NGC 7421

Source: Wikipedia, the free encyclopedia.
NGC 7421
′[3]
Other designations
NGC 7421, LEDA 70083, MCG -06-50-015[6]

NGC 7421 is a barred spiral galaxy in the southern constellation of Grus. It was discovered by English astronomer John Herschel on August 30, 1834.[7] In Danish astronomer J. L. E. Dreyer's New General Catalogue of Nebulae and Clusters of Stars it was described as: considerably bright, large, very little extended, gradually pretty much brighter middle, and partially resolved.[3] NGC 7421 is located at an estimated distance of 81.6 million light-years (25.01 Mpc) from the Sun.[2] It is a member of the IC 1459 galaxy group.[5]

In the Third Reference Catalogue of Bright Galaxies, NGC 7421 was assigned a

neutral hydrogen atoms. New stars are forming at a rate of 0.274±0.041 M☉·yr−1. The gas fraction and star formation rate is significantly lower than normal, suggesting an interaction with the external environment.[5]

The western boundary of this galaxy resembles a

angular separation of ~20′. However, there are no tidal tails visible from such an encounter.[9] The total mass of the neutral hydrogen in this galaxy is 1.5×109 M☉.[8]

The type II supernova SN 2023abdg was observed in association with this galaxy. It was discovered on December 12, 2023, by ATLAS.[10]

See also

  • NGC 4654, a galaxy in Virgo with a similar appearance[9]

References

  1. ^
    doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR
    .
  2. ^
    S2CID 11672751
    .
  3. ^ a b c Frommert, Hartmut, "NGC 7421", Students for the Exploration and Development of Space, retrieved 2024-02-05.
  4. ^
    Bibcode:1991rc3..book.....D
    .
  5. ^
    doi:10.3847/1538-4365/ac7eba
    .
  6. ^ "NGC 7421". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2024-02-01.
  7. ^ Seligman, Courtney, "NGC Objects: NGC 7400 - 7449", Celestial Atlas, retrieved 2024-02-05.
  8. ^
    doi:10.1071/AS97081
    .
  9. ^
    Bibcode:2000ASPC..197..405R
    .
  10. ^ "SN 2023abdg", Transient Name Server, retrieved 2024-02-04.
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