[en] 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Aracil, B.; Institut d'Astrophysique de Paris, 98 bis Boulevard Arago, 75014, Paris, France:
Petitjean, P.; Institut d'Astrophysique de Paris, 98 bis Boulevard Arago, 75014, Paris, France
Smette, A.; Institut d'Astrophysique de Paris, 98 bis Boulevard Arago, 75014, Paris, France
Surdej, Jean ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Mucket, J. P.; Institut d'Astrophysique de Paris, 98 bis Boulevard Arago, 75014, Paris, France
Cristiani, S.; Institut d'Astrophysique de Paris, 98 bis Boulevard Arago, 75014, Paris, France
Language :
English
Title :
Extension of Lyman-alpha Complexes from HST Observations of Four Pairs of Quasars
Publication date :
01 June 2002
Event name :
2002, Semaine de l’Astrophysique française
Event place :
Paris, France
Event date :
June 24-29, 2002
By request :
Yes
Audience :
International
Main work title :
SF2A-2002: Semaine de l'Astrophysique Francaise
Editor :
Combes, F.
Barret, D.
Collection name :
EdP-Sciences (Edition de Physique), Conference Series
