Results 41 to 50 of about 2,261,610 (72)

The AM Canum Venaticorum Stars [PDF]

, 2007
IX, 138 p.
openaire  

SDSS J0926+3624 : the shortest period eclipsing binary star [PDF]

, 2010
With orbital periods of the order of tens of minutes or less, the AM Canum Venaticorum stars are ultracompact, hydrogen-deficient binaries with the shortest periods of any binary subclass, and are expected to be among the strongest gravitational wave ...
Roelofs, Gijs H. A., Southworth, J., Littlefair, S., Copperwheat, C.M., Tulloch, S., Steeghs, D., G. Ramsay, P. J. Groot, Gaensicke, B. T., Koester, D., G. Nelemans, Dhillon, V. S., Hakala, P., Roelofs, G., A. J. Drake, Drake, A. J., Marsh, T., T. R. Marsh, Dhillon, V.S., Littlefair, S. P., Marsh, T. R., Groot, P.J., Copperwheat, C., P. Hakala, Koester, Detlev, Dhillon, V., G. Roelofs, V. S. Dhillon, Copperwheat, C. M., Ramsay, G., J. Southworth, Littlefair, S.P., D. Koester, D. Steeghs, C. M. Copperwheat, Nelemans, G., Gänsicke, B.T., S. Tulloch, Marsh, T.R., Drake, A.J., Nelemans, G.A., Groot, P. J., B. T. Gänsicke, S. P. Littlefair   +43 more
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Modeling the Photometric Variability of Alpha$^2$ CVn with a Dynamical Magnetosphere

, 2022
Alpha2 Canum Venaticorum (α 2 CVn) is a strongly magnetic star with peculiar chemical signatures and periodic variability that have been long attributed to the diffusion of magnetic elements through the photosphere, leading to chemical spots across the
McSwain, M. Virginia, Pfeffer, Cameron M.   +1 more
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Non-LTE spectral analysis of the AM CVn system

, 2014
Context. AM Canum Venaticorum stars are close, interacting binary systems with a white dwarf primary surrounded by a helium-dominated accretion disk.
T. Nagel, K. Werner, K. Gehron, T. Rauch
core   +1 more source

Simulated UVEX colors with reddening

, 2010
Item does not contain fulltextThe UV-Excess survey of the northern Galactic plane images a 10°x185° wide band, centred on the Galactic equator using the 2.5-m Isaac Newton Telescope in four bands (U, g, r, HeI 5875) down to ∼21-22mag (∼20 in HeI 5875 ...
Nelemans, G.A., Jonker, P.G., Groot, P.J.   +2 more
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Ca II H and K and H_α emissions in chromospherically active binary-systems (RS Canum Venaticorum and BY Draconis)

, 1994
© 1993. The American Astronomical Society. The INT 2.5 m on the island of La Palma and the 2.2 m telescope at Calar Alto Observatory are operated, respectively, by the Royal Greenwich Observatory at the Spanish Observatorio del Roque de los Muchachos ...
Montes Gutiérrez, David, Fernández Figueroa, María José, Cornide Castro-Piñeiro, Manuel, Castro Rubio, Elisa de   +3 more
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Accretion processes in cataclysmic variable stars: insights from optical transient surveys [PDF]

Cataclysmic variable (CV) stars are binary stars mostly characterised by accretion from a main sequence donor star to a white dwarf star. Multiple CV subclasses exist with varia tions in the nature of the CV, many of which have accretion discs ...
Motsoaledi, Mokhine
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Contemporaneous Imaging Comparisons of the Spotted Giant σ Geminorum Using Interferometric, Spectroscopic, and Photometric Data [PDF]

, 2017
Nearby active stars with relatively rapid rotation and large starspot structures offer the opportunity to compare interferometric, spectroscopic, and photometric imaging techniques.
Harmon, Robert O., Baron, Fabien, Monnier, John D., Hackman, Thomas, Korhonen, Heidi, Weber, Michael, Henry, Gregory W., Strassmeier, Klaus G., Roettenbacher, Rachael M., Schaefer, Gail H., ten Brummelaar, Theo A.   +10 more
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A new sample of super-slowly rotating Ap (ssrAp) stars from the [PDF]

Context. The magnetic chemically peculiar Ap stars exhibit an extreme spread of rotational velocities, the cause of which is not clearly understood. Ap stars with rotation periods of 50 days or longer are know as super-slowly rotating Ap (ssrAp) stars ...
Hümmerich, S., E. Paunzen, Bernhard, K., S. Hümmerich, K. Bernhard, Paunzen, E.   +5 more
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Spectroscopic study of the Stars 12 Vulpeculae and Cu Virgins

, 2015
En este trabajo se presentan los resultados del estudio espectroscópico realizado a la estrella Be 12 Vulpécula y la estrella del tipo alfa^2 Canum Venaticorum CU Virgins.
Ballesteros Casallas, Andrés Camilo
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