The M4.5V flare star AF Psc as seen in K2 engineering data

TL;DR

This paper analyzes the light curve of the M4.5V flare star AF Psc from K2 data, revealing its rotation period and flare activity, and compares its properties with similar stars to explore stellar magnetic activity.

Contribution

It provides the first detailed analysis of AF Psc's rotation and flare activity using K2 engineering data, and compares these features with other M4V stars.

Findings

Detected a 1.08-day stellar rotation period.

Identified 14 stellar flares, mostly from the same active region.

Compared flare characteristics with other M4V stars.

Abstract

We present the light curve of the little studied flare star AF Psc (M4.5V) obtained using engineering data from the K2 mission. Data were obtained in Long Cadence mode giving an effective exposure of 29 min and nearly 9 d of coverage. A clear modulation on a period of 1.08 d was seen which is the signature of the stellar rotation period. We identify 14 flares in the light curve, with the most luminous flares apparently coming from the same active region. We compare the flare characteristics of AF Psc to two M4V flare stars studied using kepler data. The K2 mission, if given approval, will present a unique opportunity to study the rotation and flare properties of late type dwarf stars with different ages and mass.