E. Richards

Publications (2)0 Total impact

• Article: Submillimeter Imaging of a Protocluster Region at Z=3.09

  S ~C Chapman, G ~F Lewis, D Scott, E Richards, C Borys, C ~C Steidel, K ~L Adelberger, A ~E Shapley
  apjl. 02/2001; 548:L17-L21.
• Source

  Available from: arxiv.org

  Article: Sub-mm imaging of a proto-cluster region at z=3.09

  S. C. Chapman, G. F. Lewis, D Scott, E. Richards, C. Borys, C. C. Steidel, K. L. Adelberger, A. E. Shapley
  [show abstract] [hide abstract]
  ABSTRACT: We have used the Submillimetre Common-User Bolometer Array (SCUBA) detector on the James Clerk Maxwell Telescope (JCMT) to measure bright sub-mm emission associated with a recently discovered extensive (>100/h kpc) and highly luminous, `blob' of Ly-alpha emission at z=3.09. The blob lies within a known large overdensity of optical sources in the z=3.07-3.11 range, and is centered on a locally overdense peak within this region. The best explanation for the copious sub-mm emission is a dust obscured continuum source, which may produce the ionizing flux for the Ly-alpha cloud. Cooling gas explanations are plausible but excessively complicated, and the 450/850 micron ratio rules out a significant fraction of the signal arising from the Sunyaev-Zel'dovich increment. At least two additional ~10 mJy sub-mm detections in the SCUBA map, with a surface density significantly higher than in blank field surveys, suggests that they may be associated with the z=3.09 structure. A SCUBA `photometry' observation of a second nearby Ly-alpha blob tentatively detects a weaker sub-mm counterpart. Comment: 5 pages, 2 figures, accepted in ApJ letters
  10/2000;