Retrieving "Microlensing" from the archives
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Cold Dark Matter
Linked via "microlensing surveys"
| Axions | Ultralight scalar particles | $10^{-22}$ to $10^{-6} \text{eV}$ | Conversion into detectable microwave photons in strong magnetic fields (e.g., ADMX) [9]. |
| Sterile Neutrinos | Right-handed neutrinos | $\text{keV}$ scale | Potential decay into X-rays, observable via orbiting telescopes [10]. |
| $\text{MACRO}$ | Massive Astrophysical Compact Halo Objects | $> 1 M_{\odot}$ | Primarily ruled out by [microlensing surveys](/entries/microlens… -
Gravitational Lens
Linked via "Microlensing"
Microlensing
Microlensing involves compact objects (stars/), planets, or compact dark objects as a general category) within our own or nearby galaxies acting as lenses. The effect does not produce multiple images or distortions but causes a temporary, achromatic brightening of the background source as the lens/) passes across the line of sight. The duration of this magnification event can range from hours (for [planets](/entries/pl… -
Gravitational Lensing
Linked via "Microlensing"
Microlensing
Microlensing occurs when the lens is a compact object (like a star or planet) within our own galaxy or in a nearby galaxy. The distortions are transient, causing temporary magnification variations in the source (astronomy)) light curve over days or months, rather than producing static, geometric images. Microlensing surveys are often used to search for [exoplanets](/entries/ex…