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NGC 4570

NGC 4570
SDSS image of NGC 4570.
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension12h 36m 53.4s[1]
Declination07° 14′ 48″[1]
Redshift0.005961[1]
Heliocentric radial velocity1787 km/s[1]
Distance57.30 Mly (17.569 Mpc)[1]
Group or clusterVirgo Cluster
Apparent magnitude (V)11.84[1]
Characteristics
TypeS0[1]
Size~70,000 ly (21.46 kpc) (estimated)[1]
Apparent size (V)3.8 x 1.1[1]
Other designations
CGCG 42-178, MCG 1-32-114, PGC 42096, UGC 7785, VCC 1692[1]

NGC 4570 is an edge-on lenticular galaxy located about 57 million light-years away[2] in the constellation Virgo.[3] NGC 4570 was discovered by astronomer William Herschel on April 13, 1784[4] and is a member of the Virgo Cluster.[5][6]

Structure

NGC 4570 has a nuclear disc that extends to a radius of about ~330 ly (100 pc). In between[7] the nuclear disk and the surrounding two stellar rings and the outer disk,[8][9] there is a gap that separates the outer edge of the nuclear disk and the inner edge of the main disk by about ~330 ly (100 pc).[7] This multi-disc structure may have been shaped through secular evolution induced by a small nuclear bar.[10][9] However, observations of the globular clusters surrounding NGC 4570 have found a significant population with ages ranging from about 1–3 billion years. Surprisingly, the estimated ages of the young globular clusters appears to be in good agreement with the estimated age of the stellar population of the nuclear disc (≤2 Gyr). This suggests that the young globular clusters and the nuclear disc instead formed from a merger or accretion event which involved significant amounts of gas and triggered a strong starburst in the galaxy.[11]

Globular Clusters

About 120 globular clusters have been detected surrounding NGC 4570.[8]

See also

References

  1. ^ a b c d e f g h i j "NASA/IPAC Extragalactic Database". Results for NGC 4570. Retrieved 2018-02-08.
  2. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2018-02-13.
  3. ^ "Revised NGC Data for NGC 4570". spider.seds.org. Retrieved 2018-02-13.
  4. ^ "New General Catalog Objects: NGC 4550 - 4599". cseligman.com. Retrieved 2018-02-04.
  5. ^ Morelli, L.; Cesetti, M.; Corsini, E. M.; Pizzella, A.; Bontà, E. Dalla; Sarzi, M.; Bertola, F. (2010). "Multiband photometric decomposition of nuclear stellar disks". Astronomy and Astrophysics. 518: A32. arXiv:1004.2190. Bibcode:2010A&A...518A..32M. doi:10.1051/0004-6361/201014285. ISSN 0004-6361. S2CID 16619922.
  6. ^ "The Virgo Cluster". www.atlasoftheuniverse.com. Retrieved 2018-02-04.
  7. ^ a b "Nuclear, Stellar Disks in E/S0 Galaxies". www.stsci.edu. Retrieved 2018-02-18.
  8. ^ a b Finlay, Warren H. (2014-06-04). Concise Catalog of Deep-Sky Objects: Astrophysical Information for 550 Galaxies, Clusters and Nebulae. Springer. p. 315. ISBN 978-3-319-03170-5.
  9. ^ a b Bosch, Van Den; C, Frank; Emsellem, Eric (1998-07-21). "Bar-driven evolution of S0s: the edge-on galaxy NGC 4570". Monthly Notices of the Royal Astronomical Society. 298 (1): 267–274. arXiv:astro-ph/9804039. Bibcode:1998MNRAS.298..267V. doi:10.1046/j.1365-8711.1998.01616.x. ISSN 0035-8711. S2CID 15013074.
  10. ^ Scorza, Cecilia; Bosch, Van Den; C, Frank (1998-10-21). "Nuclear stellar discs in early-type galaxies — II. Photometric properties". Monthly Notices of the Royal Astronomical Society. 300 (2): 469–478. arXiv:astro-ph/9806078. Bibcode:1998MNRAS.300..469S. doi:10.1046/j.1365-8711.1998.01922.x. ISSN 0035-8711. S2CID 18454755.
  11. ^ Kotulla, R.; Fritze, U.; Anders, P. (2008-07-01). "Young globular clusters in an old S0: clues to the formation history of NGC 4570". Monthly Notices of the Royal Astronomical Society. 387 (3): 1149–1156. arXiv:0804.1257. Bibcode:2008MNRAS.387.1149K. doi:10.1111/j.1365-2966.2008.13297.x. ISSN 0035-8711. S2CID 16280555.


Quelle: https://en.wikipedia.org/wiki/NGC_4570