The largest ground-based catalogue of M-dwarf flares

Abstract

We present the largest ground-based catalogue of M-dwarf flares to date, comprising 1,229 time-resolved events identified in Zwicky Transient Facility Data Release 17. Using high-cadence ZTF observations collected between April 2018 and September 2020, we analyzed over 93 million variable light curves containing 4.1 billion photometric measurements. Flare candidates were identified through a machine-learning pipeline trained on simulated light curves generated by injecting TESS-based flare templates into ZTF data and then refined through an extensive post-filtering stage combining an additional classifier, metadata checks, and human inspection. For 655 flares with reliable Gaia-based distances and well-sampled light curves, we derived bolometric energies ranging from 10^31 to 10^35 erg. A clear correlation is observed between flare frequency and spectral subtype, with a sharp increase toward later M dwarfs, particularly near M4-M5, coinciding with the transition to full convection. Using 680 flaring stars with known vertical distances from the Galactic plane, we find that the fraction of flaring stars decreases with increasing Galactic height. The resulting catalogue provides the most comprehensive ground-based sample of M-dwarf flares and establishes a framework for flare detection and classification in upcoming wide-field surveys such as the Vera C. Rubin Observatory Legacy Survey of Space and Time.

13 pages, 12 figures, 3 tables, 1 appendix

References in corpus (35)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• The Sloan Digital Sky Survey: Technical Summary
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• A 3D Dust Map Based on Gaia, Pan-STARRS 1 and 2MASS
• Superflares on Solar Type Stars Observed with Kepler I. Statistical Properties of Superflares
• MINIROCKET: A Very Fast (Almost) Deterministic Transform for Time Series Classification
• Kepler Flares I. Active and Inactive M dwarfs
• The H$\alpha$ emission of nearby M dwarfs and its relation to stellar rotation
• Simulations of dynamo action in fully convective stars
• Stellar Flares from the First Tess Data Release: Exploring a New Sample of M-dwarfs
• Kepler Flares II: The Temporal Morphology of White-Light Flares on GJ 1243
• Time-Resolved Properties and Global Trends in dMe Flares from Simultaneous Photometry and Spectra
• The Effective Temperature Scale of M dwarfs
• An Activity-Rotation Relationship and Kinematic Analysis of Nearby Mid-to-Late-type M Dwarfs
• M Dwarfs in SDSS Stripe 82: Photometric Light Curves and Flare Rate Analysis
• The flare catalog and the flare activity in the Kepler mission
• The EPOCH Project: I. Periodic variable stars in the EROS-2 LMC database
• Multi-wavelength characterization of stellar flares on low-mass stars using SDSS and 2MASS time domain surveys
• Anomaly detection in the Zwicky Transient Facility DR3
• Statistical Analysis of Stellar Flares from the First Three Years of TESS Observations
• The largest M dwarfs flares from ASAS-SN
• An analysis of feature relevance in the classification of astronomical transients with machine learning methods
• Year 1 of the ZTF high-cadence Galactic Plane Survey: Strategy, goals, and early results on new single-mode hot subdwarf B-star pulsators
• A Catalog of M-dwarf Flares with ASAS-SN
• Magnetic fields in fully convective M-dwarfs: oscillatory dynamos vs bistability
• Fast optical flares from M dwarfs detected by a one-second-cadence survey with Tomo-e Gozen
• The Deeper, Wider, Faster Program: Exploring stellar flare activity with deep, fast cadenced DECam imaging via machine learning
• Statistical relations between stellar spectral and luminosity classes and stellar effective temperature and surface gravity
• SNAD catalogue of M-dwarf flares from the Zwicky Transient Facility
• Minute-cadence Observations of the LAMOST Fields with the TMTS: III. Statistic Study of the Flare Stars from the First Two Years
• A Pilot Search for Gravitational Self-Lensing Binaries with the Zwicky Transient Facility
• Enhancing the detection of low-energy M dwarf flares: Wavelet-based denoising of CHEOPS data
• Using LSDB to enable large-scale catalog distribution, cross-matching, and analytics