NGC 4123

NGC 4123
NGC 4123 with Legacy Surveys DR10
Observation data (J2000 epoch)
Right ascension12h 08m 11.119s[1]
Declination+02° 52′ 41.78″[1]
Redshift0.00429±0.00002[2]
Heliocentric radial velocity1,326[3] km/s
Distance75 ± 14 Mly (22.9 ± 4.2 Mpc)[4]
Apparent magnitude (V)11.4[5]
Apparent magnitude (B)13.10[3]
Characteristics
TypeSBx(rs)ab[6]
Mass/Light ratio2.25[7] M☉/L☉
Apparent size (V)1.900′ × 0.646′[8] (NIR)
Other designations
NGC 4123, UGC 7116, PGC 38531, LEDA 38531, Mrk 1466[9]
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NGC 4123 is a modest-sized,[10] strongly-barred spiral galaxy[7] located 75 million light-years[4] away in the equatorial constellation of Virgo. It was discovered February 25, 1784 by William Herschel.[5] This is a member of the Virgo cluster, and it belongs to a group of three galaxies.[11] A companion galaxy, NGC 4116, lies at an angular separation of 14′ to the southwest. There is no indication of an interaction between the two galaxies.[7] The third member of the group is NGC 4179.[11]

Hubble Space Telescope image of NGC 4123

The morphological classification of NGC 4123 is SBx(rs)ab, which indicates this is a spiral galaxy with a central X-shaped bar (SBx) encircled by an incomplete ring structure (rs) and moderate to tightly wound spiral arms (ab). The plane of the galaxy is inclined at an angle of 46.9° to the line of sight from the Earth. It lacks a large spheroidal bulge at the core, showing only a luminous point-like source.[10] Blue knots in the outer spiral arms indicate that star formation is ongoing.[7] The galaxy has a stellar mass of 1.95×1010 M☉[6] with a star formation rate of 3.429±3.281 M☉·yr−1.[12] The atomic gas in the galaxy has a mass of 1.06×1010 M☉.[10]

Radio emission has been detected from an HII nucleus, which is consistent with it having a weak active galactic nucleus.[13] If there is a supermassive black hole at the core, it has an estimated mass of 107 M☉.[14]

  1. ^ a b Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Abazajian_et_al_2009 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Voyer_et_al_2014 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Haynes_et_al_2019 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Seligman was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Diaz-Garcia_2021 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Weiner_et_al_2001a was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Skrutskie_et_al_2006 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference Weiner_et_al_2001b was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Kim_et_al_2014 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Lianou_et_al_2019 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Ulvestad_Ho_2002 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Dong_De_Robertis_2006 was invoked but never defined (see the help page).