# Gravitational-wave-moderated Accretion: The Case of ES Ceti

## TL;DR

This paper demonstrates that observations of the ES Ceti binary system align with theoretical models where gravitational-wave radiation stabilizes mass transfer, predicting orbital widening and consistent mass transfer rates from different observational methods.

## Contribution

It provides observational evidence supporting gravitational-wave moderated accretion models for AM CVn systems, specifically for ES Ceti.

## Key findings

- Observed orbital widening matches model predictions
- Mass transfer rates from orbital change and flux are consistent
- Supports gravitational-wave radiation as a key factor in binary evolution

## Abstract

We show that recent observations of the compact binary, AM CVn type system, ES Ceti are fully consistent with theoretical predictions of stable mass transfer moderated by angular momentum loss due to gravitational-wave radiation. One of the main predictions of this model (for degenerate donors) is a widening of the binary. The mass transfer rate inferred from the observed rate of change in the orbital frequency is consistent with that inferred from the observed flux using the recent Gaia DR2 parallax