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| NGC 3384 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Leo[2] |
| Right ascension | 10h 48m 16.9s[3] |
| Declination | +12° 37′ 46″[3] |
| Redshift | 704 ± 2 km/s[3] |
| Distance | 35.1 ± 2.3 Mly (10.8 ± 0.7 Mpc)[4] |
| Apparent magnitude (V) | 10.9[3] |
| Characteristics | |
| Type | E7[3] |
| Apparent size (V) | 5′.5 × 2′.5[3] |
| Other designations | |
| NGC 3371,[3] UGC 5911,[3] PGC 32292[3] | |
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NGC 3384 is an elliptical galaxy in the constellation Leo. The galaxy was discovered by William Herschel in 1784 as part of the Herschel 400 Catalogue. The high age of the stars in the central region of NGC 3384 was confirmed after analysis of their color. More than 80% were found to be Population II stars which are over a billion years old.[5] The supermassive black hole at the core has a mass of 1.6+0.1
−0.2×107 M☉.[6]
- ^ "Settling into old age". spacetelescope.org. Retrieved 13 May 2019.
- ^ R. W. Sinnott, ed. (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. ISBN 978-0-933346-51-2.
- ^ a b c d e f g h i "NASA/IPAC Extragalactic Database". Results for NGC 3384. Retrieved 2006-10-12.
- ^ Jensen, Joseph B.; Tonry, John L.; Barris, Brian J.; Thompson, Rodger I.; et al. (February 2003). "Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations". Astrophysical Journal. 583 (2): 712–726. arXiv:astro-ph/0210129. Bibcode:2003ApJ...583..712J. doi:10.1086/345430. S2CID 551714.
- ^ Attia, Abdel-Fattah; Ismail, H. A.; Selim, I. M.; Osman, A. M.; et al. (August 2005). "Stellar Population Analysis of Galaxies based on Genetic Algorithms". Chinese Journal of Astronomy and Astrophysics. 5 (4): 347–355. Bibcode:2005ChJAA...5..347A. doi:10.1088/1009-9271/5/4/002.
- ^ Graham, Alister W. (November 2008), "Populating the Galaxy Velocity Dispersion – Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values", Publications of the Astronomical Society of Australia, 25 (4): 167–175, arXiv:0807.2549, Bibcode:2008PASA...25..167G, doi:10.1071/AS08013, S2CID 89905.