Andromeda XIX

Andromeda XIX
Observation data
Constellation Andromeda
Right ascension 00h 19m 32.10s[1]
Declination +35° 02′ 37.1″[1]
Redshift 0.003903[1]
Characteristics
Type dG
Half-light radius (physical) 1700 pc
Notable features Satellite of Andromeda Galaxy
Other designations
And XIX, LEDA 5056919[1]

Andromeda XIX is a satellite galaxy of the Andromeda Galaxy (M31), a member of the Local Group, like the Milky Way Galaxy.[2] Andromeda XIX is considered "the most extended dwarf galaxy known in the Local Group",[3] and has been shown to have a half-light radius of 1.7 kiloparsec (kpc).[3] It was discovered by the Canada–France–Hawaii Telescope, and is thought to be a dwarf galaxy.

History

Surveillance performed during use of the MegaPrime/MegaCam 1 deg2 (camera) on the Canada-France-Hawaii Telescope (CFHT) had mapped the Andromeda Galaxy's stellar halo (one quarter) up to ~150 kpc.[4] The survey, which had confirmed the clumpiness of Andromeda's stellar halo, had shown the existence of multiple other dwarf galaxies.[4] They include: Andromeda XI, XII, XIII, XV, XVI, XVIII, XIX, and XX.[4]

See also

References

  1. 1 2 3 4 "Results for ANDROMEDA XIX". NASA/IPAC Extragalactic Database. Retrieved January 15, 2017.
  2. ↑ "Chart (Local Galaxies)". University of Northern Iowa. Retrieved 18 April 2012.
  3. 1 2 McConnachie, Alan W.; Huxor, Avon; Martin, Nicolas F.; Irwin, Mike J.; Chapman, Scott C.; Fahlman, Gregory; Ferguson, Annette M. N.; Ibata, Rodrigo A.; et al. (1 December 2008). "A Trio of New Local Group Galaxies with Extreme Properties". The Astrophysical Journal. 688 (2): 1009–1020. arXiv:0806.3988. Bibcode:2008ApJ...688.1009M. doi:10.1086/591313. Retrieved 18 April 2012.
  4. 1 2 3 Martin, Nicolas F.; McConnachie, Alan W.; Irwin, Mike; Widrow, Lawrence M.; Ferguson, Annette M. N.; Ibata, Rodrigo A.; Dubinski, John; Babul, Arif; et al. (1 November 2009). "PAndAS' CUBS: DISCOVERY OF TWO NEW DWARF GALAXIES IN THE SURROUNDINGS OF THE ANDROMEDA AND TRIANGULUM GALAXIES". The Astrophysical Journal. 705 (1): 758–765. arXiv:0909.0399. Bibcode:2009ApJ...705..758M. doi:10.1088/0004-637X/705/1/758. Retrieved 18 April 2012.
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