Astronomy:NGC 1533

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Short description: Galaxy in the constellation Dorado
NGC 1533
NGC 1533 .jpg
Observation data (J2000 epoch)
ConstellationDorado
Right ascension 04h 09m 51.8s[1]
Declination−56° 07′ 06″[1]
Redshift790 ± 5 km/s[1]
Distance62 ± 4 Mly (19.0 ± 1.1 Mpc)[2][a]
Apparent magnitude (V)11.7[1]
Characteristics
Type(L)SB(rs)00[1]
Apparent size (V)2.8′ × 2.3′[1]
Other designations
PGC 14582[1]

NGC 1533 is a barred lenticular galaxy with faint spiral structure in the constellation Dorado. The seventh-brightest member of the Dorado Group and 1°[3] off the group's center,[2] it is surrounded by a vast arc or ring of H I which is connected to IC 2038 and IC 2039.[2] The ring orbits around 32 kpc from the center.[3][b] As is typical of lenticular galaxies, star formation is weak in NGC 1533.[2] Using both the surface brightness fluctuation (SBF) and globular cluster luminosity function (GCLF) methods, its distance was estimated in 2007 to be 19.4 ± 1.1 Mpc and 18.6 ± 2.0 Mpc respectively.[2] Averaging these together gives a distance of around 19 million parsecs or 62 million light-years from earth.[a] In 1970, a supernova was detected in NGC 1533.[4]

NGC 1533 was discovered by John Herschel on December 5, 1834.

Notes

  1. ^ average(19.4 ± 1.1, 18.6 ± 2.0) = ((19.4 + 18.6) / 2) ± ((1.12 + 2.02)0.5 / 2) = 19.0 ± 1.1
  2. ^ 35 kpc calculated assuming a distance of 21 Mpc[3] converts to a distance of 32 (35 ÷ 21 × 19) kpc for the current distance estimate of 19 Mpc

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "NASA/IPAC Extragalactic Database". Results for NGC 1533. http://nedwww.ipac.caltech.edu/. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 DeGraaff, Regina Barber; Blakeslee, John P.; Meurer, Gerhardt R.; Putman, Mary E. (December 2007). "A Galaxy in Transition: Structure, Globular Clusters, and Distance of the Star-Forming S0 Galaxy NGC 1533 in Dorado". The Astrophysical Journal 671 (2): 1624–1639. doi:10.1086/523640. Bibcode: 2007ApJ...671.1624D. 
  3. ↑ 3.0 3.1 3.2 Ryan-Weber, Emma; Webster, Rachel; Bekki, Kenji (April 2003). "Galactic Recycling: The HI Ring Around NGC 1533". in Jessica L. Rosenberg. The IGM/Galaxy Connection. Astrophysics and Space Science Library. 281. Dordrecht: Kluwer Academic Publishers. pp. 223–228. doi:10.1007/978-94-010-0115-1_40. ISBN 978-1-4020-1289-1. Bibcode: 2003ASSL..281..223R. 
  4. ↑ Evans, R. (1970). "Supernova in NGC 1533.". IAU Circ. 2279 (2279): 1. Bibcode: 1970IAUC.2279....1E. 

External links


Coordinates: Sky map 04h 09m 51.8s, −56° 07′ 06″



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