Diane B. Paulson

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We report the detection of a planetary companion in orbit around the primary star of the binary system γ Cephei. High precision radial velocity measurements using 4 independent data sets spanning the time interval 1981–2002 reveal long-lived residual radial velocity variations (after subtracting the contribution due to the stellar companion) that are(More)
OBJECTIVE To determine systemic and mucosal antibody responses in calves to Pasteurella haemolytica 1:A and to 2 major outer membrane proteins (OMP) and 1 major iron-regulated OMP of P haemolytica 1:A. ANIMALS 23 crossbred calves. PROCEDURE 2 experiments were performed in the first experiment, 6 calves were vaccinated and challenge exposed intranasally(More)
Background: We evaluated efficacy and associated adhesion formation of an innovative mesh fixation device versus the helical tack device and analyzed two implantation techniques. Methods: Six purpose-bred female hounds were evaluated in this 90-day survival study. Six 4-cm round patches of 1-mm thick DualMesh were fixed to the abdominal wall with either 10(More)
We continue our series of papers on open cluster distances with a critical assessment of the accuracy of mainsequence fitting using isochrones that employ empirical corrections to the color-temperature relations. We use four nearby open clusters withmulticolor photometry and accurate metallicities and present a newmetallicity for Praesepe (1⁄2Fe/H 1⁄4 þ0:11(More)
We have been using the Keck I High Resolution Spectrograph (HIRES) to search for planetary companions in the Hyades cluster. We selected four stars from this sample which showed significant radial velocity variability on short timescales to search for short-period planetary companions. The radial velocities of these four stars were monitored regularly with(More)
Hubble Space Telescope (HST ) observations of the nearby (3.22 pc), K2 V star ǫ Eridani have been combined with ground-based astrometric and radial velocity data to determine the mass of its known companion. We model the astrometric and radial velocity measurements simultaneously to obtain the parallax, proper motion, perturbation period, perturbation(More)
We report the first detection of a planetary-mass companion to a star using the High Resolution Spectrograph (HRS) of the Hobby-Eberly Telescope (HET). The HET-HRS now gives routine radial velocity precision of 2-3m s for high SNR observations of quiescent stars. The planetary-mass companion to the metal-rich K0V star HD37605 has an orbital period of 54.23(More)
We present measurements of the neutron-capture elements Rb and Pb in five giant stars of the globular cluster NGC 6752 and Pb measurements in four giants of the globular cluster M 13. The abundances were derived by comparing synthetic spectra with high resolution, high signal-to-noise ratio spectra obtained using HDS on the Subaru telescope and MIKE on the(More)
We discuss our high precision radial velocity results of a sample of 90 M dwarfs observed with the Hobby-Eberly Telescope and the Harlan J. Smith 2.7 m Telescope at McDonald Observatory, as well as the ESO VLT and the Keck I telescopes, within the context of the overall frequency of Jupiter-mass planetary companions to main sequence stars. None of the stars(More)
Using classical model atmospheres and an LTE analysis, Mg isotope ratios Mg:Mg:Mg are measured in 32 Hyades dwarfs covering 4000K ≤ Teff ≤ 5000K. We find no significant trend in any isotope ratio versus Teff and the mean isotope ratio is in excellent agreement with the solar value. We determine stellar parameters and Fe abundances for 56 Hyades dwarfs(More)