A Systematic Study on Energy Dependence of Quasi-Periodic Oscillation Frequency in GRS 1915+105

TL;DR

This study analyzes RXTE/PCA data of GRS 1915+105 to explore how QPO frequency depends on photon energy, revealing new patterns that refine existing models of QPO behavior.

Contribution

It systematically identifies three new energy dependence patterns of QPO frequency, extending previous findings and offering new constraints for theoretical models.

Findings

Confirmed the transition from negative to positive correlation with increasing QPO frequency.

Discovered three additional energy dependence patterns of QPO frequency.

Extended earlier results to provide a more comprehensive understanding of QPO behavior.

Abstract

Systematically studying all the RXTE/PCA observations for GRS 1915+105 before November 2010, we have discovered three additional patterns in the relation between Quasi-Periodic Oscillation (QPO) frequency and photon energy, extending earlier outcomes reported by Qu et al. (2010). We have confirmed that as QPO frequency increases, the relation evolves from the negative correlation to positive one. The newly discovered patterns provide new constraints on the QPO models.