Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998larm.confe.146a&link_type=abstract
"IX Latin American Regional IAU Meeting, "Focal Points in Latin American Astronomy", held in Tonantzintla, Mexico, Nov 9-13, 199
Astronomy and Astrophysics
Astronomy
Scientific paper
The environments of high-redshift QSOs have proven to be an ideal framework for the quest of young galaxies. The z=2 to 3 epoch is especially interesting because QSO activity peaks at these redshifts and, also, because hierarchical models for structure formation predict that galaxies assemble their constituents at this epoch. At z=2 the luminosities, colours and sizes of the hosts overlap with the most actively star-forming galaxies in the nearby Universe, but with star formation rates of hundreds of solar masses per year, they are an order of magnitude more luminous than field galaxies at similar redshifts and above detected through Lyman break techniques. Indeed, the K-band luminosity of at least one of the hosts speaks of a galaxy about 5~mag brighter than an unevolved L* galaxy at z=2, implying that the QSO hosts might be revealing the formation of some large spheroids.
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