@miki

A Successful Broad-band Survey for Giant Lya Nebulae I: Survey Design and Candidate Selection

, , and . (2011)cite arxiv:1111.2603Comment: Submitted to ApJ; 24 pages in emulateapj format; 17 figures, 3 tables.

Abstract

Giant Lya nebulae (or Lya "blobs") are likely sites of ongoing massive galaxy formation, but the rarity of these powerful sources has made it difficult to form a coherent picture of their properties, ionization mechanisms, and space density. Systematic narrow-band Lya nebula surveys are ongoing, but the small redshift range covered and the observational expense limit the comoving volume that can be probed by even the largest of these surveys, posing a significant problem when searching for such rare sources. We have developed a systematic search technique designed to find large Lya nebulae at 2<z<3 within deep broad-band imaging and have carried out a survey of the 9.4 square degree NOAO Deep Wide-Field Survey (NDWFS) Bootes field, corresponding to a total survey comoving volume of ~10^8 h^-3_70 Mpc^3, the largest volume survey for Lya nebulae ever undertaken. In this first paper in the series, we present the details of the survey design and the selected sample of 80 candidates, which includes one previously discovered Lya nebula.

Description

[1111.2603] A Successful Broad-band Survey for Giant Lya Nebulae I: Survey Design and Candidate Selection

Links and resources

Tags