Astronomy:NGC 1559

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NGC 1559
NGC 1559 imaged by the Hubble Space Telescope
Observation data (J2000.0 epoch)
ConstellationReticulum
Right ascension 04h 17m 35.7506s[1]
Declination−62° 47′ 01.316″[1]
Redshift1304 ± 4 km/s[1]
Distance48.73 ± 2.18 Mly (14.942 ± 0.669 Mpc)[1]
Apparent magnitude (V)11[1]
Characteristics
TypeSB(s)cd[1]
Size~75,600 ly (23.17 kpc) (estimated)[1]
Apparent size (V)3.5′ × 2.0′[1]
Other designations
ESO 084- G 010, IRAS 04170-6253, PGC 14814[1]

NGC 1559 is a barred spiral galaxy in the constellation Reticulum. It was discovered on 6 November 1826 by Scottish astronomer James Dunlop.[2]

NGC 1559 is a Seyfert 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. Although it was originally thought to be a member of the Dorado Group,[3] subsequent observations have shown that it is in fact not a member of any galaxy group or cluster and does not have any nearby companions.[4][5] NGC 1559 has massive spiral arms and strong star formation.[4] It contains a small bar which is oriented nearly east-west and spans 40″.[4] Its bar and disc are the source of very strong radio emissions.[4]

Supernovae

Supernova SN 2005df is visible as the bright star just above the galaxy (imaged by ESO's 8.2m VLT)

Four supernovae have been observed in NGC 1559:

  • SN 1984J (Type II, mag. 13.5) was discovered by Australian amateur astronomer Robert Evans[6] on 27 July 1984.[7][8]
  • SN 1986L (Type II, mag. 13.5) was discovered by Robert Evans on 7 October 1986.[9][10]
  • SN 2005df (Type Ia, mag 13.8) was discovered by Robert Evans on 4 August 2005.[11][12] It got as bright as magnitude 12.3, making it the brightest supernova observed in 2005.[13]
  • SN 2009ib (Type II-P, mag. 14.7) was discovered by the CHASE project (CHilean Automatic Supernova sEarch) on 6 August 2009.[14][15]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Results for object NGC 1559, NASA and Caltech, https://ned.ipac.caltech.edu/byname?objname=NGC+1559, retrieved 2007-04-03 
  2. ↑ Seligman, Courtney. "NGC 1559". https://cseligman.com/text/atlas/ngc15a.htm#1559. 
  3. ↑ Huchra, J. P.; Geller, M. J. (June 15, 1982), "Groups of galaxies. I - Nearby groups", Astrophysical Journal 257 (Part 1): 423–437, doi:10.1086/160000, Bibcode: 1982ApJ...257..423H 
  4. ↑ 4.0 4.1 4.2 4.3 Beck, R.; Shoutenkov, V.; Ehle, M.; Harnett, J. I. et al. (August 2002), "Magnetic fields in barred galaxies. I. The atlas", Astronomy and Astrophysics 391 (1): 83–102, doi:10.1051/0004-6361:20020642, Bibcode: 2002A&A...391...83B 
  5. ↑ Maia, M. A. G.; da Costa, L. N.; Latham, David W. (April 1989), "A catalog of southern groups of galaxies", Astrophysical Journal Supplement Series 69: 809–829, doi:10.1086/191328, ISSN 0067-0049, Bibcode: 1989ApJS...69..809M 
  6. ↑ "Supernova Discoveries by Rev. Robert Evans". Archived from the original on 3 March 2016. https://web.archive.org/web/20160303234008/http://revivals.arkangles.com/supernovadiscoveries.php. 
  7. ↑ Evans, R.; Overbeek, D.; Thompson, G. (1984). "Probable Supernova in NGC 1559". International Astronomical Union Circular (3963): 1. Bibcode: 1984IAUC.3963....1E. http://www.cbat.eps.harvard.edu/iauc/03900/03963.html. 
  8. ↑ "SN 1984J". IAU. https://www.wis-tns.org/object/1984J. 
  9. ↑ Evans, R.; McNaught, R.; Cragg, T.; Thompson, G. (1986). "Supernova 1986L in NGC 1559". International Astronomical Union Circular (4260): 1. Bibcode: 1986IAUC.4260....1E. http://www.cbat.eps.harvard.edu/iauc/04200/04260.html. 
  10. ↑ "SN 1986L". IAU. https://www.wis-tns.org/object/1986L. 
  11. ↑ Evans, R.; Gilmore, A. (2005). "Supernovae 2005dd, 2005de, and 2005df". International Astronomical Union Circular (8580): 2. Bibcode: 2005IAUC.8580....2E. http://www.cbat.eps.harvard.edu/iauc/08500/08580.html#Item2. 
  12. ↑ "SN 2005df". IAU. https://www.wis-tns.org/object/2005df. 
  13. ↑ Bishop, David. "Bright Supernovae - 2005". https://www.rochesterastronomy.org/sn2005/index.html. 
  14. ↑ Pignata, G.; Maza, J.; Hamuy, M.; Antezana, R.; Gonzalez, L.; Gonzalez, P.; Lopez, P.; Silva, S. et al. (2009). "Supernova 2009ib in NGC 1559". Central Bureau Electronic Telegrams 1902: 1. Bibcode: 2009CBET.1902....1P. 
  15. ↑ "SN 2009ib". IAU. https://www.wis-tns.org/object/2009ib. 

Coordinates: Sky map 04h 17m 35.7806s, −62° 47′ 01.316″



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