Astronomy:NGC 4504

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NGC 4504
NGC 4504 imaged by Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension 12h 32m 17.4095s[1]
Declination−07° 33′ 48.897″[1]
Redshift0.003329 ± 0.000002 [1]
Helio radial velocity998 ± 1 km/s[1]
Distance55.6 ± 16.9 Mly (17.1 ± 5.2 Mpc)[1]
Group or clusterVirgo II Groups
Apparent magnitude (V)13.2[2]
Characteristics
TypeSA(s)cd [1]
Size~71,000 ly (21.7 kpc) (estimated)[1]
Apparent size (V)4.4′ × 2.7′ [1]
Other designations
IRAS 12296-0717, MCG-01-32-022, PGC 41555[1]

NGC 4504 is a spiral galaxy in the constellation Virgo. The galaxy lies about 55 million light years away from Earth, which means, given its apparent dimensions, that NGC 4504 is approximately 70,000 light years across.[1] It was discovered by William Herschel on March 20, 1789.[3]

NGC 4504 has a point source nucleus embedded in a highly elliptical bulge. It is possible there is a small bar in the bulge. The galaxy has very low surface brightness arms emerging from the bulge.[4] HII regions are visible in the disk, the largest of which are more than 3 arcseconds across.[5] The star formation rate is estimated to be 0.45 M☉ per year based on the H-alpha emission.[6] The galaxy has a small bar 0.36 arcminutes long and a ring with a diameter 0.93 arcminutes.[7] In the nucleus of the galaxy lies a nuclear star cluster which has a radius of 4 arcseconds.[8]

NGC 4504 forms a pair with NGC 4487, which lies 35 arcminutes away.[5] NGC 4504 is a member of the Messier 104 Group, which also includes the Sombrero Galaxy (M104), NGC 4487, UGCA 287, and UGCA 289.[9] A. M. Garcia considers the galaxy part of the LGG 293 Group, in which are included the galaxies NGC 4487, NGC 4504, and NGC 4597.[10] It is part of a Virgo II Groups, a chain of groups extending from the Virgo Cluster.[11]

  • NGC 4504 by Legacy Surveys
    NGC 4504 by Legacy Surveys

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 "Results for object NGC 4504". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+4504. 
  2. ↑ "Revised NGC Data for NGC 4504". https://spider.seds.org/ngc/revngcic.cgi?NGC4504. 
  3. ↑ Seligman, Courtney. "NGC 4504 (= PGC 41555)". https://cseligman.com/text/atlas/ngc45.htm#4504. 
  4. ↑ Eskridge, Paul B.; Frogel, Jay A.; Pogge, Richard W.; Quillen, Alice C.; Berlind, Andreas A.; Davies, Roger L.; DePoy, D. L.; Gilbert, Karoline M. et al. (November 2002). "Near-Infrared and Optical Morphology of Spiral Galaxies". The Astrophysical Journal Supplement Series 143 (1): 73–111. doi:10.1086/342340. Bibcode: 2002ApJS..143...73E. 
  5. ↑ 5.0 5.1 Sandage, A., Bedke, J. (1994), The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington
  6. ↑ Sánchez-Gallego, J. R.; Knapen, J. H.; Wilson, C. D.; Barmby, P.; Azimlu, M.; Courteau, S. (1 June 2012). "The JCMT Nearby Galaxies Legacy Survey - VII. H imaging and massive star formation properties: The JCMT Nearby Galaxies Legacy Survey - VII.". Monthly Notices of the Royal Astronomical Society 422 (4): 3208–3248. doi:10.1111/j.1365-2966.2012.20845.x. 
  7. ↑ Comerón, S.; Salo, H.; Laurikainen, E.; Knapen, J. H.; Buta, R. J.; Herrera-Endoqui, M.; Laine, J.; Holwerda, B. W. et al. (February 2014). "ARRAKIS: atlas of resonance rings as known in the S 4 G". Astronomy & Astrophysics 562: A121. doi:10.1051/0004-6361/201321633. Bibcode: 2014A&A...562A.121C. https://www.aanda.org/articles/aa/pdf/2014/02/aa21633-13.pdf. 
  8. ↑ Georgiev, Iskren Y.; Böker, Torsten (11 July 2014). "Nuclear star clusters in 228 spiral galaxies in the HST/WFPC2 archive: catalogue and comparison to other stellar systems". Monthly Notices of the Royal Astronomical Society 441 (4): 3570–3590. doi:10.1093/mnras/stu797. 
  9. ↑ Makarov, Dmitry; Karachentsev, Igor (21 April 2011). "Galaxy groups and clouds in the local (z~ 0.01) Universe". Monthly Notices of the Royal Astronomical Society 412 (4): 2498–2520. doi:10.1111/j.1365-2966.2010.18071.x. Bibcode: 2011MNRAS.412.2498M. http://www.sao.ru/hq/dim/groups/galaxies.dat. Retrieved 1 February 2025. 
  10. ↑ Garcia, A. M. (1 July 1993). "General study of group membership. II. Determination of nearby groups.". Astronomy and Astrophysics Supplement Series 100: 47–90. ISSN 0365-0138. Bibcode: 1993A&AS..100...47G. https://cdsarc.cds.unistra.fr/ftp/J/A+AS/100/47/table2.dat. 
  11. ↑ "The Virgo II Groups". http://www.atlasoftheuniverse.com/galgrps/virii.html. 

Template:NGC objects: 4001-5000



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