NGC 4429 explained

NGC 4429
Epoch:J2000
Type:SA0^+(r)[1]
Dist Ly:55.42 Mly
Group Cluster:Virgo Cluster
Z:0.003683/1104 km/s
Appmag V:11.02
Size V:5.6 x 2.6
Constellation Name:Virgo
Names:PGC 40850, UGC 7568, VCC 1003
Size:~82,854.8 ly (estimated)

NGC 4429 is a lenticular galaxy[2] located about 55 million light-years away[3] in the constellation of Virgo.[4] NGC 4429 is tilted at an inclination of about 75° which means that the galaxy is tilted almost edge-on as seen from Earth. NGC 4429 was discovered by astronomer William Herschel on March 15, 1784.[5] The galaxy is a member of the Virgo Cluster.[6]

Physical characteristics

NGC 4429 has a small dust disk. There is also possibly a cold circumnuclear stellar disk. The cold circumnuclear stellar disk may have formed due to the infall of gas to center caused by a merger. However, since NGC 4429 does not show any signs of a recent gravitational disturbance, the merger must have happened a long time ago in the past.[7]

The dust disk and the cold circumnuclear stellar disk are embedded in a bright, hexagonal shaped bulge that resembles that of NGC 7020. The zone has bright arcs near its major axis but no "spots" or extensions as in NGC 7020. The zone is also somewhat ring-like.[8]

Interstellar medium

NGC 4429 may lose a significant fraction of its gas due to ram pressure stripping.

Metallicity

The central regions of NGC 4429 are overabundant in the element magnesium.

See also

Notes and References

  1. Web site: NASA/IPAC Extragalactic Database . Results for NGC 4429 . 2017-09-18.
  2. Web site: Your NED Search Results. ned.ipac.caltech.edu. 2017-09-22.
  3. V. L. Afanasiev. O. K. Sil’chenko. 13 December 2001. Chemically distinct nuclei and circumnuclear rings in lenticular galaxies NGC 4429 and NGC 7013. Astronomy and Astrophysics. 385. 1–13. 2002A&A...385....1S. 10.1051/0004-6361:20020143. free.
  4. Web site: Galaxy NGC 4429 - Galaxy in Virgo Constellation · Deep Sky Objects Browser. Rojas. Sebastián García. DSO Browser. en. 2017-09-19.
  5. Web site: New General Catalog Objects: NGC 4400 - 4449. cseligman.com. en-US. 2017-09-22.
  6. Web site: The Virgo Cluster. www.atlasoftheuniverse.com. 2017-09-22.
  7. Cortes. Juan R.. Kenney. Jeffrey D. P.. Hardy. Eduardo. Integral-Field Stellar and Ionized Gas Kinematics of Peculiar Virgo Cluster Spiral Galaxies. 24 December 2014. The Astrophysical Journal Supplement Series. 216. 1 . 9. 10.1088/0067-0049/216/1/9. 1411.3387. 2015ApJS..216....9C. 53658261.
  8. Web site: NGC 4429 - (R:)SA(r)0+. The de Vaucouleurs Atlas of Galaxies. 2017-09-18.