Results 31 to 40 of about 9,121 (304)

The Formation of Close Binary Stars [PDF]

open access: yesSymposium - International Astronomical Union, 2001
I review the possible formation mechanisms of close binary stars. The formation of close binary systems is problematic in that there is no theory that does not encounter significant difficulties or unknowns. Fission does not appear to occur in stars.
openaire   +1 more source

Post-common envelope binaries from SDSS. XVI, Long orbital period systems and the energy budget of common envelope evolution [PDF]

open access: yes, 2012
Virtually all close compact binary stars are formed through common envelope (CE) evolution. It is generally accepted that during this crucial evolutionary phase a fraction of the orbital energy is used to expel the envelope.
Schwope, A. D.   +12 more
core   +1 more source

Tidally trapped pulsations in a close binary star system discovered by TESS [PDF]

open access: yes, 2020
It has long been suspected that tidal forces in close binary stars could modify the orientation of the pulsation axis of the constituent stars. Such stars have been searched for, but until now never detected.
Fuller, J.   +18 more
core   +1 more source

The EBLM Project I-Physical and orbital parameters, including spin-orbit angles, of two low-mass eclipsing binaries on opposite sides of the Brown Dwarf limit [PDF]

open access: yes, 2012
peer reviewedThis paper introduces a series of papers aiming to study the dozens of low mass eclipsing binaries (EBLM), with F, G, K primaries, that have been discovered in the course of the WASP survey.
Collier Cameron, Andrew   +90 more
core   +1 more source

The GALAH survey: multiple stars and our Galaxy [PDF]

open access: yes, 2020
Context. Binary stellar systems form a large fraction of the Galaxy’s stars. They are useful as laboratories for studying the physical processes taking place within stars, and must be correctly taken into account when observations of stars are used to ...
Kos, J.,   +110 more
core   +1 more source

Measurable Residual Disease Monitoring During Treatment for Pediatric Acute Myeloid Leukemia in First Relapse

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Survival after relapse in pediatric acute myeloid leukemia (AML) remains poor, highlighting the critical importance of identifying prognostic factors to guide optimal relapse management. Methods We investigated the prognostic impact of multiparameter flow cytometry (MFC) measurable residual disease (MRD) in 188 patients with first ...
Camilla Poulsen   +21 more
wiley   +1 more source

The period distribution of close binary systems [PDF]

open access: yes, 1979
The analysis of the period distribution of eclipsing and spectroscopic binary systems shows the presence of some secondary maxima, which cannot depend on selection effects. These secondary maxima are mainly due to late type stars, as can be seen from the
Farinella P.   +3 more
core  

On Hierarchical Composite Endpoints in Pediatric Cancer Supportive Care: Illustrative Examples From Two Multi‐Center Phase‐III Randomized Clinical Trials

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric supportive care clinical trials often involve multiple clinically important outcomes, complicating trial interpretation. Hierarchical composite endpoints (HCEs) provide a framework to integrate key outcomes according to clinical importance.
Willem H. Collier   +11 more
wiley   +1 more source

New periodic variable stars coincident with ROSAT sources discovered using SuperWASP [PDF]

open access: yes, 2007
We present optical lightcurves of 428 periodic variable stars coincident with ROSAT X-ray sources, detected using the first run of the SuperWASP photometric survey. Only 68 of these were previously recognised as periodic variables.
West, Richard G.   +75 more
core   +1 more source

Short-period Heartbeat Binaries from TESS Full-frame Images

open access: yesThe Astrophysical Journal Supplement Series
We identify 240 short-period ( P ≲ 10 days) binary systems in Transiting Exoplanet Survey Satellite data, 180 of which are heartbeat binaries. The sample is mostly a mix of A- and B-type stars and primarily includes eclipsing systems, where over 30% of ...
Siddhant Solanki   +11 more
doaj   +1 more source

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