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A precise and accurate determination of the cosmic microwave background temperature at z=0.89
S. Muller, A. Beelen, J. H. Black +6
According to the Big Bang theory and as a consequence of adiabatic expansion of the Universe, the temperature of the cosmic microwave background (CMB) increases linearly with redsh…
Molecular gas and dust in the highly magnified z = 2.8 galaxy behind the Bullet Cluster
Daniel Johansson, Cathy Horellou, Omar Lopez-Cruz +8
The gravitational magnification provided by massive galaxy clusters makes it possible to probe the physical conditions in distant galaxies that are of lower luminosity than those i…
Faint Extended OH Emission from the Local Interstellar Medium in the Direction l \approx 108\circ, b \approx 5\circ
Ronald J. Allen, Mónica Ivette Rodríguez, John H. Black +1
We have mapped faint 1667 OH line emission (TA \approx 20 - 40 mK in our \approx 30' beam) along many lines of sight in the Galaxy covering an area of \approx 4\circ \times 4\circ…
Molecules at z=0.89: A 4-mm-rest-frame absorption line survey toward PKS 1830-211
S. Muller, A. Beelen, M. Guélin +6
We present the results of a 7 mm spectral survey of molecular absorption lines originating in the disk of a z=0.89 spiral galaxy located in front of the quasar PKS 1830-211. [...]…
An Observational Determination of the Proton to Electron Mass Ratio in the Early Universe
Rodger I. Thompson, Jill Bechtold, John H. Black +6
In an effort to resolve the discrepancy between two measurements of the fundamental constant mu, the proton to electron mass ratio, at early times in the universe we reanalyze the…