NGC 1375

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NGC 1375
NGC 1374 & NGC 1375.png
Hubble Space Telescope image of NGC 1375 (down) and NGC 1374 (up)
Observation data (J2000 epoch)
ConstellationFornax
Right ascension03h 35.16m [1]
Declination−35° 13′[1]
Redshift643 km/s
Distance8.5 megaparsecs (28 Mly)
Apparent magnitude (V)12.2[1]
Characteristics
TypeSB0 pec[1]
Apparent size (V)2.3′ × 0.9′[1] (23 000 light-years in diameter)
Notable featuresBoxy-shaped bulge
Other designations
MCG -06-08-030, PGC 13266[2]

NGC 1375 is barred lenticular galaxy in constellation Fornax discovered by John Herschel on November 29, 1837. It is believed to be member of Fornax Cluster.

Distance and diameter estimates[]

It is at the estimated distance of 28 million light years. This distance is calculated by its estimate of recession velocity, the lowest one in entire Fornax Cluster, about 643 km/s. This led to uncertainties to its membership of Fornax Cluster and it also means it is uncertain form a pair with another nearby galaxy on the night sky, NGC 1374, and thus, NGC 1375 may be a simply foreground galaxy that has nothing to do with Fornax Cluster.

NGC 1375 is a member of the , which also includes NGC 1386, and ., galaxies with similar uncertainties in distance.[3] Its position on the night sky is near the center of cluster and central galaxy NGC 1399, while closest galaxy after NGC 1374, outside the pair, is . NGC 1375's size on night sky is 2.3' x 0.9′ which with galaxy's distance gives diameter of 23,000 light-years.

Classification[]

NGC 1375 is an early-type galaxy with a Hubble classification of SB0 pec, indicating it is a barred lenticular galaxy.

Despite their name, early-type galaxies are much older than spiral galaxies, and mostly comprise old, red-colored stars. Very little star formation occurs in these galaxies; the lack of star formation in elliptical galaxies appears to start at the center and then slowly propagates outward.[4] This is an early-type lenticular galaxy, with similar nature as early-type ellipticals.

Boxy-shaped bulge[]

This galaxy contains a boxy-shaped bulge. It is one of the few lenticular galaxies containing it, one of the other galaxies is . Boxy-shaped bulges are found in mostly edgewise galaxies to date. Origin of this bulge is unknown.

However, recent studies show they are not possible only for edge-on galaxy but for galaxies with inclination less than 70°, with type S0 and Sb, like NGC 1532, also in Fornax Cluster. This bulges are found in other galaxies, with much less inclination. Examples for this are barred spiral galaxies and .[5]

References[]

  1. ^ a b c d e Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 978-0-00-717223-8.
  2. ^ "NGC 1375". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-22.
  3. ^ "Les amas du Fourneau et de l'Eridan". atunivers.free.fr. Retrieved 2020-04-29.
  4. ^ Howell, Elizabeth (2015). "Colossal Ancient Galaxies Die from the Inside Out". space.com. Retrieved 5 March 2017.
  5. ^ Erwin, Peter; Debattista, Victor P. (June 2013). "Peanuts at an angle: detecting and measuring the three-dimensional structure of bars in moderately inclined galaxies". MNRAS. 431 (4): 3060–3086. Bibcode:2013MNRAS.431.3060E. doi:10.1093/mnras/stt385. ISSN 0035-8711.

External links[]

  • Media related to NGC 1375 at Wikimedia Commons
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