Results 41 to 50 of about 441,928 (76)

Nova-like variables [PDF]

, 1993
On grounds of different observable characteristics five classes of nova-like objects are distinguished: the UX Ursae Majoris stars, the antidwarf novae, the DQ Herculis stars, the AM Herculis stars, and the AM Canum Venaticorum stars.
Ladous, Constanze
core  

Radial-velocity measurements of subdwarf B stars [PDF]

, 2011
Subdwarf B (sdB) stars are hot, subluminous stars which are thought to be core-helium burning with thin hydrogen envelopes. The mechanism by which these stars lose their envelopes has been controversial, but it has been argued that binary star ...
Copperwheat, CM, Maxted, P. F. L., Morales-Rueda, L., Morales-Rueda, L, Heber, U, L. Morales-Rueda, U. Heber, Copperwheat, C. M., Heber, U., C. M. Copperwheat, T. R. Marsh, Marsh, TR, Maxted, PFL, Marsh, T. R., P. F. L. Maxted   +14 more
core   +1 more source

An Analysis of Cataclysmic Variable DQ Herculis

, 2018
The old nova DQ Herculis is a cataclysmic variable with an orbital period of 4.65 hours and a spin period of 71 seconds. We used light curve data obtained from members of the Center for Backyard Astrophysics to make O-C diagrams and to update the orbital
Wallgren, John
core  

Misaligned spin and orbital axes cause the anomalous precession of DI Herculis

, 2009
The orbits of binary stars precess as a result of general relativistic effects, forces arising from the asphericity of the stars, and forces from additional stars or planets in the system.
Winn, Joshua N., Snellen, Ignas A. G., Simon Albrecht, Sabine Reffert, Snellen, Ignas A.G., Ignas A. G. Snellen, Reffert, Sabine, Albrecht, Simon H., Winn, Joshua Nathan, Albrecht, Simon, Joshua N. Winn   +10 more
core   +1 more source

Equilibria and oscillations of magnetised neutron stars

, 2010
We investigate equilibrium configurations and oscillation spectra of neutron stars,modelled as rotating magnetised fluid bodies in Newtonian gravity. We also explorethe idea that these model neutron stars could have dynamics analogous to rigid-bodyfree ...
Lander, Samuel Kenneth
core   +1 more source

RR Lyrae stars in the GCVS observed by the Qatar Exoplanet Survey [PDF]

, 2015
This publication was made possible by NPRP grant # X-019-1-006 from the Qatar National Research Fund (a member of Qatar Foundation). AAF is grateful to DGAPA-UNAM for grant number IN104612.We used the light curve archive of the Qatar Exoplanet Survey to ...
Bramich, Daniel Martyn, Cameron, Andrew Collier, Arellano Ferro, A., Horne, Keith Douglas, West, R. G., Alsubai, Khalid Abdulla T, Pollacco, D., Parley, Neil   +7 more
core   +1 more source

Time-resolved spectroscopy of the AM Herculis-type binary systems QQ VUL and EF ERI

, 1998
Cataclysmic variable stars (CVs) are interacting binary systems. One of the stars (referred to as the primary) is a white dwarf, the other (referred to as the secondary) is usually a late main sequence star such as a red dwarf.
Blakelock, Carolyn J.
core  

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

Magnetic fields in A stars besides Ap stars

, 2014
I review ongoing efforts to understand the incidence of magnetism in intermediate-mass stars that are different from the magnetic Ap stars. This includes the search for magnetic fields in chemically peculiar stars of the Am and HgMn types as well as in ...
Kochukhov, Oleg,
core  

MAGELLANIC CLOUDS. XII. OBSERVATIONS OF A NOVA IN THE SMALL CLOUD. [PDF]

Proc Natl Acad Sci U S A, 1954
Smith HJ.
europepmc   +1 more source