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A Revised Geometry for the Magnetic Wind of θ¹ Orionis C

Smith, Myron A.; Fullerton, Alex W.

The star θ¹ Orionis C (O6-7 V) is often cited as a hot analog of Bp variables, because its optical and UV line and X-ray continuum fluxes modulate over the magnetic/rotational period. In this circumstance, one expects emission and absorption components of the UV resonance lines to vary as a flattened magnetosphere corotates with the sta…

Lifting the Iron Curtain: Toward an Understanding of the Iron Stars XX Oph and AS 325

Howell, Steve B.; Cool, Richard J.; Peña, Maria +2 more

We present new optical, near-infrared, and archival ultraviolet observations of XX Ophiuchi and AS 325, two proposed ``iron'' stars. These unusual stars have optical spectra dominated by emission lines arising from hydrogen, as well as ionized metals such as iron, chromium, and titanium. Both stars have been classified as ``iron'' stars, and a num…

A Far-Ultraviolet Study of the Old Nova V841 Ophiuchi

Sion, Edward M.; Engle, Scott G.

We have carried out a synthetic spectral analysis of archival International Ultraviolet Explorer spectra of the old nova V841 Oph (Nova Oph 1848) taken 15 years apart. The spectra reveal a rising continuum shortward of 1560 Å, a C IV P Cygni profile indicative of wind outflow associated with disk accretion in one spectrum, a deep Lyα profile, and …

Looking for Discrete UV Absorption Features in the Early-Type Eclipsing Binaries µ¹ Scorpii and AO Cassiopeiae

Sahade, J.; Kondo, Y.; Arias, M. L. +1 more

A search for discrete absorption components in the ultraviolet spectra of the early-type binaries µ¹ Scorpii and AO Cassiopeiae has been undertaken by analyzing material secured with the International Ultraviolet Explorer satellite during an exclusively assigned interval of nearly 50 hr. While the spectra of µ¹ Sc…