https://scholars.lib.ntu.edu.tw/handle/123456789/575292
標題: | Multiple Images and Flux Ratio Anomaly of Fuzzy Gravitational Lenses | 作者: | Chan J.H.H., Schive H.-Y., Wong S.-K., Chiueh T., Broadhurst T. Schive, H.-Y. Wong, S.-K. Chiueh, T. HSI-YU SCHIVE TZI-HONG CHIUEH |
關鍵字: | Galaxies; Cold dark matters; Critical features; Density fluctuation; Gravitational lens; Large amplitude; Multiple image; Salient features; Surface density; Dark Matter | 公開日期: | 2020 | 卷: | 125 | 期: | 11 | 來源出版物: | Physical Review Letters | 摘要: | Extremely light bosonic wave dark matter (ψDM) is an emerging dark matter candidate contesting the conventional cold dark matter paradigm and a model subject to intense scrutiny of late. This work for the first time reports testable salient features pertinent to gravitational lenses of ψDM halos. ψDM halos are distinctly filled with large-amplitude, small-scale density fluctuations with δρ/ρhalo?1 in form of density granules. This halo yields ubiquitous flux ratio anomalies of a few tens of percent, as is typically found for lensed quasars, and may also produce rare hexad and octad images for sources located in well-defined caustic zones. We have found new critical features appearing in the highly demagnified lens center when the halo has sufficiently high surface density near a very compact massive core. ? 2020 American Physical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091807869&doi=10.1103%2fPHYSREVLETT.125.111102&partnerID=40&md5=cbb6195bcb345e13ccc23fd921e10080 https://scholars.lib.ntu.edu.tw/handle/123456789/575292 |
ISSN: | 319007 | DOI: | 10.1103/PHYSREVLETT.125.111102 |
顯示於: | 天文物理研究所 |
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