Presentation 1 : Oral
Extension of Lyman_alpha Complexes from HST Observations of Four Pairs of Quasars
Aracil Bastien, Patrick Petitjean, Alain Smette, Jean Surdej,
Jan Peter Mucket, Stefano Cristiani
We present HST observations of four pairs of quasars with ~2,3 arcmin
angular separation and redshift z~0.9. We apply the
Nearest-Neighbor method to the sample of observed Lyman_alpha lines
with rest equivalent width greater than 0.3 Angstrum. According to Monte-Carlo
simulations, we detect an excess of coincidences with velocity difference
smaller than 500 km/s.