Tootfinder

Reverberation responses in light curves of the SBS1520 530 quasar
Liudmyla Berdina, Victoria Tsvetkova
https://arxiv.org/abs/2506.14222 https://

Reverberation responses in light curves of the SBS1520+530 quasar
Purpose: We aim to investigate an accretion disk (AD) temperature profile of a doubly lensed quasar SBS 1520+530. Temperature profiles of accretion disks are known to be diagnostic of many of the physical properties of AGNs and quasars. Methods: Our approach involves application of the photometric reverberation mapping to the light curves of SBS 1520+530 obtained in the Johnson-Cousins V and R filters. The RM method implies that the time shift between the light curves taken in different spectra…

High Socioeconomic Status is Associated with Diverse Consumption across Brands and Price Levels
Yuanmo He, Milena Tsvetkova
https://arxiv.org/abs/2506.13840

High Socioeconomic Status is Associated with Diverse Consumption across Brands and Price Levels
Consumption practices are determined by a combination of economic, social, and cultural forces. We posit that lower economic constraints leave more room to diversify consumption along cultural and social aspects in the form of omnivorous or lifestyle-based niche consumption. We provide empirical evidence for this diversity hypothesis by analysing millions of mobile-tracked visits from thousands of Census Block Groups to thousands of stores in New York State. The results show that high income is…

High-power RF amplifier for ultracold atom experiments
Premjith Thekkeppatt, Edwin Baaij, Tijs van Roon, Klaasjan van Druten, Florian Schreck
https://arxiv.org/abs/2506.18137