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ファイル | 記述 | サイズ | フォーマット | |
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PhysRevD.107.044045.pdf | 614.37 kB | Adobe PDF | 見る/開く |
タイトル: | Highly compact Proca stars with quartic self-interactions |
著者: | Aoki, Katsuki https://orcid.org/0000-0002-9616-096X (unconfirmed) Minamitsuji, Masato |
著者名の別形: | 青木, 勝輝 |
キーワード: | Fluids & classical fields in curved spacetime General relativity General relativity equations & solutions Gravitation, Cosmology & Astrophysics |
発行日: | Feb-2023 |
出版者: | American Physical Society (APS) |
誌名: | Physical Review D |
巻: | 107 |
号: | 4 |
論文番号: | 044045 |
抄録: | We study self-gravitating bound states of a complex vector field, known as Proca stars, with a new type of quartic-order self-interaction, which does not exist in the case of either a complex scalar field or a real vector field. Depending on the sign of the coupling constant, this quartic self-interaction can yield a distinct feature of Proca stars from the previously investigated self-interaction of the vector field. We find that self-gravitating solutions can be so compact that the photon sphere could form. However, we also show that the self-interaction gives rise to a ghost instability for the stars whose compactness is close that for the formation of a photon sphere, which might invalidate the formation of the photon sphere. |
著作権等: | © 2023 American Physical Society |
URI: | http://hdl.handle.net/2433/284865 |
DOI(出版社版): | 10.1103/physrevd.107.044045 |
出現コレクション: | 学術雑誌掲載論文等 |
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