Results 71 to 80 of about 4,939 (124)

Low-dimensional chaos in RR Lyrae models

, 2013
The recent precise photometric observations and successes of the modelling efforts transformed our picture of the pulsation of RR Lyrae stars. The discovery of additional frequencies and the period doubling phenomenon revealed that a significant ...
Kolláth, Z., Molnár, L., Plachy, E.
core   +1 more source

Optical vortices with starlight: Implications for ground-based stellar coronagraphy

, 2008
Using an l = 1 blazed fork-hologram at the focal plane of the Asiago 122 cm telescope, we obtained optical vortices from the stellar system Rasalgethi (alpha Herculis) and from the single star Arcturus (alpha Bootis).
A. Bianchini, Allen, Barbieri, Bazhenov, Beijersbergen, Bekshaev, C. Barbieri, Clifford, Coullet, F. Tamburini, Fried, G. Anzolin, G. Umbriaco, Grier, Halbwachs, Harwit, Jenkins, King, Law, Law, Leach, Mawet, McAlister, Molina-Terriza, Nye, Oemrawsingh, Padgett, Shvedov, Swartzlander, Swartzlander, Swartzlander, Swartzlander, Tamburini, Vaziri   +33 more
core   +1 more source

Study of the solar corona using radio and space observations [PDF]

The physics of coronal transients, the characteristics of radiation and accelerated particles at the time of flares, and the density/temperature structure of the transition region and corona and the coronal magnetic field are ...
Dulk, G. A.
core   +1 more source

The Double Contact Nature of TT Herculis

, 2014
We present new radial velocities and photometry of the short-period Algol TT Herculis. Previous attempts to model the light curves of the system have met with limited success, primarily because of the lack of a reliable mass ratio.
Nelson, Robert H., Terrell, Dirk
core   +1 more source

Activity and magnetic fields on stars from radio observations [PDF]

Radio observations explain certain kinds of stellar activity and reliable estimates of magnetic field strengths are derived for the radio emitting regions.
Dulk, G. A.
core   +1 more source

Laboratory analogue of a supersonic accretion column in a binary star system. [PDF]

Nat Commun, 2016
Cross JE, Gregori G, Foster JM, Graham P, Bonnet-Bidaud JM, Busschaert C, Charpentier N, Danson CN, Doyle HW, Drake RP, Fyrth J, Gumbrell ET, Koenig M, Krauland C, Kuranz CC, Loupias B, Michaut C, Mouchet M, Patankar S, Skidmore J, Spindloe C, Tubman ER, Woolsey N, Yurchak R, Falize É.   +24 more
europepmc   +1 more source

Formation of high-field magnetic white dwarfs from common envelopes. [PDF]

Proc Natl Acad Sci U S A, 2011
Nordhaus J, Wellons S, Spiegel DS, Metzger BD, Blackman EG.   +4 more
europepmc   +1 more source

OSO-8 X-ray observations of AM Herculis [PDF]

Hard X-ray observations of the binary system AM Her were coincident with soft X-ray and ground-based optical measurements. In the 2-60 KeV band, variability was detected with an eclipse during phases 0.5 to 0.7 with respect to the 0.
Boldt, E., Holt, S. S., Lampton, M., Serlemitsos, P. J., Swank, J. H.   +4 more
core   +1 more source

On the Material Ejected from Novae. [PDF]

Proc Natl Acad Sci U S A, 1942
Payne-Gaposchkin C, Gaposchkin S.
europepmc   +1 more source

Notes on Binary Stars: V. The Determination by Least-Squares of the Elements of Spectroscopic Binaries. [PDF]

Proc Natl Acad Sci U S A, 1941
Sterne TE.
europepmc   +1 more source