Time-resolved databases with large spatial coverage are quickly becoming a standard tool for all types of astronomical studies. We report preliminary results from our search for stellar flares in the 2MASS calibration fields. A sample of 4343 M dwarfs, spatially matched between the SDSS and the 2MASS calibration fields, each with hundreds to thousands of epochs in near infrared bandpasses, is analyzed using a modified Welch-Stetson index to characterize the variability. A Monte Carlo model was used to assess the noise of the variability index. We find significnat residuals above the noise with power-law slopes of -3.37 and -4.05 for our JH and HKs distributions respectively. This is evidence for flares being observed from M dwarfs in infrared photometry.
@article{arxiv.1101.1363,
title = {Mining Databases for M Dwarf Variability},
author = {James R. A. Davenport and Andrew C. Becker and Suzanne L. Hawley and Adam F. Kowalski and Branimir Sesar and Roc M. Cutri},
journal= {arXiv preprint arXiv:1101.1363},
year = {2015}
}
Comments
7 Pages, 3 Figures, Submitted to the 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun