Leaky IGM at z=6 or Lyman Alpha Galaxy at z=5?

Details Leaky IGM at z=6 or Lyman Alpha Galaxy at z=5? Leaky IGM at z=6 or Lyman Alpha Galaxy at z=5?

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9734w&link_type=abstract

HST Proposal ID #9734

Physics

Hst Proposal Id #9734 Cosmology

Scientific paper

We propose to image the z=6.4 quasar SDSS J1148+5251 with the ACS using a narrow-band ramp filter in the Lyman Beta Gunn-Peterson absorption trough. The observations will distinguish between two possible explanations for several weak emission features seen in a long-exposure Keck spectrum. Either there are high-ionization bubbles in the IGM at z=6 that allow light from the quasar to leak through the Lyman Beta forest, or there is an intervening Lyman alpha emitting galaxy at z=5 {as suggested by C IV absorption at the same redshift.} If there is a galaxy, it may be associated with a lensing mass concentration at z=5.

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