Share to: share facebook share twitter share wa share telegram print page

NGC 1559

NGC 1559
NGC 1559 imaged by the Hubble Space Telescope
Observation data (J2000.0 epoch)
ConstellationReticulum
Right ascension4h 17m 35.8s[1]
Declination−62° 47′ 1″[1]
Redshift1304 ± 4 km/s[1]
Apparent magnitude (V)11[1]
Characteristics
TypeSB(s)cd[1]
Apparent size (V)3.5′ × 2.0′[1]
Other designations
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]

Four supernovae have been observed in NGC 1559. Australian amateur astronomer Robert Evans[6] discovered the first three: SN 1984J (type II, mag. 13.5),[7] SN 1986L (type II, mag. 13.5),[8] and SN 2005df (Type Ia, mag 12.3).[9] SN 2009ib (type IIP, mag. 14.7)[10] was discovered on 6 August 2009.

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

References

  1. ^ a b c d e f g "NASA/IPAC Extragalactic Database", Results for NGC 4650A, retrieved 2007-04-03
  2. ^ Seligman, Courtney. "NGC 1559". Celestial Atlas. Retrieved 16 August 2024.
  3. ^ Huchra, J. P.; Geller, M. J. (June 15, 1982), "Groups of galaxies. I - Nearby groups", Astrophysical Journal, 257 (Part 1): 423–437, Bibcode:1982ApJ...257..423H, doi:10.1086/160000
  4. ^ a b c d 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, arXiv:astro-ph/0207201, Bibcode:2002A&A...391...83B, doi:10.1051/0004-6361:20020642, S2CID 14749261
  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, Bibcode:1989ApJS...69..809M, doi:10.1086/191328, ISSN 0067-0049
  6. ^ "Supernova Discoveries by Rev. Robert Evans". revivals.arkangles.com/. Archived from the original on 3 March 2016. Retrieved 11 July 2015.
  7. ^ Transient Name Server entry for SN 1984J. Retrieved 25 March 2023.
  8. ^ Transient Name Server entry for SN 1986L. Retrieved 25 March 2023.
  9. ^ Transient Name Server entry for SN 2005df. Retrieved 25 March 2023.
  10. ^ Transient Name Server entry for SN 2009ib. Retrieved 25 March 2023.
Wikimedia Commons has media related to NGC 1559.


Stub icon

This spiral galaxy article is a stub. You can help Wikipedia by expanding it.
Kembali kehalaman sebelumnya