Items where Author is "Ivanchik, A."

Article

Noterdaeme, P. ; Petitjean, P. ; Ledoux, C. ; Srianand, R. ; Ivanchik, A. (2008) HD molecules at high redshift - A low astration factor of deuterium in a solar-metallicity DLA system at z = 2.418 Astronomy and Astrophysics, 491 (2). pp. 397-400. ISSN 0004-6361

Ivanchik, A. ; Petitjean, P. ; Varshalovich, D. ; Aracil, B. ; Srianand, R. ; Chand, H. ; Ledoux, C. ; Boisse, P. (2005) A new constraint on the time dependence of the proton-to-electron mass ratio. Analysis of the Q 0347-383 and Q 0405-443 spectra Astronomy and Astrophysics, 440 (1). pp. 45-52. ISSN 0004-6361

Petitjean, Patrick ; Ivanchik, A. ; Srianand, Raghunathan ; Aracil, B. ; Varshalovich, D. ; Chand, H. ; Rodriguez, Esther ; Ledoux, C. ; Boissé, Patrick (2004) Time dependence of the proton-to-electron mass ratio Comptes Rendus Physique, 5 (3). pp. 411-415. ISSN 1631-0705