Holmberg IX

Infobox Galaxy
name = Holmberg IX


caption = Holmberg IX Dwarf Galaxy on DSS2, 9′ view
credit = Palomar Observatory/STScI/WikiSky
epoch = 2000
ra = RA|09|57|32.1 Cite web | title = SIMBAD: UGC 5336 | url = http://simbad3.u-strasbg.fr/sim-id.pl?Ident=UGC%205336]
dec = DEC|+69|02|46
constellation name =
z =
dist_ly = 12 Mly
type = dI
appmag_v = 16.5
size_v = 1.41 ± 0.07
notes =
names = 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

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.Cite journal | title = Holmberg IX: The Nearest Young Galaxy | first = E. | last = Sabbi | coauthors = Gallagher, J. S.; Smith, L. J.; de Mello, D. F.; Mountain M. | date = March 2006 | journal = The Astrophysical Journal | volume = 676 | pages = L113–L117 | url = http://arxiv.org/abs/0802.4446 | doi = 10.1086/587548] It is also home to one of two newly discovered yellow supergiant eclipsing binary systems.Cite news | title = Two new Star Systems are the First of Their kind Ever Found | url = http://researchnews.osu.edu/archive/superyellow.htm] Cite news | title = Two Yellow Supergiant Eclipsing Binary Systems Discovered: First Of Their Kind Ever Found | date = 2008-04-01 | publisher = Scinece Daily | url = http://www.sciencedaily.com/releases/2008/03/080331135542.htm]

Further reading

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External links

* [http://seds.org/Messier/more/m081_hom9.html M81's satellite galaxy Holmberg IX]
* [http://www.astro.umd.edu/~lwinter/holm9/xmm1.html Holmberg IX: XMM1]
* [http://photojournal.jpl.nasa.gov/catalog/PIA09337 GALEX Completes Four Star-Studded Years in Space]
* [http://hubblesite.org/gallery/album/galaxy_collection/pr2008002d/ Dwarf Galaxy Holmberg IX]
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References