Hydrodynamic Modeling of Mass Loss from Cataclysmic Variable Secondaries
نویسندگان
چکیده
منابع مشابه
On the late spectral types of cataclysmic variable secondaries
We investigate why the spectral type of most cataclysmic variable (CV) secondaries is significantly later than that of a ZAMS star with the same mean density. Using improved stellar input physics, tested against observations of low–mass stars at the bottom of the main sequence, we calculate the secular evolution of CVs with low–mass donors. We consider sequences with different mass transfer rat...
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The present-day formation of cataclysmic variables (CVs) with brown dwarf (BD) secondaries (0.013 M⊙ ≤ Ms ≤ 0.075 M⊙) is investigated using a population synthesis technique. Results from the latest, detailed models for BDs have been incorporated into the population synthesis code. The present-day orbital period distribution of zero-age CVs (ZACVs) that form with BD secondaries is calculated. Fo...
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We present VTL/ISAAC infrared spectroscopy of a sample of short orbital period cataclysmic variables which are candidates for harboring substellar companions. We have detected the K i and Na i absorption lines of the companion star in VY Aqr. The overall spectral distribution in this system is best fit with a M9.5 type dwarf spectra, implying a distance of 100 ± 10 pc. VY Aqr seems to fall far ...
متن کاملmodeling loss data by phase-type distribution
بیمه گران همیشه بابت خسارات بیمه نامه های تحت پوشش خود نگران بوده و روش هایی را جستجو می کنند که بتوانند داده های خسارات گذشته را با هدف اتخاذ یک تصمیم بهینه مدل بندی نمایند. در این پژوهش توزیع های فیزتایپ در مدل بندی داده های خسارات معرفی شده که شامل استنباط آماری مربوطه و استفاده از الگوریتم em در برآورد پارامترهای توزیع است. در پایان امکان استفاده از این توزیع در مدل بندی داده های گروه بندی ...
Hydrodynamic simulations of irradiated secondaries in dwarf novae
Context. Secondary stars in dwarf novae are strongly irradiated during outbursts. It has been argued that this could result in an enhancement of the mass transfer rate even though the L1 region is shadowed from the primary irradiation by the accretion disc. Previous investigations of the possibility of a circulation flow transporting heat from hot regions to L1 gave opposite answers. Aims. We i...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1980
ISSN: 0252-9211
DOI: 10.1017/s0252921100082178