The Halpha Luminosity Function of the Galaxy Cluster Abell 521 at z = 0.25

Details The Halpha Luminosity Function of the Galaxy Cluster Abell 521 at z = 0.25 The Halpha Luminosity Function of the Galaxy Cluster Abell 521 at z = 0.25

2003-10-08

arxiv.org/abs/astro-ph/0310212v1

Astrophys.J. 601 (2004) 805-812

Astronomy and Astrophysics

Astrophysics

21 pages, 7 figures, ApJ, Part 1, in press

Scientific paper

10.1086/380555

We present an optical multicolor-imaging study of the galaxy cluster Abell 521 at $z = 0.25$, using Suprime-Cam on the Subaru Telescope, covering an area of $32 \times 20$ arcmin$^2$ ($9.4 \times 5.8 h_{50}^{-2}$ Mpc$^2$ at $z = 0.25$). Our imaging data taken with both a narrow-band filter, $NB816$ ($\lambda_0 = 8150$\AA and $\Delta \lambda = 120$\AA), and broad-band filters, $B,V,R_{\rm C}, i^\prime$, and $z^\prime$ allow us to find 165 H$\alpha$ emitters. We obtain the H$\alpha$ luminosity function (LF) for the cluster galaxies within 2 Mpc; the Schechter parameters are $\alpha = -0.75 \pm 0.23$, $\phi^\star = 10^{-0.25 \pm 0.20}$ Mpc$^{-3}$, and $L^\star = 10^{42.03 \pm 0.17}$ erg s$^{-1}$. Although the faint end slope, $\alpha$, is consistent with that of the local cluster H$\alpha$ LFs, the characteristic luminosity, $L^\star$, is about 6 times (or $\approx 2$ mag) brighter. This strong evolution implies that Abell 521 contains more active star-forming galaxies than the local clusters, being consistent with the observed Butcher-Oemler effect. However, the bright $L^\star$ of Abell 521 may be, at least in part, due to the dynamical condition of this cluster.

Affiliated with

Also associated with

No associations

Rating

The Halpha Luminosity Function of the Galaxy Cluster Abell 521 at z = 0.25 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 The Halpha Luminosity Function of the Galaxy Cluster Abell 521 at z = 0.25, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Halpha Luminosity Function of the Galaxy Cluster Abell 521 at z = 0.25 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-640455