Results 51 to 60 of about 2,261,610 (72)

High-Resolution optical observations of Extreme-Ultraviolet-selected active late-type stars [PDF]

, 2002
We present high-resolution optical spectra of EUV-selected late-type stars. We have detected seven new spectroscopic binaries, including a pair of F stars and an RS Canum Venaticorum candidate. Many of the stars in our sample show remarkable H?
Damian J. Christian, Mihalis Mathioudakis   +1 more
core  

Models of AM Canum Venaticorum Star Outbursts [PDF]

Astronomy and Astrophysics, 2012
Context. Outbursting AM CVn stars exhibit outbursts similar to those observed in different types of dwarf novae. Their light-curves combine the characteristic features of SU UMa, ER UMa, Z Cam, and WZ Sge-type systems but also show a variety of properties never observed in dwarf novae.
Jean-Pierre Lasota-Hirszowicz, Jean-Marie Hameury   +1 more
exaly   +4 more sources

The Quiescent Spectrum of the AM Canum Venaticorum Star CP Eridani [PDF]

Astrophysical Journal, 2001
We used the 6.5 m Multiple Mirror Telescope to obtain a spectrum of the AM Canum Venaticorum star CP Eridani in quiescence. The spectrum is dominated by He I emission lines, which are clearly double-peaked with a peak-to-peak separation of ~1900 km s-1.
Gijs Nelemans, Tom Marsh, Paul J. Groot
exaly   +4 more sources

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The AM canum venaticorum stars

Astrophysics and Space Science, 1995
The photometric and spectroscopic properties of the six known AM CVn stars are reviewed. This gives support to the idea that they are helium-transferring double degenerate binaries with orbital periods in the range 1000-3000 s. The photometric variations arise predominantly from the same ‘superhump’ phenomenon that is seen in superoutbursts of the SU ...
openaire   +1 more source

Effects of Irradiation on the Secondary Star in a Tight Binary System, Exemplified by AM Canum Venaticorum

1997
Aiming at understanding the nature of the secondary of AM CVn, we investigate the effects of irradiation in a tight binary system. Observations of the spectrum place an upper boundary on the temperature of the secondary, while the observed light modulations limit the temperature difference between the illuminated and the unilluminated side.
openaire   +1 more source

HD 345723: RS Canum Venaticorum Variable Star Detected With TESS Data

Research Notes of the AAS, 2022
Ivo Peretto
exaly  

Doppler Imaging of Spotted Stars - Application to the RS Canum Venaticorum Star HR 1099

Publications of the Astronomical Society of the Pacific, 1983
S S Vogt
exaly  

Spot Activity of the RS Canum Venaticorum Star σ Geminorum

Astronomy and Astrophysics, 2014
Lars Thomas Hackman, Gregory W. Henry, J Lehtinen   +2 more
exaly  

Prominence Activation, Optical Flare, and Post-Flare Loops on the RS Canum Venaticorum Star SZ Piscium

Monthly Notices of the Royal Astronomical Society, 2019
Tinggui Wang, Dongtao Cao, Volker Perdelwitz   +2 more
exaly  

New X-Ray Observations of IQ Aurigae and α2 Canum Venaticorum - Probing the Magnetically Channeled Wind Shock Model in A0p Stars

Astronomy and Astrophysics, 2011
Jürgen H M M Schmitt
exaly