Astronomy:NGC 4318

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Short description: Galaxy in the constellation Virgo
NGC 4318
SDSS NGC 4318.jpeg
SDSS image of NGC 4318.
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension 12h 22m 43.3s[1]
Declination08° 11′ 54″[1]
Redshift0.004106[1]
Helio radial velocity1231 km/s[1]
Distance72 Mly (22 Mpc)[1]
Group or clusterVirgo W′ group[2]
Apparent magnitude (V)13.8[1]
Characteristics
TypeS0[3]
Mass7.2×1009[4] M☉
Size~22,000 ly (6.7 kpc) (estimated)[1]
Apparent size (V)0.84 x 0.69[1]
Other designations
UGC 07446, VCC 0575, PGC 040122, MCG +02-32-015[1]

NGC 4318 is a small lenticular galaxy[3] located about 72 million light-years away[5] in the constellation Virgo. It was discovered by astronomer John Herschel on January 18, 1828.[6] NGC 4318 is a member of the Virgo W′ group,[2][7][8][9] a group of galaxies in the background of the Virgo Cluster[2] that is centered on the giant elliptical galaxy NGC 4365.[9]

Physical characteristics

NGC 4318 contains a small,[3] classical bulge[10] and a nuclear stellar disc with a diameter of ~230 ly (70 pc).[11] Outside the nuclear stellar disc lies a sharply bounded, low surface brightness region with a diameter of ~1,800 ly (560 pc) beyond which lies a larger outer disk.[3][12]

Black Hole

NGC 4318 harbors a supermassive black hole with an estimated mass of 4 million (5×106 M☉) solar masses.[13][14][15]

Globular clusters

NGC 4318 is surrounded by 18 globular clusters.[16][17]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "NASA/IPAC Extragalactic Database". Results for NGC 4318. http://nedwww.ipac.caltech.edu/. 
  2. ↑ 2.0 2.1 2.2 Merritt, David; Anthony, Andre; Peng, Eric; Jordan, Andres; Ferrarese, Laura; West, Michael; Tonry, John; Cote, Patrick et al. (2007-02-20). "The ACS Virgo Cluster Survey. XIII. SBF Distance Catalog and the Three-Dimensional Structure of the Virgo Cluster" (in en). The Astrophysical Journal 655 (1): 144–162. doi:10.1086/509598. Bibcode: 2007ApJ...655..144M. 
  3. ↑ 3.0 3.1 3.2 3.3 Bender, Ralf; Cornell, Mark E.; Fisher, David B.; Kormendy, John (2009). "Structure and Formation of Elliptical and Spheroidal Galaxies" (in en). The Astrophysical Journal Supplement Series 182 (1): 216–309. doi:10.1088/0067-0049/182/1/216. Bibcode: 2009ApJS..182..216K. 
  4. ↑ Couch, Warrick J.; Forbes, Duncan A.; Hau, George K. T.; Spolaor, Max (2010-07-05). "Early-type galaxies at large galactocentric radii - I. Stellar kinematics and photometric properties" (in en). Monthly Notices of the Royal Astronomical Society 408 (1): 254–271. doi:10.1111/j.1365-2966.2010.17282.x. Bibcode: 2010MNRAS.408..254S. 
  5. ↑ "Your NED Search Results". https://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC%204318&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES. 
  6. ↑ "New General Catalog Objects: NGC 4300 - 4349". https://cseligman.com/text/atlas/ngc43.htm#4318. 
  7. ↑ West, Michael J.; Tonry, John L.; Peng, Eric W.; Infante, Leopoldo; Ferrarese, Laura; Cote, Patrick; Mei, Simona; Jordan, Andres et al. (2009-01-08). "The ACS Fornax Cluster Survey. V. Measurement and Recalibration of Surface Brightness Fluctuations and a Precise Value of the Fornax--Virgo Relative Distance" (in en). The Astrophysical Journal 694 (1): 556–572. doi:10.1088/0004-637X/694/1/556. Bibcode: 2009ApJ...694..556B. 
  8. ↑ West, Michael J.; Tonry, John L.; Infante, Leopoldo; Mei, Simona; Kissler-Patig, Markus; Ferrarese, Laura; Cote, Patrick; Blakeslee, John P. et al. (2010-04-16). "The ACS Fornax Cluster Survey. VIII. The Luminosity Function of Globular Clusters in Virgo and Fornax Early-Type Galaxies and its Use as a Distance Indicator" (in en). The Astrophysical Journal 717 (2): 603–616. doi:10.1088/0004-637X/717/2/603. Bibcode: 2010ApJ...717..603V. 
  9. ↑ 9.0 9.1 Schindler, Sabine; Vikhlinin, Alexey; Nulsen, Paul E. J.; Li, Zhiyuan; Churazov, Eugene; Zhuravleva, Irina; Zhang, Zhongli; Randall, Scott W. et al. (2012-03-07). "Chandra observations of NGC4342, an optically faint, X-ray gas-rich early-type galaxy" (in en). The Astrophysical Journal 755 (1): 25. doi:10.1088/0004-637X/755/1/25. Bibcode: 2012ApJ...755...25B. 
  10. ↑ Romanowsky, Aaron J.; Fall, S. Michael (2018-08-07). "Angular Momentum and Galaxy Formation Revisited: Scaling Relations for Disks and Bulges" (in en). The Astrophysical Journal 868 (2): 133. doi:10.3847/1538-4357/aaeb27. Bibcode: 2018ApJ...868..133F. 
  11. ↑ Ledo, H. R.; Sarzi, M.; Dotti, M.; Khochfar, S.; Morelli, L. (2010-09-01). "A census of nuclear stellar discs in early-type galaxies". Monthly Notices of the Royal Astronomical Society 407 (2): 969–985. doi:10.1111/j.1365-2966.2010.16990.x. ISSN 0035-8711. Bibcode: 2010MNRAS.407..969L. 
  12. ↑ West, Michael J.; Tonry, John L.; Milosavljevic, Milos; Merritt, David; Mei, Simona; Piatek, Slawomir; Blakeslee, John P.; Peng, Eric W. et al. (2006-02-14). "The ACS Virgo Cluster Survey. VI. Isophotal Analysis and the Structure of Early-Type Galaxies" (in en). The Astrophysical Journal Supplement Series 164 (2): 334–434. doi:10.1086/501350. Bibcode: 2006ApJS..164..334F. 
  13. ↑ Gallo, Elena; Treu, Tommaso; Marshall, Philip J.; Woo, Jong-Hak; Leipski, Christian; Antonucci, Robert (2010-05-01). "AMUSE-Virgo. II. Down-sizing in Black Hole Accretion". The Astrophysical Journal 714 (1): 25–36. doi:10.1088/0004-637X/714/1/25. ISSN 0004-637X. Bibcode: 2010ApJ...714...25G. 
  14. ↑ Antonucci, Robert; Miller, Brendan P.; Woo, Jong-Hak; Treu, Tommaso; Gallo, Elena; Leipski, Christian (2011-11-29). "AMUSE-VIRGO. III: mid-infrared photometry of early-type galaxies and limits on obscured nuclear emission" (in en). The Astrophysical Journal 744 (2): 152. doi:10.1088/0004-637X/744/2/152. 
  15. ↑ "VizieR". http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-ref=VIZ5d6b390357a3&-out.add=.&-source=J/ApJ/835/223/xgal&recno=428. 
  16. ↑ Alessi, Matthew; Harris, Gretchen L. H.; Harris, William E. (2013-06-10). "A Catalog of Globular Cluster Systems: What Determines the Size of a Galaxy's Globular Cluster Population?" (in en). The Astrophysical Journal 772 (2): 82. doi:10.1088/0004-637X/772/2/82. Bibcode: 2013ApJ...772...82H. 
  17. ↑ West, Andrew A.; Tonry, John L.; Mei, Simona; Ferrarese, Laura; Chen, Chin-Wei; Blakeslee, John P.; West, Michael J.; Takamiya, Marianne et al. (2008-03-04). "The ACS Virgo Cluster Survey XV. The Formation Efficiencies of Globular Clusters in Early-Type Galaxies: The Effects of Mass and Environment" (in en). The Astrophysical Journal 681 (1): 197. doi:10.1086/587951. Bibcode: 2008ApJ...681..197P. 

External links



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