Source plane reconstruction of the giant gravitational arc in Abell
  2667: a candidate Wolf-Rayet galaxy at z~1
  We present a new analysis of HST, Spitzer telescope imaging and VLT imaging
and spectroscopic data of a bright lensed galaxy at $z$=1.0334 in the lensing
cluster Abell~2667. Using this high-resolution imaging we present an updated
lens model that allows us to fully understand the lensing geometry and
reconstruct the lensed galaxy in the source plane. This giant arc gives a
unique opportunity to peer into the structure of a high-redshift disk galaxy.
We find that the lensed galaxy of Abell 2667 is a typical spiral galaxy with
morphology similar to the structure of its counterparts at higher redshift
$z\sim 2$. The surface brightness of the reconstructed source galaxy in the
z$_{850}$ band reveals the central surface brightness $I(0)=20.28\pm0.22$ mag
arcsec$^{-2}$ and the characteristic radius $r_s=2.01\pm0.16$ kpc at redshift
$z \sim 1$. The morphological reconstruction in different bands shows obvious
negative radial color gradients for this galaxy. Moreover, the redder central
bulge tends to contain a metal-rich stellar population, rather than being
heavily reddened by dust due to high and patchy obscuration. We analyze the
VIMOS/IFU spectroscopic data and find that, in the given wavelength range
($\sim 1800-3200$ \AA), the combined arc spectrum of the source galaxy is
characterized by a strong continuum emission with strong UV absorption lines
(FeII and MgII) and shows the features of a typical starburst Wolf-Rayet galaxy
NGC5253. More specifically, we have measured the EWs of FeII and MgII lines in
the Abell 2667 spectrum, and obtained similar values for the same wavelength
interval of the NGC5253 spectrum. Marginal evidence for CIII] 1909 emission at
the edge of the grism range further confirms our expectation.
