The density, the cosmic microwave background, and the proton-to-electron mass ratio in a cloud at redshift 0.9

The kinetic temperature of a molecular cloud at redshift 0.9: ammonia in the gravitational lens PKS 1830–211

(2008) C. Henkel et al.   ASTRONOMY & ASTROPHYSICS

Drastic changes in the molecular absorption at redshift z = 0.89 toward the quasar PKS 1830–211

(2008) S. Muller et al.   ASTRONOMY & ASTROPHYSICS

Submillimeter water and ammonia absorption by the peculiar z ≈ 0.89 interstellar medium in the gravitational lens of the PKS 1830-211 system

(2008) K. M. Menten et al.   ASTRONOMY & ASTROPHYSICS

Variation of fundamental constants in space and time: Theory and observations

(2008) V. V. Flambaum   European Physical Journal-Special Topics

Revision of VLT/UVES constraints on a varying fine-structure constant

(2008) M. T. Murphy et al.   MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

A gravitationally lensed water maser in the early Universe

(2008) C. M. Violette Impellizzeri et al.   NATURE

Unifying cosmological and recent time variations of fundamental couplings

(2008) Thomas Dent et al.   PHYSICAL REVIEW D

Stringent Null Constraint on Cosmological Evolution of the Proton-to-Electron Mass Ratio

(2008) Julian A. King et al.   PHYSICAL REVIEW LETTERS

Strong Limit on a Variable Proton-to-Electron Mass Ratio from Molecules in the Distant Universe

(2008) M. T. Murphy et al.   SCIENCE

Frequency Ratio of Al+ and Hg+ Single-Ion Optical Clocks; Metrology at the 17th Decimal Place

(2008) T. Rosenband et al.   SCIENCE