NGC 4608

NGC 4608 is a barred lenticular galaxy located about 56 million light-years away[2] in the constellation of Virgo. The galaxy was discovered by astronomer William Herschel on March 15, 1784.[3] It is a member of the Virgo Cluster.[4]

NGC 4608
SDSS image of NGC 4608.
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension 12h 41m 13.3s[1]
Declination10° 09′ 20″[1]
Redshift0.006171/1850 km/s[1]
Distance56,390,194 ly
Group or clusterVirgo Cluster
Apparent magnitude (V)11.97[1]
Characteristics
TypeSB0^0(r) [1]
Size~53,105.36 ly (estimated)
Apparent size (V)3.2 x 2.7[1]
Other designations
UGC 7842, PGC 42545, VCC 1869,[1]

Physical characteristics

NGC 4608 has a very well-defined bar. Surrounding the bar, there is an inner ring that is defined by a sharp inner edge. Outside of the inner ring,[5] there is a low surface brightness disk[6] that contains weak spiral features.[5]

The disk in NGC 4608 is practically considered non-existent. One explanation is that the bar in the galaxy was able to form without a disk. Another explanation says that a weak bar forms initially. Over time, the bar grows by causing the external disk to lose angular momentum therefore funneling material toward the bulge. Then the bar would be surrounded by a halo with very little or no disk left.[6]

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See also

References
  1. "NASA/IPAC Extragalactic Database". Results for NGC 4608. Retrieved 2017-09-04.
  2. "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-09-04.
  3. "New General Catalog Objects: NGC 4600 - 4649". cseligman.com. Retrieved 2017-09-03.
  4. "Detailed Object Classifications". ned.ipac.caltech.edu. Retrieved 2017-09-04.
  5. "NGC 4608 - SB(r)0/a". The de Vaucouleurs Atlas of Galaxies. Retrieved 2017-09-04.
  6. Gadotti, D. A.; de Souza, R. E. (8 January 2003). "NGC 4608 AND NGC 5701: BARRED GALAXIES WITHOUT DISKS?". The Astrophysical Journal. 583 (2): L75–L78. arXiv:astro-ph/0301072. Bibcode:2003ApJ...583L..75G. doi:10.1086/368159.


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