Difference between revisions of "NGC 5005"

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(Created page with "{{Infobox Galaxy | name = NGC 5005 | image = File:NGC5005.jpg | constellation name = Canes Venatici<ref name=...")
 
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| names = [[Uppsala General Catalogue|UGC]] 8256,<ref name="ned" /> [[Principal Galaxies Catalogue|PGC]] 45749,<ref name="ned" /> [[Caldwell catalogue|Caldwell]]&nbsp;29
 
| names = [[Uppsala General Catalogue|UGC]] 8256,<ref name="ned" /> [[Principal Galaxies Catalogue|PGC]] 45749,<ref name="ned" /> [[Caldwell catalogue|Caldwell]]&nbsp;29
 
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'''NGC 5005''' (also known as '''Caldwell 29''') is an inclined [[spiral galaxy]] in the constellation [[Canes Venatici]].  The galaxy has a relatively bright nucleus and a bright disk that contains multiple dust lanes.<ref name="carnegieatlas" >{{cite book
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| author=A. Sandage, J. Bedke
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| year=1994
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| title=Carnegie Atlas of Galaxies
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| edition=
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| publisher=Carnegie Institution of Washington
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| location=Washington, D.C.
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| isbn=0-87279-667-1}}</ref>  The galaxy's high surface brightness makes it an object that is visible to amateur astronomers using large amateur telescopes.
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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"/>
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==Nucleus==
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NGC 5005 contains a [[low ionization nuclear emission region]] (LINER) nucleus.<ref name="hoetal1997">{{cite journal
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  | author= L. C. Ho, A. V. Filippenko, W. L. W. Sargent
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  | title=A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies
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  | journal=Astrophysical Journal Supplement
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  | year=1997
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  | volume=112
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  | issue= 2
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  | pages=315–390
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  | bibcode=1997ApJS..112..315H
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  | doi=10.1086/313041 |arxiv = astro-ph/9704107 }}</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.
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===X-ray emission===
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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
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  | author= Y. Terashima, N. Iyomoto, L. C. Ho, A. F. Ptak
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  | title=X-Ray Properties of LINERs and Low-Luminosity Seyfert Galaxies Observed with ASCA. I. Observations and Results
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  | journal=Astrophysical Journal Supplement
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  | year=2002
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  | volume=139
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  | issue= 1
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  | pages=1–36
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  | bibcode=2002ApJS..139....1T
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  | doi=10.1086/324373|arxiv = astro-ph/0203005 }}</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]].
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==Companion galaxy==
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NGC 5005 and the nearby spiral galaxy [[NGC 5033]] comprise a physical galaxy pair.<ref name="helouetal1982">{{cite journal
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  | author= G. Helou, E. E. Salpeter, Y. Terzian
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  | title= Neutral hydrogen in binary and multiple galaxies
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  | journal=Astronomical Journal
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  | year=1982
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  | volume=87
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  | pages=1443–1464
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  | bibcode=1982AJ.....87.1443H
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  | 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 tidal forces of the gravitational interaction.
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==Notes==
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{{reflist}}
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==External links==
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{{commonscat-inline}}
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*{{WikiSky}}
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{{Caldwell catalogue}}
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{{Ngc55}}
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[[Category:Spiral galaxies]]
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[[Category:Intermediate spiral galaxies]]
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[[Category:LINER galaxies]]
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[[Category:Canes Venatici (constellation)]]
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[[Category:NGC objects|5005]]
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[[Category:UGC objects|08256]]
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[[Category:PGC objects|45749]]
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[[Category:Caldwell objects|029b]]

Revision as of 21:29, 16 May 2014


NGC 5005 (also known as Caldwell 29) is an inclined spiral galaxy in the constellation Canes Venatici. The galaxy has a relatively bright nucleus and a bright disk that contains multiple dust lanes.[1] 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 megaparsecs (45 million light-years) to 34.6 megaparsecs (113 million light-years), averaging about 20 megaparsecs (65 million light-years).[2]

Nucleus

NGC 5005 contains a low ionization nuclear emission region (LINER) nucleus.[3] LINER nuclei contain weakly ionized 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 holes 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.[4] 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.[5] The two galaxies weakly influence each other gravitationally, but they are not yet close enough to each other to be distorted by the tidal forces of the gravitational interaction.

Notes

Template:Reflist

External links

Template:Commonscat-inline

Template:Caldwell catalogue

Template:Ngc55
  1. ↑ Template:Cite book
  2. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named ned
  3. ↑ Template:Cite journal
  4. ↑ Template:Cite journal
  5. ↑ Template:Cite journal
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