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j.physletb.2014.01.054.pdf | 306.35 kB | Adobe PDF | 見る/開く |
タイトル: | Electron screening effects on crustal torsional oscillations |
著者: | Sotani, Hajime |
著者名の別形: | 祖谷, 元 |
キーワード: | Neutron stars Shear oscillations Electron screening |
発行日: | 7-Mar-2014 |
出版者: | Elsevier B.V. |
誌名: | Physics Letters B |
巻: | 730 |
開始ページ: | 166 |
終了ページ: | 170 |
抄録: | We systematically examine the crustal torsional oscillations as varying the stellar mass and radius, where we take into account the effect of electron screening due to the inhomogeneity of electron distribution. In the examinations, we adopt two different equations of state (EOSs) for the inner crust region of neutron stars. As a result, we find that the frequencies depend obviously on the EOS, even if the neutron star models are almost independent of the EOS. That is, one could solve the degeneracy of the stellar models with different EOS via the observations of shear oscillations frequencies. Additionally, we find that the fundamental frequencies of the ℓ-th order torsional oscillations can reduce 6% due to the effect of electron screening, which is independent of the adopted EOS and stellar models. This reduction of frequencies can be crucial to make constraints on the density dependence of the nuclear symmetry energy, L, i.e., the constraint on L can reduce ∼15% by the electron screening effect. |
著作権等: | © 2014 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). |
URI: | http://hdl.handle.net/2433/182945 |
DOI(出版社版): | 10.1016/j.physletb.2014.01.054 |
出現コレクション: | 学術雑誌掲載論文等 |
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