Observed Rate Variation in Superflaring G-type Stars
arXiv:2212.00993 · doi:10.3847/1538-4357/aca476
Abstract
Flare occurrence on the Sun is highly variable, exhibiting both short term variation due to the emergence and evolution of active regions, and long-term variation from the solar cycle. On solar-like stars, much larger stellar flares (superflares) have been observed, and it is of interest to determine whether observed rates of superflare occurrence exhibit similar variability to solar flares. We analyse 274 G-type stars using data from the Transiting Exoplanet Survey Satellite (TESS) and identify seven stars which exhibit statistically significant changes in the rate of superflare occurrence by fitting a piecewise constant-rate model with the Bayesian Blocks algorithm (Scargle et al 2012; arXiv:1207.5578). We investigate the properties of these stars and their flaring rates, and discuss the possible reasons for the low number of stars with detectable rate variation.
arXiv comment18 pages, 13 figures, ApJ Accepted 2022-11-21
References in corpus (35)
- Gaia Data Release 2. Summary of the contents and survey properties
- The Gaia mission
- The Revised TESS Input Catalog and Candidate Target List
- Studies in Astronomical Time Series Analysis. VI. Bayesian Block Representations
- Superflares on Solar Type Stars Observed with Kepler I. Statistical Properties of Superflares
- The Effect of a Strong Stellar Flare on the Atmospheric Chemistry of an Earth-like Planet Orbiting an M dwarf
- Kepler Flares I. Active and Inactive M dwarfs
- Stellar Flares from the First Tess Data Release: Exploring a New Sample of M-dwarfs
- The Kepler Catalog of Stellar Flares
- Kepler Flares II: The Temporal Morphology of White-Light Flares on GJ 1243
- Superflares on Ordinary Solar-Type Stars
- Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles
- Can Superflares Occur on Our Sun?
- 25 Years of Self-Organized Criticality: Solar and Astrophysics
- Driving major solar flares and eruptions: a review
- Modeling Repeated M-dwarf Flaring at an Earth-like Planet in the Habitable Zone: I. Atmospheric Effects for an Unmagnetized Planet
- Statistical properties of superflares on solar-type stars based on 1-min cadence data
- Superflares on Solar-Type Stars Observed with Kepler II. Photometric Variability of Superflare-Generating Stars : A Signature of Stellar Rotation and Starspots
- The Origin of the Solar Flare Waiting-Time Distribution
- Identification of Background False Positives from Kepler Data
- Do Kepler superflare stars really include slowly-rotating Sun-like stars ? - Results using APO 3.5m telescope spectroscopic observations and Gaia-DR2 data -
- Statistical Properties of Superflares on Solar-type Stars: Results Using All of the Kepler Primary Mission Data
- The Evolution of Flare Activity with Stellar Age
- Practical Planet Prospecting
- Superflares on solar-type stars from the first year observation of TESS
- The influence of metallicity on stellar differential rotation and magnetic activity
- Evidence for photometric activity cycles in 3203 Kepler stars
- Superflares, chromospheric activities and photometric variabilities of solar-type stars from the second-year observation of TESS and spectra of LAMOST
- Investigating the Rotational Phase of Stellar Flares on M dwarfs Using K2 Short Cadence Data
- Superflares and Variability in Solar-Type Stars with in the Southern Hemisphere
- Probing the Origin of Stellar Flares on M dwarfs Using TESS Data Sectors 1-3
- 10 Years of Stellar Activity for GJ 1243
- Activity Analyses for Solar-type Stars Observed with Kepler. II. Magnetic Feature Versus Flare Activity
- Evidence for departure from a power-law flare size distribution for a small solar active region
- Sounding stellar cycles with Kepler - III. Comparative analysis of chromospheric, photometric and asteroseismic variability