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The topology of the intergalactic medium from multiple lines of sight to quasars

Published online by Cambridge University Press:  06 October 2005

S. Caucci ,
P. Petitjean ,
C. Pichon ,
F. Stoehr ,
E. Rollinde ,
S. Colombi  and
F. Coppolani
S. Caucci
Affiliation:
Institut d'Astrophysique de Paris - 98bis bd Arago, 75014 Paris, France
P. Petitjean
Affiliation:
Institut d'Astrophysique de Paris - 98bis bd Arago, 75014 Paris, France
C. Pichon
Affiliation:
Institut d'Astrophysique de Paris - 98bis bd Arago, 75014 Paris, France
F. Stoehr
Affiliation:
Institut d'Astrophysique de Paris - 98bis bd Arago, 75014 Paris, France
E. Rollinde
Affiliation:
Institut d'Astrophysique de Paris - 98bis bd Arago, 75014 Paris, France
S. Colombi
Affiliation:
Institut d'Astrophysique de Paris - 98bis bd Arago, 75014 Paris, France
F. Coppolani
Affiliation:
European Southern Observatory - Alonso de Córdova 3107, Vitacura, Santiago, Chile
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Abstract

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The spatial distribution of the gas in the intergalactic medium and its physical properties can be recovered thanks to the characteristics of the Ly$\alpha$ absorption lines that are observed in the spectra of high redshift quasars, the so-called Ly$\alpha$ forest. We use inversion methods applied to a network of lines of sight to infer the topology of the intergalactic medium, based on reconstruction of the density field. The method has already been tested on simulated data.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Colloquium C199: Probing Galaxies through Quasar Absorption Lines , March 2005 , pp. 406 - 408
Copyright
© 2005 International Astronomical Union