4 papers · 1 filter
The Hanle Effect as a Magnetic Diagnostic
Richard Ignace
The physics of the Hanle effect is briefly reviewed, and its application as a diagnostic of hot star magnetic fields is described. Emphasis is given to the practicalities of using…
SED Signatures of Jovian Planets Around White Dwarf Stars
R. Ignace
The problem of detecting Jovian-sized planets orbiting White Dwarf stars is considered. Significant IR excesses result from warm Jupiters orbiting a White Dwarf of $T_{\rm eff}=100…
Determination of Magnetic Fields in the Winds from Hot Stars Using the Hanle Effect
Joseph P. Cassinelli, Kenneth H. Nordsieck, Richard Ignace
Resonance lines that are sensitive to the Hanle effect are prominent in the UV spectra of early-type stars. To understand the differences from the solar application of the Hanle ef…
Microlensing of Circumstellar Envelopes I. Simplified considerations for diagnosing radial and azimuthal flow
R. Ignace, M. A. Hendry
This paper presents first results on the line profile shapes from a circumstellar envelope in bulk motion as modified by a microlensing event. Only geometrically and optically thin…