3 papers
astro-ph.CO2024
Eigen-decomposition of Covariance matrices: An application to the BAO Linear Point
Jaemyoung Jason Lee, Farnik Nikakhtar, Aseem Paranjape +1
The Baryon Acoustic Oscillation (BAO) feature in the two-point correlation function (TPCF) of discrete tracers such as galaxies is an accurate standard ruler. The covariance matrix…
astro-ph.CO2024
Astrometric Redshifts of Supernovae
Jaemyoung Jason Lee, Masao Sako, Richard Kessler +2
Differential Chromatic Refraction (DCR) is caused by the wavelength dependence of our atmosphere's refractive index, which shifts the apparent positions of stars and galaxies and d…
astro-ph.CO2024
The Stability of the BAO Linear Point under Modified Gravity
Jaemyoung Jason Lee, Bartolomeo Fiorini, Farnik Nikakhtar +1
Baryon Acoustic Oscillations (BAOs) are crucial in cosmological analysis, providing a standard ruler, as well as constraints on dark energy. In General Relativity models, the BAO L…