Binary microlensing with plasma environment -- Star and planet
arXiv:2211.13442 · doi:10.1093/mnras/stad200
Abstract
Galactic microlensing has been widely used to study the star and planet. The stellar wind plays an important role in the formation, environment and habitability of the planet. In this work we study a binary microlensing system including the stellar wind, i.e. a star with plasma environment plus a planet. Plasma surrounding the main lens causes chromatic deflection of the light rays, in addition to the gravitational one. As a result, such a lensing system can generate complicated caustics which depends on the different lensing parameters. In this work we study the magnification curves for different traces of the background source and compare the transitions of the formation of ``hill and hole'' in the magnification curves. We find that the plasma will cause extra caustic, shrink the central caustics generated by the star and push the caustic by the planet outwards. Observations and modelling of binary microlensing curves with taking plasma effect into account can provide a potential method to study plasma environment of the stars. In case of a high plasma density of the stellar wind, the plasma lensing effects will be observable in the sub-mm band.
arXiv comment11 pages, MNRAS
References in corpus (33)
- Possible Gravitational Microlensing of a Star in the Large Magellanic Cloud
- Strong field limit of black hole gravitational lensing
- Frequency-dependent effects of gravitational lensing within plasma
- The MACHO project: Microlensing Optical Depth towards the Galactic Bulge from Difference Image Analysis
- Gravitational Lensing in presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow
- The Gaussian Plasma Lens in Astrophysics. Refraction
- Properties of Central Caustics in Planetary Microlensing
- Astrophysical Applications of Gravitational Microlensing
- Effects of plasma on gravitational lensing
- Gravitational lens under perturbations: Symmetry of perturbing potentials with invariant caustics
- Gravitational lensing in a non-uniform plasma
- Two families of astrophysical diverging lens models
- Gravitational radiospectrometer
- Lensing of Stars by Spherical Gas Clouds
- Escape and Trapping of Low-Frequency Gravitationally Lensed Rays by Compact Objects within Plasma
- Wave effects in the microlensing of pulsars and FRBs by point masses
- Gravitational Lensing of Rays through the Levitating Atmospheres of Compact Objects
- Light propagation in a plasma on an axially symmetric and stationary spacetime: Separability of the Hamilton-Jacobi equation and shadow
- Dynamic spectral mapping of interstellar plasma lenses
- Spatial dispersion of light rays propagating through a plasma in Kerr spacetime
- Hills and holes in the microlensing light curve due to plasma environment around gravitational lens
- Accretion disks around Black Holes with Advection and Optical Depth Transition
- The effects of plasma on the magnification and time delay of strongly lensed fast radio bursts
- Microlensing by Compact Objects associated to Gas Clouds
- Levitating atmospheres of Eddington-luminosity neutron stars
- Constraints on Cold H_2 Clouds from Gravitational Microlensing Searches
- OGLE-2019-BLG-1470LABc: Another Microlensing Giant Planet in a Binary System?
- Observable consequences of cold clouds as dark matter
- Does Transparent Hidden Matter Generate Optical Scintillation?
- Microlensing of strongly interacting binary systems
- Microlensed Radio Emission from Exoplanets
- Detecting Fast Radio Bursts in the Milky Way
- Anomaly distribution in quasar magnitudes: a test of lensing by an hypothetic Supergiant Molecular Cloud in the Galactic halo
Cited by in corpus (8)
- Strong deflection limit analysis of black hole lensing in inhomogeneous plasma
- Shadows of rotating black holes in plasma environments with aberration effects
- Time delay induced by plasma in strong lens systems
- Perturbative and numerical approach to plasma strong lensing
- Deflection of light rays in a moving medium around a spherically symmetric gravitating object
- Deciphering signatures of Kerr-Sen black holes in presence of plasma from the Event Horizon Telescope data
- Light deflection in axially symmetric stationary spacetimes filled with a moving medium
- Investigating the interplay of the braneworld gravity and the plasma environment on the black hole shadow