The GALEX VIMOS-VLT Deep Survey Measurement of the Evolution of the 1500 Å Luminosity Function

Abstract

We present the first measurement of the galaxy luminosity function (LF) at 1500 in the range A 0 . 2 ≤ z ≤ based on Galaxy Evolution Explorer VIMOS-VLT Deep Survey observations (∼1000 spectroscopic redshifts 1.2 for galaxies with ) and at higher z using existing data sets. Our main results are summarized as NUV ≤ 24.5 follows: (1) Luminosity evolution is observed with mag between and andmag between and . This confirms that the star formation activity was significantly higher in Ϫ1.0 z p 1 z p 3 the past. (2) The LF slopes vary in the range , with a marginally significant hint of increase Ϫ1.2 ≥ a ≥ Ϫ1.65 at higher z. (3) We split the sample in three rest-frame intervals, providing an approximate spectral type (B Ϫ I) classification: Sb-Sd, Sd-Irr, and unobscured starbursts. We find that the bluest class evolves less strongly in luminosity than the two other classes. On the other hand, their number density increases sharply with z (∼15% in the local universe to ∼55% at ), while that of the reddest classes decreases. z ∼ 1

THE CLOWES-CAMPUSANO LARGE QUASAR GROUP SURVEY. I.GALEXSELECTED SAMPLE OF LYMAN BREAK GALAXIES ATz∼ 1

“…The LFs for LBG candidates in the two LQGs show an increased volume density of star-forming galaxies compared to results of less dense regions in the CDF-S (Arnouts et al 2005). The LBG LF in the foreground LQG (LQG0.8) is consistent with their parameterization of the Schechter function corresponding to 1.75 < z < 2.25.…”

“…For the CCLQG at 1.2 z < 1.5 we were only able to derive the LF for LBG candidates down to roughly 3M * , including only two bright magnitude bins. The Schechter parameterization derived by Arnouts et al (2005) for all types of NUV-selected galaxies in Figure 12 is exceeded by the data, which implies that in all four redshift bins the LBGs are over-abundant for their redshift. In the two LQGs at z ∼ 0.8 and z ∼ 1.3 the volume densities of the LBGs are consistent with Arnouts et al parameterization of the LFs at 1.75 < z < 2.25 or LBGs at 2.5 < z < 3.5.…”

“…For the 1/V max method, we followed the approach used by many other studies (e.g., Eales 1993;Lilly et al 1995;Ellis et al 1996;Arnouts et al 2005;Willmer et al 2006)…”

“…The results are compared to parameterizations of the Schechter function as derived by Arnouts et al (2005; see Figure 12). For …”

Global Star Formation Efficiency of Local Galaxies

“…The studies of starforming galaxies at different redshifts (e.g., Steidel et al, 1999;Arnouts et al, 2005;Bouwens et al, 2006Bouwens et al, , 2007Shim et al, 2011) provides strong constraints on the galaxy evolution as well as the cosmic chemical enrichment history. Thanks to the numerous deep, multi-wavelength surveys, our knowledge about star formation rate and stellar mass has been advanced significantly.…”