Holmberg IX
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| Holmberg IX | |
 |
|
| Observation data (2000 epoch) | |
|---|---|
| Right ascension | 09h 57m 32.1s [1] |
| Declination | +69° 02′ 46″ [1] |
| Distance | 12 Mly |
| Type | dI [1] |
| Apparent dimensions (V) | 1.41 ± 0.07 [1] |
| Apparent magnitude (V) | 16.5 [1] |
| Other designations | |
| UGC 5336, Anon 0953+69, [B93] 17, DDO 66, 2E 0953.7+6918, 2E 2199, 1ES 0953+69.3, HIJASS J0957+69A, Holmberg IX, [IW2001] H42, [IW2001] P63, K68 62, LEDA 28757, Mailyan 48, MCG+12-10-012, [MI94] Im 62, SPB 118, PGC 28757 | |
| See also: Galaxy, List of galaxies | |
Holmberg IX is a dwarf irregular galaxy and a satellite galaxy of M81. Based on the observed age distribution of stars it contains it is thought to have formed within the last 200 Myr making it the youngest nearby galaxy.[2] It is also home to one of two newly discovered yellow supergiant eclipsing binary systems.[3][4]
[edit] Further reading
- Prieto, J. L.; et al. (January 2008). "LBT Discovery of a Yellow Supergiant Eclipsing Binary in the Dwarf Galaxy Holmberg IX". The Astrophysical Journal 673 (1): L59–L62. doi:.
- Winter, Lisa M.; Mushotzky, Richard F.; Reynolds, Christopher S. (2007). "Elemental Abundances of Nearby Galaxies through High Signal-to-Noise Ratio XMM-Newton Observations of Ultraluminous X-Ray Sources". The Astrophysical Journal 655 (1): 163–178. doi:.
- Fabien, Grisé; Pakull, Manfred W.; Motch, Christian (2006-05-12). "The Ultraluminous X-ray Source in Holmberg IX and its Environment". Proceedings of the International Astronomical Union 1: 302–303. doi:.
- Makarova, L. (2002). "Tidal dwarfs in the M81 group: the second generation?". Astronomy and Astrophysics 396: 473–487. doi:.
- Schulte-Ladbeck, R. E.; Hopp, U. (1987). "The Dwarf Irregular Galaxy Holmberg IX". Mitteilungen der Astronomischen Gesellschaft 70: 427.
- Bertola, F.; Maffei, P. (1974). "Two Faint Companions to M81". Astronomy and Astrophysics 32: 117.
- Holmberg, E. (1969). "A study of physical groups of galaxies". Arkiv för Astronomii 5: 305–343.
- van den Bergh, Sidney (1959). "A catalogue of dwarf galaxies". Publications of the David Dunlap Observatory 2 (5). University of Toronto.
[edit] External links
- M81's satellite galaxy Holmberg IX
- Holmberg IX: XMM1
- GALEX Completes Four Star-Studded Years in Space
- Dwarf Galaxy Holmberg IX
- The Holmberg IX on the WikiSky: DSS2, SDSS, IRAS, Hidrogen α, X-Ray, Astrophoto, Sky Map
[edit] References
- ^ a b c d e SIMBAD: UGC 5336.
- ^ Sabbi, E.; Gallagher, J. S.; Smith, L. J.; de Mello, D. F.; Mountain M. (March 2006). "Holmberg IX: The Nearest Young Galaxy". The Astrophysical Journal 676: L113–L117. doi:.
- ^ "Two new Star Systems are the First of Their kind Ever Found".
- ^ "Two Yellow Supergiant Eclipsing Binary Systems Discovered: First Of Their Kind Ever Found", Scinece Daily, 2008-04-01.
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