ZEN and the search for high-redshift galaxies
| dc.creator | Willis, J. P. | |
| dc.creator | Courbin, F. | |
| dc.creator | Kneib, J-P. | |
| dc.creator | Minniti, D. | |
| dc.date | 2005-09-20 | |
| dc.date.accessioned | 2026-07-07T06:26:18Z | |
| dc.date.available | 2026-07-07T06:26:18Z | |
| dc.description | We present the ZEN (z equals nine) survey: a deep, narrow J-band search for proto-galactic Lya emission at redshifts z=9. In the first phase of the survey, dubbed ZEN1, we combine an exceptionally deep image of the Hubble Deep Field South, obtained using a narrow band filter centred on the wavelength 1.187 microns, with existing deep, broad band images covering optical to near infrared wavelengths. Candidate z=9 Lya-emitting galaxies display a significant narrow band excess relative to the Js-band that are undetected at optical wavelengths. We detect no sources consistent with this criterion to the 90% point source flux limit of the NB image, F_NB = 3.28e-18 ergs/s/cm2. The survey selection function indicates that we have sampled a volume of approximately 340 h^{-3} Mpc3 to a Lya emission luminosity of 10e43 h^{-2} ergs/s. When compared to the predicted properties of z=9 galaxies based upon no evolution of observed z=6 Lya-emitting galaxies, the `volume shortfall' of the current survey, i.e. the volume required to detect this putative population, is a factor of at least 8 to 10. We also discuss continuing narrow J-band imaging surveys that will reduce the volume shortfall factor to the point where the no-evolution prediction from z=6 is probed in a meaningful manner. | |
| dc.description | To appear in proceedings of UC Irvine May 2005 workshop on "First Light & Reionization", eds. E. Barton & A. Cooray, New Astronomy Reviews, in press | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0509600 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0509600 | |
| dc.identifier | New Astron.Rev. 50 (2006) 70-74 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/97068 | |
| dc.subject | Astrophysics | |
| dc.title | ZEN and the search for high-redshift galaxies | |
| dc.type | text |