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- Goddard Space Flight CenterUS262 papers
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7 papers · 1 filter
Variability of Disk Emission in Pre-Main Sequence and Related Stars. I. HD 31648 and HD 163296 - Isolated Herbig Ae Stars Driving Herbig-Haro Flows
M. L. Sitko, W. J. Carpenter, R. L. Kimes +13
Infrared photometry and spectroscopy covering a time span of a quarter century are presented for HD 31648 (MWC 480) and HD 163296 (MWC 275). Both are isolated Herbig Ae stars that…
X-Atlas: An Online Archive of Chandra's Stellar High Energy Transmission Gratings Observations
Owen W. Westbrook, Nancy Remage Evans, Scott J. Wolk +6
The high-resolution X-ray spectroscopy made possible by the 1999 deployment of the Chandra X-ray Observatory has revolutionized our understanding of stellar X-ray emission. Many pu…
Phase-dependent X-ray observations of the beta Lyrae system: No eclipse in the soft band
R. Ignace, L. M. Oskinova, W. L. Waldron +2
We report on observations of the eclipsing and interacting binary beta Lyrae from the Suzaku X-ray telescope. This system involves an early B star embedded in an optically and geom…
X-ray Emission from Magnetically Torqued Disks of Oe/Be Stars
Q. Li, J. P. Cassinelli, J. C. Brown +2
We focus attention on the Oe/Be stars to test the concept that the disks of these stars form by magnetic channeling of wind material toward the equator. Calculations are made of th…
High-resolution polarimetry of Parsamian 21: revealing the structure of an edge-on FU Ori disc
Á. Kóspál, P. Ábrahám, D. Apai +6
We present the first high spatial resolution near-infrared direct and polarimetric observations of Parsamian 21, obtained with the VLT/NACO instrument. We complemented these measur…
An Extensive Collection of Stellar Wind X-ray Source Region Emission Line Parameters,Temperatures, Velocities, and Their Radial Distributions as Obtained from Chandra Observations of 17 OB Stars
Wayne L. Waldron, Joseph P. Cassinelli
Chandra high energy resolution observations have now been obtained from numerous non-peculiar O and early B stars. The observed X-ray emission line properties differ from pre-launc…