Difference between revisions of "Triggers:Flares"

Revision as of 13:32, 27 August 2009

Statistical study of M dwarf flares in Stripe 82 is presented in Kowalski et al. 2009.

Colour range for M-dwarfs (r − i) > 0.53 and (i − z) > 0.3 and (u-r) > 3
flares are the most pronounced in u-band
around 35% of M-dwarfs are in binary systems - these have bluer u-g. Most single M-dwarfs will have u-g > 1.8
g - K > 4
amplitude in u > 0.7 mag up to 5 mag.
large and small flares possible
flaring fraction: 0.0108%, i.e. 1 of every 10,000 observation of a M-dwarf in Stripe 82 resulted in a flare
1.3 flares per hour sq.deg with <math>\Delta u > 0.7</math> mag, with slightly more flares towards the galactic plane.

Example of flares in Gl234AB (V577 Mon) from Doyle et al. 1989

Example flare detected by Pi of the Sky project. From Sokolowski 2008.

High temporal resolution observations of a flare star by Pi of the Sky. From Sokolowski 2008.

@@ Line 15: / Line 15: @@
 [[File:Mdwarf_flare_Gl234AB.png|600px]] Example of flares in Gl234AB (V577 Mon) from [http://ukads.nottingham.ac.uk/abs/1989A%26A...208..208D Doyle et al. 1989]
-[[File:FlareCNLeo-PioftheSky.png|500px]] Example flare detected by Pi of the Sky project. From [http://arxiv.org/abs/0810.1179 Sokolowski 2008].
+[[File:FlareCNLeo-PioftheSky.png|400px]] Example flare detected by Pi of the Sky project. From [http://arxiv.org/abs/0810.1179 Sokolowski 2008].
+[[File:FlareGJ3331A-PioftheSky.png|400px]] High temporal resolution observations of a flare star by Pi of the Sky. From [http://arxiv.org/abs/0810.1179 Sokolowski 2008].