NGC 4570 explained

NGC 4570
Epoch:J2000
Type:S0[1]
Dist Ly:17.569Mpc
Group Cluster:Virgo Cluster
H Radial V:1787 km/s
Z:0.005961
Appmag V:11.84
Size V:3.8 x 1.1
Constellation Name:Virgo
Names:CGCG 42-178, MCG 1-32-114, PGC 42096, UGC 7785, VCC 1692
Size:~21.46kpc (estimated)

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 ~100pc. In between the nuclear disk and the surrounding two stellar rings and the outer disk,[7] there is a gap that separates the outer edge of the nuclear disk and the inner edge of the main disk by about ~100pc.[8] This multi-disc structure may have been shaped through secular evolution induced by a small nuclear bar.[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.[10]

Globular Clusters

About 120 globular clusters have been detected surrounding NGC 4570.[11]

See also

Notes and References

  1. Web site: NASA/IPAC Extragalactic Database . Results for NGC 4570 . 2018-02-08.
  2. Web site: Your NED Search Results. ned.ipac.caltech.edu. 2018-02-13.
  3. Web site: Revised NGC Data for NGC 4570. spider.seds.org. 2018-02-13.
  4. Web site: New General Catalog Objects: NGC 4550 - 4599. cseligman.com. en-US. 2018-02-04.
  5. Morelli. L.. Cesetti. M.. Corsini. E. M.. Pizzella. A.. Bontà. E. Dalla. Sarzi. M.. Bertola. F.. Multiband photometric decomposition of nuclear stellar disks. Astronomy and Astrophysics. en. 518. A32. 10.1051/0004-6361/201014285. 0004-6361. 1004.2190. 2010A&A...518A..32M. 2010. 16619922.
  6. Web site: The Virgo Cluster. www.atlasoftheuniverse.com. 2018-02-04.
  7. 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. en. 298. 1. 267–274. 10.1046/j.1365-8711.1998.01616.x. free . 0035-8711. astro-ph/9804039. 1998MNRAS.298..267V. 15013074.
  8. Web site: Nuclear, Stellar Disks in E/S0 Galaxies. www.stsci.edu. 2018-02-18.
  9. 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. en. 300. 2. 469–478. 10.1046/j.1365-8711.1998.01922.x. free . 0035-8711. astro-ph/9806078. 1998MNRAS.300..469S. 18454755.
  10. 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. en. 387. 3. 1149–1156. 10.1111/j.1365-2966.2008.13297.x. free . 0035-8711. 0804.1257. 2008MNRAS.387.1149K. 16280555.
  11. Book: Finlay, Warren H.. Concise Catalog of Deep-Sky Objects: Astrophysical Information for 550 Galaxies, Clusters and Nebulae. 2014-06-04. Springer. 978-3-319-03170-5. 315.

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