NGC 1311

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NGC 1311
NGC1311 - hst 10210R814GB606.png
NGC 1311
Observation data (J2000 epoch)
Constellation Horologium
Right ascension 03h 20m 06.9s [1]
Declination −52° 11′ 08″ [1]
Redshift 0.001911 ± 0.000007 [1]
Heliocentric radial velocity 573 ± 2 km/s [1]
Distance 4.932 ± 1.003 Mpc [1]
Apparent magnitude  (V)13.0 [1]
Apparent magnitude  (B)13.4 [1]
Characteristics
Type SBm [1]
Apparent size  (V)3.0′ × 0.8′ [1]
Other designations
ESO 200-7, IRAS 03186-5222 [1]

NGC 1311 is a nearby late-type barred spiral galaxy, occasionally described as a dwarf irregular or emission-line galaxy, and a potential weak Seyfert 2 active galaxy candidate located in the Horologium constellation. It was discovered by John Herschel in 1837. [2] [3] [4] [5] [6] [7] [8] [9]

Contents

IC 1954 Group

NGC 1311 is a part of the IC 1954 galaxy group, a small assembly of nearby galaxies in Horologium and surrounding regions. The group includes:

Structure and Star Formation

NGC 1311’s structure is characteristic of a Magellanic barred spiral, with a weak bar and loosely wound spiral arms. Its star formation occurs in bursts, with 13 identified candidate star clusters showing ages clustered around 10 Myr, 100 Myr, and >1 Gyr. The galaxy’s isolation and low mass contribute to its distinct star-forming behavior, following the luminosity-metallicity relation typical of late-type dwarf galaxies. [11]

The Hubble Space Telescope revealed a population of star clusters with masses ranging from ~10³ to ~105 solar masses, with more massive clusters generally being older. Star formation is concentrated in two regions, each ~200 parsecs in size, at the east and west ends of a central bar-like structure. These regions host hot main-sequence stars and blue supergiants, with roughly half of the young stellar population located there. [12]

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 "NASA/IPAC Extragalactic Database". results for object PGC 012460*. Retrieved 2025-04-26.
  2. ↑ Seligman, Courtney. "NGC 1311". Celestial Atlas. Retrieved Jun 15, 2024.
  3. ↑ "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-10-01.
  4. ↑ "The Local Volume HI Survey". www.narrabri.atnf.csiro.au. Retrieved 2025-10-01.
  5. ↑ "NGC 1311 - spiral galaxy with bar. Description NGC 1311:". kosmoved.ru. Retrieved 2025-10-01.
  6. ↑ Ford, Dominic. "NGC1311 (Galaxy)". In-The-Sky.org. Retrieved 2025-10-01.
  7. ↑ Astronomy, Go. "NGC 1311 | galaxy in Horologium | New General Catalogue". Go-Astronomy.com. Retrieved 2025-10-01.
  8. ↑ "DOCdb - NGC 1311". www.docdb.net. Retrieved 2025-10-01.
  9. ↑ "NGC 1311 - Barred Spiral Galaxy in Horologium | TheSkyLive". theskylive.com. Retrieved 2025-10-01.
  10. ↑ 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.
  11. ↑ Eskridge, Paul B.; Grijs, Richard de; Anders, Peter; Windhorst, Rogier A.; Mager, Violet A.; Jansen, Rolf A. (2007-10-18), Star Clusters in the Nearby Late-Type Galaxy NGC 1311, arXiv, doi:10.48550/arXiv.0710.3614, arXiv:0710.3614, retrieved 2025-10-01
  12. ↑ Eskridge, Paul B.; Windhorst, Rogier A.; Mager, Violet A.; Jansen, Rolf A. (2010-11-01). "THE YOUNG STELLAR POPULATION OF THE NEARBY LATE-TYPE GALAXY NGC 1311". The Astronomical Journal. 140 (5): 1137–1149. doi:10.1088/0004-6256/140/5/1137. ISSN   0004-6256.
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