The Long Faint Tail of the High-Redshift Galaxy Population

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dc.creatorSawicki, Marcin
dc.creatorIwata, Ikuru
dc.creatorOhta, Kouji
dc.creatorThompson, David
dc.creatorTamura, Naoyuki
dc.creatorAkiyama, Masayuki
dc.creatorAoki, Kentaro
dc.creatorAndo, Masataka
dc.creatorKiuchi, Gaku
dc.date2006-12-05
dc.date.accessioned2026-07-07T07:31:04Z
dc.date.available2026-07-07T07:31:04Z
dc.descriptionWe study the properties of very faint, sub-L* Lyman break galaxies at z~2-5 - thus far a largely neglected but numerically and energetically very important population. We find that the LBG luminosity function undergoes luminosity-dependent evolution: the number of luminous galaxies remains constant while the number of faint ones grows with time. The total UV luminosity density increases with cosmic time from at least z~5 until reaching a peak or a plateau around z~2 - behaviour that is governed by the sub-L* galaxies in the LF's "faint tail". Using broadband SED fitting we find a nearly-linear relationship between SFR and galaxy stellar mass at z~2. A typical L* LBG at z~2 shows a stellar mass of ~10^10M_sun, remarkably similar to the bimodality mass at low redshift. This similarity suggests that the mechanisms responsible for the galaxy bimodality at low-z may have also been at play at z~2.
dc.descriptionTo appear in the proceedings of 'At the Edge of the Universe', October 2006, Sintra, Portugal
dc.identifierhttps://arxiv.org/abs/astro-ph/0612117
dc.identifierhttp://arxiv.org/abs/astro-ph/0612117
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/118623
dc.subjectAstrophysics
dc.titleThe Long Faint Tail of the High-Redshift Galaxy Population
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