We study the microlensing of Non-Radially Pulsating (NRP) stars. Pulsations are formulated for stellar radius and temperature using spherical harmonic functions with different values of l,m. The characteristics of the microlensing light curves from NRP stars are investigated in relation to different pulsation modes. For the microlensing of NRP stars, the light curve is not a simple multiplication of the magnification curve and the intrinsic luminosity curve of the source star, unless the effect of finite source size can be ignored. Three main conclusions can be drawn from the simulated light curves. First, for modes with $m\neq0$ and when the viewing inclination is more nearly pole-on, the stellar luminosity towards the observer changes little with pulsation phase. In this case, high-magnification microlensing events are chromatic and can reveal the variability of these source stars. Second, some combinations of pulsation modes produce nearly degenerate luminosity curves (e.g., (l,m)=(3,0), (5,0)). The resulting microlensing light curves are also degenerate, unless the lens crosses the projected source. Finally, for modes involving m=1, the stellar brightness centre does not coincide with the coordinate centre, and the projected source brightness centre moves in the sky with pulsation phase. As a result of this time-dependent displacement in the brightness centroid, the time of the magnification peak coincides with the closest approach of the lens to the brightness centre as opposed to the source coordinate centre. Binary microlensing of NRP stars and in caustic-crossing features are chromatic.
The 91T/99aa-like Type Ia Supernova 2019vrq, Part II: 3D, Non-LTE, Low-Amplitude, Pulsating Delayed-Detonation Models of a Promising Standard Candle
Florida State University(佛罗里达州立大学);Tsinghua University(清华大学);University of Texas(德克萨斯大学);European Organisation for Astronomical Research in the Southern Hemisphere (ESO)(欧洲南方天文台);Texas A&M University(德克萨斯农工大学)
Radial oscillations of pulsating neutron stars: The UCIa equation-of-state case
Universidad de La Frontera(弗雷罗纳大学);Eastern Mediterranean University(东地中海大学);Babasaheb Bhimrao Ambedkar University (A Central University)(巴巴萨黑伯·比姆拉奥·安贝德卡尔大学(一所中央大学));Instituto de Astronomía, Universidad Nacional Autónoma de México(墨西哥国立自治大学天文学研究所);Amrita Vishwa Vidyapeetham(阿弥塔维迪亚佩坦大学)
Period-Luminosity Relations, projection factor and radii of Anomalous Cepheids
Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences(波兰科学院尼古拉·哥白尼天文中心);Universidad de Concepción, Departamento de Astronomía(康塞普西翁大学天文学系);Leibniz-Institut für Astrophysik Potsdam (AIP)(波茨坦莱布尼茨天体物理研究所);Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange(蔚蓝海岸大学、蔚蓝海岸天文台、法国国家科学研究中心拉格朗日实验室);LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Cité(巴黎天文台观测天体物理学和宇宙学实验室、巴黎文理研究大学、法国国家科学研究中心、索邦大学、巴黎西岱大学)
A classification algorithm for time-domain novelties in preparation for LSST alerts: Application to variable stars and transients detected with DECam in the Galactic Bulge