TUNA Lunch Talk:

Huib Intema

Leiden Observatory

Large-scale structure of Lyman break galaxies around a radio galaxy protocluster at redshift z ~ 4.

February 13

12:10PM, Room 230, NRAO, Edgemont Road


The use of modern large telescopes makes it possible to observe and study the formation and evolution of clusters of galaxies. We used the Lyman break technique to identify ~900 candidate high-redshift galaxies in a wide field surrounding radio galaxy TN J1338-1942. This massive galaxy, located at a redshift z = 4.1 is known to be surrounded by a spatial overdensity of galaxies detected by their strong Lyman-alpha lines. The use of the Lyman break technique enabled us to study the distribution of galaxies by higher numbers and to larger extend. In this lunchtalk I will present the results of this study, which includes additional evidence for the presence of a proto-cluster around TN J1338-1942 as well as an analysis of the high-redshift galaxy distribution at larger scales.