Astronomy:NGC 3568

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NGC 3568
NGC 3568 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationCentaurus
Right ascension 11h 10m 48.4926s[1]
Declination−37° 26′ 51.601″[1]
Redshift0.008152±0.00000700[1]
Helio radial velocity2,444±2 km/s[1]
Distance81.96 ± 3.65 Mly (25.128 ± 1.119 Mpc)[2]
Group or clusterNGC 3557 group (LGG 229)
Apparent magnitude (V)13.00[1]
Characteristics
TypeSB(s)c[1]
Size~91,000 ly (27.91 kpc) (estimated)[1]
Apparent size (V)2.5′ × 0.8′[1]
Other designations
ESO 377- G 020, IRAS 11084-3710, MCG-06-25-009, PGC 33952[1]

NGC 3568 is a barred spiral galaxy in the constellation of Centaurus. Its velocity with respect to the cosmic microwave background is 2,764±22 km/s, which corresponds to a Hubble distance of 132.9 ± 9.4 Mly (40.76 ± 2.87 Mpc).[1] However, 25 non-redshift measurements give a much closer mean distance of 81.96 ± 3.65 Mly (25.128 ± 1.119 Mpc).[2] It was discovered by British astronomer John Herschel on 21 April 1835.[3]

NGC 3568 is a Seyfert I 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.[4][5]

NGC 3557 group

NGC 3568 is a member of the NGC 3557 group (also known as LGG 229) which has at least 11 galaxies, including NGC 3533 (fr), NGC 3557, NGC 3557B (d), NGC 3564 (fr), and NGC 3573 (fr), among others.[6][7]

Supernova

One supernova has been observed in NGC 3568:

  • SN 2014dw (Type II, mag. 15.5) was discovered by Stu Parker on 6 November 2014.[8][9]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 "Results for object NGC 3568". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+3568. 
  2. ↑ 2.0 2.1 "Distance Results for NGC 3568". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3568. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 3568". https://cseligman.com/text/atlas/ngc35a.htm#3568. 
  4. ↑ Chen, Yan-Ping; Zaw, Ingyin; Farrar, Glennys R.; Elgamal, Sana (2022). "A Uniformly Selected, Southern-sky 6dF, Optical AGN Catalog". The Astrophysical Journal Supplement Series 258 (2): 29. doi:10.3847/1538-4365/ac4157. Bibcode: 2022ApJS..258...29C. 
  5. ↑ "NGC 3568". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+3568. 
  6. ↑ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series 100: 47. Bibcode: 1993A&AS..100...47G. 
  7. ↑ "LGG 229". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LGG+229. 
  8. ↑ Parker, S.; Arcavi, I.; Hosseinzadeh, G.; Valenti, S.; Howell, D. A.; McCully, C.; Diamond, T.; Phillips, M. M. et al. (2015). "Supernova 2014dw in NGC 3568 = PSN J11104841-3727022". Central Bureau Electronic Telegrams (4047): 1. Bibcode: 2015CBET.4047....1P. 
  9. ↑ "SN 2014dw". IAU. https://www.wis-tns.org/object/2014dw. 

Coordinates: Sky map 11h 10m 48.4926s, −37° 26′ 51.601″



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