emission region]] (LINER) nucleus.<ref name="hoetal1997">{{cite journal
  | author= L. C. Ho | author2= A. V. Filippenko | author3= W. L. W. Sargent
  | title=A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies
  | journal=Astrophysical Journal Supplement
  | date=1997
  | volume=112
  | issue= 2
  | pages=315–390
  | bibcode=1997ApJS..112..315H
  | doi=10.1086/313041 |arxiv = astro-ph/9704107 | s2cid= 17086638 }}</ref>  LINER nuclei contain weakly [[ion]]ized gas.  The power source for the LINER emission has been debated extensively, with some researchers suggesting that LINERs are powered by [[active galactic nuclei]] that contain [[supermassive black hole]]s and other researchers suggesting that LINERs are powered by [[star formation]] activity.

===X-ray emission===

X-ray observations of NGC 5005 have revealed that it contains a variable, point-like hard [[X-ray]] source in its nucleus.<ref name="terashimaetal2002">{{cite journal
  | author= Y. Terashima | author2= N. Iyomoto | author3= L. C. Ho | author4= A. F. Ptak
  | title=X-Ray Properties of LINERs and Low-Luminosity Seyfert Galaxies Observed with ASCA. I. Observations and Results
  | journal=Astrophysical Journal Supplement
  | date=2002
  | volume=139
  | issue= 1
  | pages=1–36
  | bibcode=2002ApJS..139....1T
  | doi=10.1086/324373|arxiv = astro-ph/0203005 | s2cid= 1749977 }}</ref>  These results imply that NGC 5005 contains a [[supermassive black hole]].  The strong, variable X-ray emission is characteristic of the emission expected from the hot, compressed gas in the environment outside a black hole in an [[active galactic nucleus]].

==Companion galaxy==
NGC 5005 and the nearby spiral galaxy [[NGC 5033]] comprise a physical galaxy pair.<ref name="helouetal1982">{{cite journal
  | author= G. Helou | author2= E. E. Salpeter | author3= Y. Terzian
  | title= Neutral hydrogen in binary and multiple galaxies
  | journal=Astronomical Journal
  | date=1982
  | volume=87
  | pages=1443–1464
  | bibcode=1982AJ.....87.1443H
  | doi= 10.1086/113235 }}</ref>  The two galaxies weakly influence each other gravitationally, but they are not yet close enough to each other to be distorted by the [[galactic tide|tidal forces]] of the gravitational interaction.

== See also ==
* [[List of NGC objects (5001–6000)]]

==Notes==
{{reflist}}

==External links==
*{{commonscat-inline}}
*{{WikiSky}}

{{Catalogs|NGC=5005|UGC=8256|PGC=45749|C=29}}
{{Caldwell catalogue}}
{{Ngc55}}
{{Canes Venatici}}

{{DEFAULTSORT:NGC 5005}}
[[Category:Intermediate spiral galaxies]]
[[Category:LINER galaxies]]
[[Category:Canes Venatici]]
[[Category:NGC objects|5005]]
[[Category:UGC objects|08256]]
[[Category:Principal Galaxies Catalogue objects|045749]]
[[Category:Caldwell objects|029b]]
[[Category:Discoveries by William Herschel]]
[[Category:Astronomical objects discovered in 1785|17850501]]
[[Category:MCG objects|+06-29-052]]
[[Category:IRAS catalogue objects|13086+3719]]