TACOS: <i>TESS</i> AM CVn Outbursts Survey

ABSTRACT Using Transiting Exoplanet Survey Satellite (TESS), we are doing a systematic study of outbursting AM CVn systems to place some limits on the current outbursts models. We present TESS light curve (LC) for 9 CVns showing both superoutbursts (SOs) and normal (NOs). The continuous coverage with allows us stringent duration structures SOs NOs. evidence that in at least enhanced mass transfer (EMT) has be taken into account explain observed LC rebrighthening phase after SOs. For others, colour evolution from simultaneous observations g r ZTF differs previously reported longer period where EMT is responsible SO. also find due lack sufficiently high cadence many might have been overestimated previous ground-based surveys. report SO 6 CVns. found precursors common feature seen 5 Finally, 10-min 2-min LCs allowed two new candidate orbital periods CVns, which reasonably good agreement predictions their based past outburst histories.