Results 121 to 130 of about 125,367 (265)

Dwarf Nova Oscillations: New Results

open access: yes, 2001
New and archived observations of VW Hyi in outburst show the occasional presence of optical Dwarf Nova Oscillations (DNOs) over the range of 18 - 40 s. There is a rapid increase in period near the end of outburst, at the same time that the EUV falls almost to zero, which we attribute to propellering. The DNOs return to a shorter period after this phase,
Warner, Brian, Woudt, Patrick
openaire   +2 more sources

On the of classification of BL Her subtype of the Type II Cepheids

open access: yesEPJ Web of Conferences, 2015
The initial reason for studying Type II Cepheids (CWB) was for period changes, binarity or any other signs of change other than the pulsation. The GCVS contained 71 objects of this kind in 2012 when the wok started, and that list is now extended to 100 ...
Jurkovic Monika I.
doaj   +1 more source

Dwarf novae in the Hamburg quasar survey: rarer than expected [PDF]

open access: bronze, 2006
A. Aungwerojwit   +14 more
openalex   +1 more source

The EUVE Observations of Dwarf Novae [PDF]

open access: yesInternational Astronomical Union Colloquium, 1996
In the standard theory of dwarf novae in outburst, the boundary layer region between the inner edge of the accretion disk and the white dwarf surface radiates primarily in the extreme ultraviolet. Using EUVE, observers have been able to obtain spectra with sufficient spectral resolution to characterize accurately the emission from several dwarf novae ...
openaire   +1 more source

A Demarcation Criterion for Hydrogen Burning of Millinovae

open access: yesThe Astrophysical Journal
Millinovae are a new class of transient supersoft X-ray sources with no clear signature of mass ejection. They show similar triangle shapes of V / I band light curves with 1000 times fainter peaks than typical classical novae. Maccarone et al.
Izumi Hachisu, Mariko Kato
doaj   +1 more source

"INTER-LONGITUDE ASTRONOMY" (ILA) PROJECT: CURRENT HIGHLIGHTS AND PERSPECTIVES. I. MAGNETIC VS. NON-MAGNETIC INTERACTING BINARY STARS

open access: yesOdessa Astronomical Publications, 2010
We present a review of highlights of our photometric and photo-polarimetric monitoring and mathematical modeling of interacting binary stars of different types classical, asynchronous, intermedi ate polars with 25 timescales corresponding to differ ent ...
I. L. Andronov   +25 more
doaj   +1 more source

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