NGC 4429

NGC 4429 is a lenticular galaxy[3] located about 55 million light-years away[2] 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.[2] NGC 4429 was discovered by astronomer William Herschel on March 15, 1784.[5] The galaxy is a member of the Virgo Cluster.[2][6]

NGC 4429
SDSS image of NGC 4429.
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension 12h 27m 26.5s[1]
Declination11° 06′ 28″[1]
Redshift0.003683/1104 km/s[1]
Distance55.42 Mly[2]
Group or clusterVirgo Cluster
Apparent magnitude (V)11.02[1]
Characteristics
TypeSA0^+(r)[1]
Size~82,854.8 ly (estimated)[2]
Apparent size (V)5.6 x 2.6[1]
Other designations
PGC 40850, UGC 7568, VCC 1003[1]

Physical characteristics

NGC 4429 has a small dust disk.[7] 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.[8]

The dust disk[7] and the cold circumnuclear stellar disk[8] 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.[7]

Interstellar medium

NGC 4429 may lose a significant fraction of its gas due to ram pressure stripping.[2]

Metallicity

The central regions of NGC 4429 are overabundant in the element magnesium.[2]

HST image of NGC 4429 showing its compact nuclear ring.
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See also

References
  1. "NASA/IPAC Extragalactic Database". Results for NGC 4429. Retrieved 2017-09-18.
  2. V. L. Afanasiev, O. K. Sil’chenko (13 December 2001). "Chemically distinct nuclei and circumnuclear rings in lenticular galaxies NGC 4429 and NGC 7013" (PDF). Astronomy and Astrophysics. 385: 1–13. Bibcode:2002A&A...385....1S. doi:10.1051/0004-6361:20020143.
  3. "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-09-22.
  4. Rojas, Sebastián García. "Galaxy NGC 4429 - Galaxy in Virgo Constellation · Deep Sky Objects Browser". DSO Browser. Retrieved 2017-09-19.
  5. "New General Catalog Objects: NGC 4400 - 4449". cseligman.com. Retrieved 2017-09-22.
  6. "The Virgo Cluster". www.atlasoftheuniverse.com. Retrieved 2017-09-22.
  7. "NGC 4429 - (R:)SA(r)0+". The de Vaucouleurs Atlas of Galaxies. Retrieved 2017-09-18.
  8. Cortes, Juan R.; Kenney, Jeffrey D. P.; Hardy, Eduardo (24 December 2014). "INTEGRAL-FIELD STELLAR AND IONIZED GAS KINEMATICS OF PECULIAR VIRGO CLUSTER SPIRAL GALAXIES". The Astrophysical Journal Supplement Series. 216: 9. arXiv:1411.3387. Bibcode:2015ApJS..216....9C. doi:10.1088/0067-0049/216/1/9.


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