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Echelle spectra of the double-lined spectroscopic binary HD 204827 were obtained on five nights, at a resolving power R ¼ 38;000 and with a S/N ¼ 750 near 6000 8 in the final, combined spectrum. The stars show E(B À V) ¼ 1:11 and spectral types near O9.5 V and B0.5 III. A catalog is presented of 380 diffuse interstellar bands (DIBs) measured between 3900(More)
1. Stroke-prone spontaneously hypertensive rats (SHRSP) fed a high salt diet rapidly develop proteinuria, a marker of renal damage. We have recently shown that supplementing the diet of these rats with pure omega-3 fatty acids can inhibit the development of proteinuria. The aim of the present study was to examine the underlying renal pathology and to see(More)
We present the results of exploratory HST observations to detect the emission lines of ions in the β Pictoris disk with the spectrograph slit placed off the star. Possible emission lines from Fe ii have been detected at ∼ 10 −14 erg cm −2 s −1 at 0.5 from β Pictoris, which would suggest a total Fe ii density of > ∼ 2 · 10 −2 cm −3 at 10 AU. This detection(More)
The proto-planetary Red Rectangle nebula is powered by HD 44179, a spectroscopic binary (P = 318 d), in which a luminous post-AGB component is the primary source of both luminosity and current mass loss. Here, we present the results of a seven-year, eight-orbit spectroscopic monitoring program of HD 44179, designed to uncover new information about the(More)
The ionization rate of interstellar material by cosmic rays has been a major source of controversy, with different estimates varying by three orders of magnitude. Observational constraints of this rate have all depended on analyzing the chemistry of various molecules that are produced following cosmic-ray ionization, and in many cases these analyses contain(More)
We have investigated the correlations between the equivalent widths of 21 selected diffuse interstellar bands (DIBs) and the corresponding interstellar column densities N(C 2), N(CN), and N(CH), toward 53 stars with color excesses 0:11 EðBÀV Þ 1:99. The observational data were derived primarily from echelle spectra acquired at R ¼ 38; 000 as part of our(More)
GHRS high resolution spectra of β Pictoris were obtained to study the stable gas around this star. Several elements are detected and their abundances measured. Upper limits to the abundances of others are also measured. The data permit improved chemical analysis of the stable gas around β Picto-ris, and yield new and more accurate estimates of the radiation(More)
New optical spectra of Ca ii and Na i toward HD 72127AB provide additional evidence for both spatial and temporal variations in the complex interstellar absorption along the two sight lines; archival UV spectra yield information on the abundances, depletions, and physical conditions in the gas toward HD 72127A. Similarities in the strengths of various(More)
As part of an extensive survey of diffuse interstellar bands (DIBs), we have obtained optical spectra of the moderately reddened B5V star HD 62542, which is known to have an unusual UV extinction curve of the type usually identified with dark clouds. The typically strongest of the commonly catalogued DIBs covered by the spectra — those at 5780, 5797, 6270,(More)
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