Publications (10)
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 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 Ã region, especially well s…
Correlated X-ray and optical variability in the O-type supergiant zeta Puppis
Joy S. Nichols, Yael Naze, David P. Huenemoerder +11
Analysis of the recent long exposure Chandra X-ray observation of the early-type O star zeta Pup shows clear variability with a period previously reported in optical photometric st…
Chandra Early-Type Galaxy Atlas
Dong-Woo Kim, Craig Anderson, Douglas Burke +11
The hot ISM in early type galaxies (ETGs) plays a crucial role in understanding their formation and evolution. The structural features of the hot gas identified by Chandra observat…
The Chandra Source Catalog
Ian N. Evans, Francis A. Primini, Kenny J. Glotfelty +36
The Chandra Source Catalog (CSC) is a general purpose virtual X-ray astrophysics facility that provides access to a carefully selected set of generally useful quantities for indivi…
An XMM-Newton Early-type Galaxy Atlas
Nazma Islam, Dong-Woo Kim, Kenneth Lin +9
The distribution of hot interstellar medium in early-type galaxies bears the imprint of the various astrophysical processes it underwent during its evolution. The X-ray observation…
The Chandra Source Catalog Release 2 Series
Ian N. Evans, Janet D. Evans, J. Rafael MartÃnez-Galarza +17
The Chandra Source Catalog (CSC) is a virtual X-ray astrophysics facility that enables both detailed individual source studies and statistical studies of large samples of X-ray sou…
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…
Statistical Characterization of the Chandra Source Catalog
Francis A. Primini, John C. Houck, John E. Davis +36
The first release of the Chandra Source Catalog (CSC) contains ~95,000 X-ray sources in a total area of ~0.75% of the entire sky, using data from ~3,900 separate ACIS observations…
Temperature Profiles of Hot Gas In Early Type Galaxies
Dong-Woo Kim, Liam Traynor, Alessandro Paggi +12
Using the data products of the Chandra Galaxy Atlas (Kim et al. 2019a), we have investigated the radial profiles of the hot gas temperature in 60 early type galaxies. Considering t…