Poster Open Access

Flare and Starspot-induced Variabilities of Red Dwarf Stars in the Open Cluster M37: Photometric Study on Stellar Magnetic Activity

Chang, Seo-Won; Byun, Yong-Ik; Hartman, Joel D.

Feiden, Gregory

We investigate the statistical properties of flare and starspot-induced variabilities of red dwarf stars in the open cluster M37, particularly (1) understanding magnetic activity phenomena that are seen in groups of stars (with the same age and mass) and (2) the correlations among activity indicators. The use of both tracers is particularly useful for statistical studies since it can provide more homogeneous information about their activity behaviors. We recalibrate the archival imaging data of the M37 obtained by one-month observing run with MMT/Megacam camera, i.e., Deep, High-cadence and Long-term monitoring survey. To detect any significant variability from cool objects, forced photometry with our multi-aperture indexing technique is applied to the entire time-series images. In this contributed talk, we present an update on flare and rotational statistics of this cluster and further strong evidences that support the classical age-rotation-activity paradigm.

This contributed poster (Poster #187) was given in the poster session part of the program at the 19th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun ("Cool Stars 19") in June 2016.
Files (240.7 kB)
Name Size
240.7 kB Download
  • Cadelaresi et al. 2014, ApJ, 792, 67
  • Chang, Byun, & Hartman 2015a, AJ, 149, 135
  • Chang, Byun, & Hartman 2015b, AJ, 150, 27
  • Chang, Byun, & Hartman 2015c, ApJ, 814, 35
  • Dal & Evren 2010, AJ, 140, 489
  • Davenport et al. 2014, ApJ, 797, 122
  • Matt et al. 2015, ApJL, 799, 23
  • Notsu et al. 2013, ApJ, 771, 127
  • Núñez et al. 2015, ApJ, 809, 161


Cite as