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The Mass-Temperature Relation for B and Early A Stars Based on IUE Spectra of Detached Eclipsing Binaries
Nancy Remage Evans, Mckenzie G. Ferrari, Joanna Kuraszkiewicz +4
Ultraviolet spectra were taken of 25 Detached Eclipsing Binaries (DEBs) with spectral types O, B, and early A with the International Ultraviolet Explorer (IUE) satellite in the 115…
Survey of X-rays from Massive Stars Observed at High Spectral Resolution with Chandra
Pragati Pradhan, David P. Huenemoerder, Richard Ignace +2
Identifying trends between observational data and the range of physical parameters of massive stars is a critical step to the still-elusive full understanding of the source, struct…
A Deep Exposure in High Resolution X-Rays Reveals the Hottest Plasma in the Puppis Wind
David P. Huenemoerder, Richard Ignace, Nathan A. Miller +9
We have obtained a very deep exposure (813 ks) of Puppis (O4 supergiant) with the Chandra/HETG Spectrometer. Here we report on analysis of the 1-9 Å region, especially well su…
Winds of Massive Stars: High Resolution X-ray Spectra of Stars in NGC 3603
David P. Huenemoerder, Norbert S. Schulz, Joy S. Nichols
The cluster NGC 3603 hosts some of the most massive stars in the Galaxy. With a modest 50 ks exposure with the Chandra High Energy Grating Spectrometer, we have resolved emission l…
Binary Properties from Cepheid Radial Velocities (CRaV)
Nancy Remage Evans, Leonid Berdnikov, Jennifer Lauer +6
We have examined high accuracy radial velocities of Cepheids to determine the binary frequency. The data are largely from the CORAVEL spectrophotometer and the Moscow version, with…
A Coordinated X-ray and Optical Campaign of the Nearest Massive Eclipsing Binary, delta Orionis Aa: III. Analysis of Optical Photometric MOST and Spectroscopic (Ground Based) Variations
Herbert Pablo, Noel D. Richardson, Anthony F. J. Moffat +44
We report on both high-precision photometry from the MOST space telescope and ground-based spectroscopy of the triple system delta Ori A consisting of a binary O9.5II+early-B (Aa1…