Volume 379, Number 1, November III 2001
|Page(s)||96 - 106|
|Section||Cosmology (including clusters of galaxies)|
|Published online||15 November 2001|
Gravitationally lensed high redshift galaxies in the field of 1E0657-56*
Landessternwarte Heidelberg, Königstuhl, 69117 Heidelberg, Germany
2 Universitätssternwarte München, Scheinerstraße 1, 81679 München, Germany
3 Research School of Astronomy and Astrophysics, The Australian National University, Cotter Road, Weston Creek, ACT 2611, Australia
4 Universitäts-Sternwarte Göttingen, Geismarlandstraße 11, 37083 Göttingen, Germany
5 University of Hawaii, Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, Hawaii 96822, USA
Corresponding author: D. Mehlert, firstname.lastname@example.org
Accepted: 13 September 2001
We present images and long-slit spectra obtained with FORS1 at UT1 of the VLT centered on the gravitational arc of the galaxy cluster 1E0657-56 (). The cluster is one of the hottest, most massive clusters known so far and acts as a powerful gravitational telescope, amplifying the flux of background sources by up to a factor of 20. We present photometric results together with the spectra of the gravitational arc () and four additional amplified high redshift objects ( to 3.08) that were also included in the slit by chance coincidence. A magnification map has been obtained from a lens model derived from the multiple image systems. We compare our observed spectra with models and briefly discuss the stellar contents of these galaxies. Furthermore we measured the equivalent widths of the C iv 1550 and Si iv 1400 absorption lines for the objects behind 1E0657-56 studied here, as well as for some additional starburst galaxies (nearby and at high z). For C iv we find an increasing absorption equivalent width with decreasing redshift. We discuss whether this correlation could be related to the increase of metallicity with the age of the universe.
Key words: galaxies: clusters: general / galaxies: starburst / galaxies: evolution / galaxies: formation / galaxies: stellar content / galaxies: fundamental parameters
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.