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  3. NGC 3261 - Wikipedia
NGC 3261 - Wikipedia
Coordinates: Sky map 10h 29m 01.4531s, −44° 39′ 24.66″
From Wikipedia, the free encyclopedia
NGC 3261
NGC 3261 imaged in infrared by 2MASS
Observation data (J2000 epoch)
ConstellationVela
Right ascension10h 29m 01.4531s[1]
Declination−44° 39′ 24.66″[1]
Redshift0.008549 ± 0.000017 [1]
Heliocentric radial velocity2,563 ± 5 km/s[1]
Distance108 ± 7.5 Mly (33.2 ± 2.3 Mpc)[1]
Group or clusterNGC 3261 Group (LGG 198)
Apparent magnitude (V)11.2[2]
Characteristics
TypeSB(rs)bc [1]
Apparent size (V)3.7′ × 2.8′[1]
Other designations
ESO 263- G 040, AM 1026-442, IRAS 10268-4423, MCG -07-22-015, PGC 30868[1]

NGC 3261 is a barred spiral galaxy in the constellation Vela. The galaxy lies about 110 million light years away from Earth based on redshift, which means, given its apparent dimensions, that NGC 3261 is approximately 130,000 light years across.[1] It was discovered by John Herschel on March 15, 1836.[3]

NGC 3261 has a low surface brightness bar with a bright nucleus. At the end of the bar there is a nearly complete inner pseudoring formed by the spiral arm. From the ring emanate two diffuse spiral arms that can be traced for more than half a revolution. The east arm is better defined than the west arm but at around two thirds of its length becomes diffuse.[4] The spiral pattern is between a grand design galaxy and a multiple arms pattern, with at least ten spiral fragments visible.[5]

NGC 3261 is the main member of the NGC 3261 Group (also known as LGG 198), which according to Garcia, also includes NGC 3256 and NGC 3256C.[6] Four companion galaxies are visible south of NGC 3261, the two of them lying close to it.[7] NGC 3261 lies about 9 degrees south of the Antlia Cluster, which lies at a similar redshift.[5]

Supernovae

Two supernovae have been observed in NGC 3261.

  • SN 1997Z was discovered on 10 February 1997 by R. Martin, A. Williams, and S. Woodings, Perth Observatory, at an apparent magnitude of 15.5.[8] It was identified as a type II supernova several months post maximum.[9]
  • SN 2008fw was discovered on 19 September 2008 by L. A. G. Monard (bio-it) at an apparent magnitude of 14.3, lying 52" west and 30" south of the galaxy center.[10] The spectral analysis showed it was a type Ia supernova near maximum light.[11]

See also

References

  1. ^ a b c d e f g h i "Results for object NGC 3261". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 14 February 2025.
  2. ^ "Revised NGC Data for NGC 3261". spider.seds.org. Retrieved 30 March 2024.
  3. ^ Seligman, Courtney. "NGC 3261 (= PGC 30868)". Celestial Atlas. Retrieved 19 November 2018.
  4. ^ Eskridge, Paul B.; Frogel, Jay A.; Pogge, Richard W.; Quillen, Alice C.; Berlind, Andreas A.; Davies, Roger L.; DePoy, D. L.; Gilbert, Karoline M.; Houdashelt, Mark L.; Kuchinski, Leslie E.; Ramirez, Solange V.; Sellgren, K.; Stutz, Amelia; Terndrup, Donald M.; Tiede, Glenn P. (November 2002). "Near-Infrared and Optical Morphology of Spiral Galaxies". The Astrophysical Journal Supplement Series. 143 (1): 73–111. arXiv:astro-ph/0206320. Bibcode:2002ApJS..143...73E. doi:10.1086/342340.
  5. ^ a b Sandage, A., Bedke, J. (1994), The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington
  6. ^ Garcia, A. M. (1 July 1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47–90. Bibcode:1993A&AS..100...47G. ISSN 0365-0138.
  7. ^ Corwin, H. G.; de Vaucouleurs, A.; de Vaucouleurs, G (1985) Southern Galaxy Catalogue. University of Texas
  8. ^ "SN 1997Z". Transient Name Server. IAU. Retrieved 14 February 2025.
  9. ^ Martin, R.; Williams, A.; Woodings, S.; Benetti, S.; Turatto, M.; Cappellaro, E. (1997). "Supernova 1997Z in NGC 3261". International Astronomical Union Circular (6558): 1. Bibcode:1997IAUC.6558....1M.
  10. ^ "SN 2008fw". Transient Name Server. IAU. Retrieved 14 February 2025.
  11. ^ Morrell, N. (2008). "Supernova 2008fw in NGC 3261". Central Bureau Electronic Telegrams (1521): 2. Bibcode:2008CBET.1521....2M.
Wikimedia Commons has media related to NGC 3261.
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