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7 papers · 2 filters
Non-Gaussian Isocurvature Perturbations From Goldstone Modes Generated During Inflation
Martin Bucher, Yong Zhu
We investigate non-Gaussian isocurvature perturbations generated by the evolution of Goldstone modes during inflation. If a global symmetry is broken ``before'' inflation, the resu…
The Molecular Interstellar Medium in Ultraluminous Infrared Galaxies
P. M. Solomon, D. Downes, S. J. E. Radford +1
We present CO observations of a large sample of ultraluminous IR galaxies out to z = 0.3. Most of the galaxies are interacting, but not completed mergers. All but one have high CO(…
Neutrino Scattering in a Newly Born Neutron Star
Sanjay Reddy, Madappa Prakash
We calculate neutrino cross sections from neutral current reactions in the dense matter encountered in the evolution of a newly born neutron star. Effects of composition and of str…
Molecular gas and dust around a radio-quiet quasar at redshift 4.7
Alain Omont, Patrick Petitjean, Stephane Guilloteau +3
We report the detection of emission from dust and carbon monoxide in the radio-quiet quasar BR1202--0725 at redshift z=4.7. Maps of these emissions reveal two objects separated by…
Testing cosmological variations of fundamental physical constants by analysis of quasar spectra
D. A. Varshalovich, A. Y. Potekhin, A. V. Ivanchik +2
Contemporary multidimensional cosmological theories predict different variations of fundamental physical constants in course of the cosmological evolution. On the basis of the QSO…
Star-forming galaxies at very high redshifts
Kenneth M. Lanzetta, Amos Yahil, Alberto Fernandez-Soto
Analysis of the deepest available images of the sky, obtained by the Hubble Space Telescope, reveals a large number of candidate high-redshift galaxies. A catalogue of 1,683 object…