Lyman alpha Emitters at redshift z ~ 4.5 in the Extended CDF-S region: I, Lyman alpha Luminosity Function

Details Lyman alpha Emitters at redshift z ~ 4.5 in the Extended CDF-S region: I, Lyman alpha Luminosity Function Lyman alpha Emitters at redshift z ~ 4.5 in the Extended CDF-S region: I, Lyman alpha Luminosity Function

2011-11-14

arxiv.org/abs/1111.3386v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

11 pages, 3 tables, 9 figures, submitted to MNRAS

Scientific paper

We present a spectroscopically confirmed Lyman alpha emitter sample at z ~ 4.5 in the Extended Chandra Deep Field South region. Starting with spectra of 68 candidate Ly-\alpha\ emitters, we identified 46 z ~ 4.5 Ly-\alpha emitters based on single-line detections with no continuum emission blueward of the line, and 5 Lyman break galaxies. The Ly-\alpha\ confirmation rate is ~ 70% for candidates selected in our two narrowband filters, and the remaining candidates including 5 Lyman Break Galaxies and one strange multi emission line object. We did not find any significant CIV emission line or HeII emission line in the optical spectra even with the coadded optical spectra. A majority of the LAEs show asymmetric Ly-\alpha\ line profile, and the coadded Ly-\alpha\ line has wavelength-based asymmetry of a_\lambda\ = 1.49$^{+0.26}_{-0.13}$ and flux-based asymmetry of a_f = 1.45$^{+0.06}_{-0.07}$. Deep X-ray, radio and the optical spectral data are also used to constrain the AGN contribution in our sample, only one detection (not targeted in spectroscopic observation) was found at z=4.5 in both X-ray and radio, while the other objects show non-detection even with a stacking method. Finally, the Ly-\alpha\ luminosity function for our z ~ 4.5 sample is consistent with others published in the literature for the redshift range of 3 < z < 6, while the Ly-\alpha\ luminosity functions in our two separate narrowband filters show a ~ 2\sigma\ difference. This difference is comparable to the differences among z = 5.7 and z = 6.5 Ly-\alpha\ luminosity functions reported by Ouchi et al. (2010), which are thought to be an implication of cosmic re-ionization.

Affiliated with

Also associated with

No associations

Rating

Lyman alpha Emitters at redshift z ~ 4.5 in the Extended CDF-S region: I, Lyman alpha Luminosity Function does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Lyman alpha Emitters at redshift z ~ 4.5 in the Extended CDF-S region: I, Lyman alpha Luminosity Function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lyman alpha Emitters at redshift z ~ 4.5 in the Extended CDF-S region: I, Lyman alpha Luminosity Function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-708006