Blue compact galaxies in the Ultra Deep Field

Details Blue compact galaxies in the Ultra Deep Field Blue compact galaxies in the Ultra Deep Field

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005assl..329p..52n&link_type=abstract

Starbursts: From 30 Doradus to Lyman Break Galaxies, Held in Cambridge, UK, 6-10 September 2004. Edited by R. de Grijs and R.M.

Astronomy and Astrophysics

Astrophysics

Scientific paper

We study the low surface brightness structure of 30 Luminous Compact Blue Galaxies (LCBGs), mostly at Z≳ 0.9, in the HST/ACS Ultra Deep Field. Deep rest-frame B surface brightness profiles reveal extended, roughly exponential components, usually hosting centrally concentrated excess emission. The exponential components are relatively compact, with scale lengths αE ˜ 1 - 2 kpc, comparable to local small disks and dwarf galaxies. Large disks (αE > 3 kpc), possibly relating LCBGs to bulge formation in massive disks at z=0, are rare. Our results indicate that most LCBGs require substantial disk growth to be progenitors of today's large disks.

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