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On the effect of turbulent anisotropy on pulsation stability of stars

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Title: On the effect of turbulent anisotropy on pulsation stability of stars
Authors: Zhang, C., Deng, L., Xiong, D. R.
Source: Res. Astron. Astrophys., 17, 29 (2017)
Publication Year: 2018
Collection: Astrophysics
Subject Terms: Astrophysics - Solar and Stellar Astrophysics
More Details: Within the framework of non-local time-dependent stellar convection theory, we study in detail the effect of turbulent anisotropy on stellar pulsation stability. The results show that anisotropy has no substantial influence on pulsation stability of g modes and low-order (radial order $n_\mathrm{r}<5$) p modes. The effect of turbulent anisotropy increases as the radial order increases. When turbulent anisotropy is neglected, most of high-order ($n_\mathrm{r}>5$) p modes of all low-temperature stars become unstable. Fortunately, within a wide range of the anisotropic parameter $c_3$, stellar pulsation stability is not sensitive to the specific value of $c_3$. Therefore it is safe to say that calibration errors of the convective parameter $c_3$ do not cause any uncertainty in the calculation of stellar pulsation stability.
Comment: 8 pages, 5 figures, published 2017 March
Document Type: Working Paper
DOI: 10.1088/1674-4527/17/3/29
Access URL: http://arxiv.org/abs/1808.09625
Accession Number: edsarx.1808.09625
Database: arXiv
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  Data: On the effect of turbulent anisotropy on pulsation stability of stars
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  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Zhang%2C+C%2E%22&quot;&gt;Zhang, C.&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Deng%2C+L%2E%22&quot;&gt;Deng, L.&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Xiong%2C+D%2E+R%2E%22&quot;&gt;Xiong, D. R.&lt;/searchLink&gt;
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  Data: Res. Astron. Astrophys., 17, 29 (2017)
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  Data: 2018
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  Label: Description
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  Data: Within the framework of non-local time-dependent stellar convection theory, we study in detail the effect of turbulent anisotropy on stellar pulsation stability. The results show that anisotropy has no substantial influence on pulsation stability of g modes and low-order (radial order $n_\mathrm{r}&lt;5$) p modes. The effect of turbulent anisotropy increases as the radial order increases. When turbulent anisotropy is neglected, most of high-order ($n_\mathrm{r}&gt;5$) p modes of all low-temperature stars become unstable. Fortunately, within a wide range of the anisotropic parameter $c_3$, stellar pulsation stability is not sensitive to the specific value of $c_3$. Therefore it is safe to say that calibration errors of the convective parameter $c_3$ do not cause any uncertainty in the calculation of stellar pulsation stability.&lt;br /&gt;Comment: 8 pages, 5 figures, published 2017 March
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