TT Ari and its Quasi-Periodic Oscillations

TL;DR

This paper discusses the transient nature of quasi-periodic oscillations in TT Ari, highlighting their short-lived, variable periods and amplitudes, which challenge traditional long-interval periodogram analysis.

Contribution

It provides an analysis of the transient QPO phenomena in TT Ari, emphasizing their rapid variability and the limitations of standard periodogram methods.

Findings

QPOs are transient and short-lived in TT Ari.

Their periods and amplitudes vary on approximately one-hour timescales.

Long-interval periodograms are generally ineffective for analyzing these QPOs.

Abstract

Quasi-periodic oscillation (QPO) of TT Ari are transient, short-living phenomena. They appear and disappear and their periods and amplitudes vary on a time scale as short as 1 hour. Consequently the periodograms covering longer intervals of time are generally meaningless.