手法を比較

	重力マイクロレンズ	SEDフィッティング
分野	天文学	天文学
系統	Process / pipeline	Process / pipeline
提唱年	1986	2003
提唱者	Bohdan Paczynski	Gustavo Bruzual
種類	Observational detection method	Analysis and modeling method
原典	Paczynski, B. (1986). Gravitational microlensing by the galactic halo. Astrophysical Journal, 304, 1-5.	Bruzual, G., & Charlot, S. (2003). Stellar population synthesis at arbitrary metallicity with the Bruzual & Charlot models. Monthly Notices of the Royal Astronomical Society, 344(3), 1000-1028.
別名	Microlensing, Gravitational Lensing Method	SED Analysis, Spectral Energy Distribution Method, Photometric Redshift
関連	3	3
概要	Gravitational microlensing is an observational technique that exploits Einstein's prediction that massive objects bend light. When a star or planet passes in front of a distant star from our perspective, its gravity acts as a lens, magnifying and distorting the background star's light. First proposed by Bohdan Paczynski in 1986, this method has discovered hundreds of exoplanets and provides unique sensitivity to low-mass planets and dark matter.	Spectral Energy Distribution (SED) fitting is the technique of comparing observed photometric measurements of galaxies across many wavelengths against theoretical predictions from stellar population synthesis models. By fitting models to observations, astronomers estimate galaxy properties including redshift, mass, age, star formation rate, and dust content without requiring expensive spectroscopic observations.