Megaflare
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by ACS_LPSP
In most cases, many of the stars observed stellar activity . No usually she did for the Giants do not exceed certain values .However, there are a number of stars that give a very mega flash.
http://talk.planethunters.org/#/subjects/APH0000dvq
http://talk.planethunters.org/#/subjects/APH0000h09
http://talk.planethunters.org/#/subjects/APH00005hl
http://talk.planethunters.org/#/subjects/APH0000fyc
http://talk.planethunters.org/#/subjects/APH0000e8x
http://talk.planethunters.org/#/subjects/APH0000gwe
We would like to know the nature of such events.
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by davidbundy77
My guess is that these events are glitches, possibly caused by cosmic rays hitting Kepler.
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by ajamyajax
Well my guess is these look like flares. I believe small red dwarfs are known for such activity due to their rapid rotation and increased magnetism, so probably no coincidence these all seem to be small dwarf stars:
EPIC, 2MASS, J mag, H mag, K mag, J - H, H - K, (J-H spectral type, stellar mass est) (H-K spectral type, stellar mass est)
202790830 , 2MASS J16273320-2821097 , 11.391 , 10.771 , 10.511 , 0.62 , 0.26 , ('K6V', 0.7) , ('M3V', 0.4)
203851147 , 2MASS J16075875-2441319 , 10.752 , 10.134 , 9.828 , 0.618 , 0.306 , ('K6V', 0.7) , ('M4V', 0.24)
9333505 (0.29X R_Sol per NEA)
203604427 , 2MASS J16290873-2534240 , 11.021 , 10.417 , 10.132 , 0.604 , 0.285 , ('K5V', 0.75) , ('M4V', 0.24)
202901848 , 2MASS J16402653-2757081 , 10.643 , 9.994 , 9.763 , 0.649 , 0.231 , ('M7V', 0.098) , ('M1V', 0.52)
Edit: and probably young stars which rotate more rapidly than older stars for perhaps obvious reasons (their spin slows down as they age).
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by davidbundy77
Thanks @ajamyajax, that is a more convincing explanation. Browsing the internet I found this informative NASA video about red dwarf stars with megaflares. https://www.youtube.com/watch?v=hL9OHXw_-A8
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by ajamyajax in response to davidbundy77's comment.
Sure @davidbundy77. And a good NASA video, thanks for posting.
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by ACS_LPSP
Very interesting and informative .I know about the strong activity of red dwarfs, but I like the light curve of the star saw the first time. Ayamiazhah the way, how do you take these data? How do I know they are not in the Simbad and other sources in addition to VIKIsky (and it is no longer updated) I do not know .tak same, I would like to know how you calculate the orbital period of the planets or companions (if double or multiple star)
Yours, . Anton Sobolev.
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by davidbundy77
Here is a huge flare http://talk.planethunters.org/#/subjects/APH0000dld EPIC 202717132
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by ajamyajax in response to ACS LPSP's comment.
I'm not sure what you are asking, but there are plenty of resources available for you here on Planet Hunters and on the internet if you search for them. Good luck.
Edit: maybe this link has some color info that will help:
http://talk.planethunters.org/#/boards/BPH0000007/discussions/DPH0000npePosted
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by ajamyajax in response to davidbundy77's comment.
Re: 202717132 well could be I suppose, but looks like a dwarf nova to me with several days of duration and a gradual rate of decay. But certainly no expert in either phenomena.
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by davidbundy77 in response to ajamyajax's comment.
You are probably right again. This star is mentioned elsewhere on PH as a dwarf nova.
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