NGC 4375 is a barred spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is 9325 ± 20 km/s, which corresponds to a Hubble distance of 137.54 ± 9.63 Mpc (∼448 million light-years).[1] However, four non-redshift measurements give a distance of 105.5 Mpc (~344 million light-years).[2] The galaxy was discovered by German-British astronomer William Herschel on 11 April 1785.[3]

NGC 4375
The barred spiral galaxy NGC 4375.
Observation data (J2000 epoch)
ConstellationComa Berenices
Right ascension12h 25m 00.4734s[1]
Declination+28° 33′ 30.952″[1]
Redshift0.030153 [1]
Heliocentric radial velocity9040 ± 3 km/s[1]
Distance448.6 ± 31.4 Mly (137.54 ± 9.63 Mpc)[1]
Apparent magnitude (V)12.6[1]
Characteristics
TypeSB(r)ab pec?[1]
Size~148,000 ly (45.37 kpc) (estimated)[1]
Apparent size (V)1.4' x 1.2'[1]
Other designations
IRAS 12224+2850, 2MASX J12250049+2833306, UGC 7496, MCG +05-29-080, PGC 40449, CGCG 158-100[1]

The SIMBAD database lists NGC 4375 as a Seyfert II Galaxy, i.e. it has a quasar-like nuclei with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.[4]

Two supernovae have been observed in NGC 4375: SN 1960J (type unknown, mag. 18.5)[5][6] and SN 2023vsr (type II, mag. 17.6).[7]

See also

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References

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  1. ^ a b c d e f g h i j k "NASA/IPAC Extragalactic Database". Results for NGC 4375. Retrieved 14 August 2024.
  2. ^ "Distance Results for NGC 4375". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 14 August 2024.
  3. ^ Seligman, Courtney. "NGC 4375". Celestial Atlas. Retrieved 14 August 2024.
  4. ^ "NGC 4375". SIMBAD astronomical database. Strasbourg Astronomy Data Centre. Retrieved 14 August 2024.
  5. ^ "SN 1960J". Transient Name Server. IAU. Retrieved 14 August 2024.
  6. ^ Humason, M. L.; Gomes, Alercio M.; Kearns, C. E. (1961). "The 1960 Palomar Supernova Search". Publications of the Astronomical Society of the Pacific. 73 (432): 175. Bibcode:1961PASP...73..175H. doi:10.1086/127650.
  7. ^ "SN 2023vsr". Transient Name Server. IAU. Retrieved 14 August 2024.
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