Astronomy:NGC 4411B

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NGC 4411B
NGC 4411B imaged by the Vera C. Rubin Observatory
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension 12h 26m 47.2398s[1]
Declination+08° 53′ 04.619″[1]
Redshift0.004243±0.000003[1]
Helio radial velocity1,272±1 km/s[1]
Distance73.06 ± 18.26 Mly (22.400 ± 5.600 Mpc)[1]
Group or clusterVirgo Cluster
Apparent magnitude (V)12.98[1]
Characteristics
TypeSAB(s)cd[1]
Size~68,000 ly (20.85 kpc) (estimated)[1]
Apparent size (V)2.5′ × 2.5′[1]
Other designations
KPG 336B, IRAS 12242+0909, UGC 7546, MCG+02-32-055, PGC 040745[1]

NGC 4411B (also known as UGC 7546) is a barred spiral galaxy in the constellation of Virgo. Its velocity with respect to the cosmic microwave background is 1,610±24 km/s, which corresponds to a Hubble distance of 77.4 ± 5.5 Mly (23.74 ± 1.70 Mpc).[1] Two non-redshift measurements give a similar distance of 73.06 ± 18.26 Mly (22.400 ± 5.600 Mpc).[2] It was discovered by French astronomer Guillaume Bigourdan on 25 April 1895.[3] There was a longstanding confusion of identification between this galaxy and the neighboring spiral galaxy NGC 4411.[3] Therefore, this galaxy, despite its common name, was not a part of the original New General Catalogue.

NGC 4411B and NGC 4411 form a pair of galaxies, referred to as KPG 336.[4] Both galaxies are members of the Virgo Cluster.

NGC 4411B is a Seyfert II Galaxy, i.e. it has a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.[5]

Supernovae

Two supernovae have been observed in NGC 4411B.

  • SN 1992ad (Type II, mag. 13.5) was discovered by Robert Evans on 1 July 1992.[6][7]
  • SN 2021smj (Type Ia, mag. 17.025) was discovered by ATLAS on 8 July 2021.[8]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 4411b". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+4411b. 
  2. ↑ "Distance Results for NGC 4411b". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+4411b. 
  3. ↑ 3.0 3.1 Seligman, Courtney. "New General Catalogue Objects: NGC 4411". https://cseligman.com/text/atlas/ngc44.htm#4411. 
  4. ↑ Karachentsev, I. D. (1972). "Catalogue of isolated pairs of galaxies in the northern hemisphere". Soobshcheniya Spetsial'noj Astrofizicheskoj Observatorii 7: 1. Bibcode: 1972SoSAO...7....1K. 
  5. ↑ "UGC 7546". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=UGC+7546. 
  6. ↑ McNaught, R. H.; Evans, R.; Spyromilio, J.; Taylor, K.; Hawkins, M.; Vernon, P. (1992). "Supernova 1992ad in NGC 4411B". International Astronomical Union Circular (5552): 1. Bibcode: 1992IAUC.5552....1M. http://www.cbat.eps.harvard.edu/iauc/05500/05552.html#Item1. 
  7. ↑ "SN 1992ad". IAU. https://www.wis-tns.org/object/1992ad. 
  8. ↑ "SN 2021smj". IAU. https://www.wis-tns.org/object/2021smj. 

Coordinates: Sky map 12h 26m 47.2398s, +08° 53′ 04.619″



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