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- Goddard Space Flight CenterUS158 papers
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- Center for Astrophysics Harvard & SmithsonianUS129 papers
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19 papers · 1 filter
Determining the Physical Properties of the B Stars II. Calibration of Synthetic Photometry
E. L. Fitzpatrick, D. Massa
We present a new calibration of optical (UBV, Stromgren, uvby-beta, and Geneva) and near IR (Johnson RIJHK and 2MASS) photometry for B and early A stars derived from Kurucz (1991)…
Evolution of the Solar Activity over Time and Effects on Planetary Atmospheres: I. High-energy Irradiances (1-1700 A)
I. Ribas, E. F. Guinan, M. Guedel +1
We report on the results of the Sun in Time multi-wavelength program (X-rays to the UV) of solar analogs with ages covering ~0.1-7 Gyr. The chief science goals are to study the sol…
Far-ultraviolet Spectroscopy of Magnetic Cataclysmic Variables
S. Araujo-Betancor, B. T. Gaensicke, K. S. Long +4
We have obtained HST/STIS data for a total of eleven polars as part of a program aimed to compile a homogeneous database of high-quality far-ultraviolet (FUV) spectra for a large n…
Peano High Impedance Surfaces
John McVay, Ahmad Hoorfar, Nader Engheta
Following our previous work on metamaterial high-impedance surfaces made of Hilbert curve inclusions, here we theoretically explore the performance of the high-impedance surfaces m…
Intuitionistic computability logic
Giorgi Japaridze
Computability logic (CL) is a systematic formal theory of computational tasks and resources, which, in a sense, can be seen as a semantics-based alternative to (the syntactically i…
An HST STIS Observation of VW Hydri at the Exact FUV Onset of an Outburst
E. M. Sion, F. H. Cheng, B. T. Gaensicke +1
We present an analysis of HST STIS data of VW Hyi acquired ~ 14 days after a superoutburst. At the time of the observation the system appears to be going into outburst with the lon…