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- The University of Texas at AustinUS19 papers
- University of Wisconsin–MadisonUS14 papers
- Space Telescope Science InstituteUS12 papers
- California Institute of TechnologyUS10 papers
- European Southern ObservatoryCL10 papers
- Lawrence Berkeley National LaboratoryUS10 papers
- Northwestern UniversityUS10 papers
- Stockholm UniversitySE10 papers
- University of California, BerkeleyUS10 papers
- Vanderbilt UniversityUS10 papers
- Centre National de la Recherche ScientifiqueFR9 papers
- Laboratoire de Physique Nucléaire et de Hautes ÉnergiesFR9 papers
18 papers · 1 filter
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
Susan E. Thompson, M. H. van Kerkwijk, J. C. Clemens
We present optical time series spectroscopy of the pulsating white dwarf star G29-38 taken at the Very Large Telescope (VLT). By measuring the variations in brightness, Doppler shi…
Interpretation of the Cosmological Metric
Richard J. Cook, M. Shane Burns
The cosmological Robertson-Walker metric of general relativity is often said to have the consequences that (1) the recessional velocity of a galaxy at proper distance ob…
Quantitative comparison between Type Ia supernova spectra at low and high redshifts: A case study
G. Garavini, G. Folatelli, S. Nobili +44
We develop a method to measure the strength of the absorption features in Type Ia supernova (SN Ia) spectra and use it to make a quantitative comparison between the spectra of Type…
Discovery of Photospheric Calcium Line Strength Variations in the DAZd White Dwarf G29-38
Ted von Hippel, Susan E. Thompson
Metals in the photospheres of white dwarfs with Teff between 12,000 and 25,000 K should gravitationally settle out of these atmospheres in 1-2 weeks. Temporal variations in the lin…
Mode Identification from Combination Frequency Amplitudes in ZZ Ceti Stars
Celeste M. Yeates, J. Christopher Clemens, S. E. Thompson +1
The lightcurves of variable DA stars are usually multi-periodic and non-sinusoidal, so that their Fourier transforms show peaks at eigenfrequencies of the pulsation modes and at su…
Spectra of High-Redshift Type Ia Supernovae and a Comparison with their Low-Redshift Counterparts
I. M. Hook, D. A. Howell, G. Aldering +32
We present spectra for 14 high-redshift (0.17 < z < 0.83) supernovae, which were discovered by the Supernova Cosmology Project as part of a campaign to measure cosmological paramet…