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NGC 3258

Coordinates: Sky map 10h 28m 53.588s, −35° 36′ 19.98″
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NGC 3258
NGC 3258
NGC 3258 (center) imaged by the Víctor M. Blanco Telescope
Observation data (J2000 epoch)
ConstellationAntlia
Right ascension10h 28m 53.588s[1]
Declination−35° 36′ 19.98″[1]
Redshift0.009357[2]
Heliocentric radial velocity2,792±28 km/s[2]
Distance124.3 Mly (38.11 Mpc)[3]
Group or clusterAntlia Cluster[4]
Apparent magnitude (V)11.72[2]
Apparent magnitude (B)12.50[2]
Characteristics
TypeE1[2]
Size~193,900 ly (59.45 kpc) (estimated)[5]
Apparent size (V)2.9′ × 2.5′[5]
Other designations
ESO 375- G 037, NGC 3258, LEDA 30859, MCG -06-23-032, PGC 30859[2]

NGC 3258 is a giant elliptical galaxy[6] in the southern constellation of Antlia.[7] It was discovered by British astronomer John Herschel on May 2, 1834.[8] NGC 3258 is one of the two brightest members of the Antlia Cluster,[9] which lies about 40.7 megaparsecs (132.7 million light-years) away from the Milky Way.[4] It is the namesake of the sparse NGC 3258 group of galaxies that includes the elliptical galaxy NGC 3260 and barred spiral NGC 3257.[10]

The morphological classification of NGC 3258 is E1, which indicates it displays a mild ellipticity. It is a weak, extended radio source. Photometry shows a disk of dust around the center of the galaxy, which is aligned with the major axis. There is a heated component of this disk with a mass of 48 M☉ within a radius of 5.5 kpc, which may indicate star formation. Based on a lack of X-ray emission, there is no indication of activity at the center.[9][11]

ALMA observations of the cold gas disk near the supermassive black hole at the core provide a mass estimate of 2.249×109 M☉ with an uncertainty of 0.18%.[12] Spectroscopic observations of star motions near the core yield an independent mass estimate of (2.2±0.2)×109 M☉,[13] which is a good match to the ALMA estimate.

NGC 3258 has an extensive population of globular clusters that is estimated at 6000±150.[6][14] A population of 23 ultra-compact dwarfs have been identified in the vicinity of NGC 3258, some of which may be former dwarf galaxies that have been captured and stripped during minor merger events.[15] These objects provide a mass estimate of 2.7×1012 M☉ within a radius of around 47 kpc from the galactic center.[16]

One supernova has been observed in NGC 3258. The type Ia supernova SN 2010hx was discovered by Berto Monard [fr] on September 16, 2010 at a magnitude of 15.3.[17][18]

References

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  1. 1 2 Skrutskie, Michael F.; et al. (February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331.
  2. 1 2 3 4 5 6 "NGC 3258". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-19.
  3. ↑ Crook, Aidan C.; et al. (2007). "Groups of Galaxies in the Two Micron All Sky Redshift Survey". The Astrophysical Journal. 655 (2): 790–813. arXiv:astro-ph/0610732. Bibcode:2007ApJ...655..790C. doi:10.1086/510201. S2CID 11672751.
  4. 1 2 Dirsch, B.; et al. (September 2003). "The globular cluster systems of NGC 3258 and NGC 3268 in the Antlia cluster". Astronomy and Astrophysics. 408 (3): 929–939. arXiv:astro-ph/0307200. Bibcode:2003A&A...408..929D. doi:10.1051/0004-6361:20031027. S2CID 763415.
  5. 1 2 "Results for object NGC 3258". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 21 June 2025.
  6. 1 2 Bassino, Lilia P.; et al. (May 2008). "VLT photometry in the Antlia cluster: the giant ellipticals NGC3258 and NGC3268 and their globular cluster systems". Monthly Notices of the Royal Astronomical Society. 386 (2): 1145–1156. arXiv:0802.2354. Bibcode:2008MNRAS.386.1145B. doi:10.1111/j.1365-2966.2008.13115.x.
  7. ↑ Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 978-0-00-717223-8.
  8. ↑ Seligman, Courtney. "New General Catalogue objects: NGC 3250 - 3299". cseligman.com. Retrieved 2021-02-19.
  9. 1 2 De Bruyne, V.; et al. (April 2004). "Modelling galactic spectra - I. A dynamical model for NGC 3258". Monthly Notices of the Royal Astronomical Society. 349 (2): 440–460. arXiv:astro-ph/0312156. Bibcode:2004MNRAS.349..440D. doi:10.1111/j.1365-2966.2004.07495.x.
  10. ↑ Pedersen, Kristian; et al. (August 1997). "A New Measurement of the Baryonic Fraction Using the Sparse NGC 3258 Group of Galaxies". The Astrophysical Journal. 485 (1): L17–L20. arXiv:astro-ph/9705217. Bibcode:1997ApJ...485L..17P. doi:10.1086/310802.
  11. ↑ De Bruyne, V.; et al. (April 2004). "Modelling galactic spectra - II. Simultaneous study of stellar dynamics and stellar mix in NGC 3258". Monthly Notices of the Royal Astronomical Society. 349 (2): 461–475. arXiv:astro-ph/0312150. Bibcode:2004MNRAS.349..461D. doi:10.1111/j.1365-2966.2004.07496.x.
  12. ↑ Boizelle, Benjamin D.; et al. (August 2019). "A Precision Measurement of the Mass of the Black Hole in NGC 3258 from High-resolution ALMA Observations of Its Circumnuclear Disk". The Astrophysical Journal. 881 (1). id. 10. arXiv:1906.06267. Bibcode:2019ApJ...881...10B. doi:10.3847/1538-4357/ab2a0a.
  13. ↑ Waters, Thomas K.; et al. (August 2024). "A Stellar Dynamical Mass Measurement of the Supermassive Black Hole in NGC 3258". The Astrophysical Journal. 971 (2). id. 149. arXiv:2406.14623. Bibcode:2024ApJ...971..149W. doi:10.3847/1538-4357/ad5a91.
  14. ↑ Caso, Juan Pablo; et al. (September 2017). "Globular cluster systems as tracers of the evolutionary history in NGC 3258 and NGC 3268". Monthly Notices of the Royal Astronomical Society. 470 (3): 3227–3238. arXiv:1812.09364. Bibcode:2017MNRAS.470.3227C. doi:10.1093/mnras/stx1393.
  15. ↑ Caso, Juan Pablo; et al. (April 2013). "Ultracompact dwarfs around NGC 3258 in the Antlia cluster". Monthly Notices of the Royal Astronomical Society. 430 (2): 1088–1101. arXiv:1305.1896. Bibcode:2013MNRAS.430.1088C. doi:10.1093/mnras/sts687.
  16. ↑ Caso, Juan Pablo; et al. (July 2014). "Ultracompact dwarfs around NGC 3268". Monthly Notices of the Royal Astronomical Society. 442 (1): 891–899. arXiv:1406.1776. Bibcode:2014MNRAS.442..891C. doi:10.1093/mnras/stu876.
  17. ↑ Monard, L. A. G. (2010). "Supernova 2010hx in NGC 3258". Central Bureau Electronic Telegrams (2460): 1. Bibcode:2010CBET.2460....1M. Retrieved 2026-08-08.
  18. ↑ "SN 2010hx". Transient Name Server. IAU. Retrieved 2 January 2025.
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