dorsal/arxiv
View SchemaScreened thermonuclear reactions and predictive stellar evolution of detached double-lined eclipsing binaries
| Authors | Theodore Liolios, Theocharis Kosmas |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0505020 |
| URL | https://arxiv.org/abs/nucl-th/0505020 |
| DOI | 10.1103/PhysRevC.72.025803 |
| Journal | Phys.Rev.C72:025803,2005 |
Abstract
The low energy fusion cross sections of charged-particle nuclear reactions (and the respective reaction rates) in stellar plasmas are enhanced due to plasma screening effects. We study the impact of those effects on predictive stellar evolution simulations for detached double-lined eclipsing binaries. We follow the evolution of binary systems (pre-main sequence or main sequence stars) with precisely determined radii and masses from 1.1Mo to 23Mo (from their birth until their present state). The results indicate that all the discrepancies between the screened and unscreened models (in terms of luminosity, stellar radius, and effective temperature) are within the observational uncertainties. Moreover, no nucleosynthetic or compositional variation was found due to screening corrections. Therefore all thermonuclear screening effects on the charged-particle nuclear reactions that occur in the binary stars considered in this work (from their birth until their present state) can be totally disregarded. In other words, all relevant charged-particle nuclear reactions can be safely assumed to take place in a vacuum, thus simplifying and accelerating the simulation processes.
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"abstract": "The low energy fusion cross sections of charged-particle nuclear reactions\n(and the respective reaction rates) in stellar plasmas are enhanced due to\nplasma screening effects. We study the impact of those effects on predictive\nstellar evolution simulations for detached double-lined eclipsing binaries. We\nfollow the evolution of binary systems (pre-main sequence or main sequence\nstars) with precisely determined radii and masses from 1.1Mo to 23Mo (from\ntheir birth until their present state). The results indicate that all the\ndiscrepancies between the screened and unscreened models (in terms of\nluminosity, stellar radius, and effective temperature) are within the\nobservational uncertainties. Moreover, no nucleosynthetic or compositional\nvariation was found due to screening corrections. Therefore all thermonuclear\nscreening effects on the charged-particle nuclear reactions that occur in the\nbinary stars considered in this work (from their birth until their present\nstate) can be totally disregarded. In other words, all relevant\ncharged-particle nuclear reactions can be safely assumed to take place in a\nvacuum, thus simplifying and accelerating the simulation processes.",
"arxiv_id": "nucl-th/0505020",
"authors": [
"Theodore Liolios",
"Theocharis Kosmas"
],
"categories": [
"nucl-th",
"astro-ph"
],
"doi": "10.1103/PhysRevC.72.025803",
"journal_ref": "Phys.Rev.C72:025803,2005",
"title": "Screened thermonuclear reactions and predictive stellar evolution of detached double-lined eclipsing binaries",
"url": "https://arxiv.org/abs/nucl-th/0505020"
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