GDOR-like Patterns and UKIRT Merged Stars

 KIC 10681464 at Planet Hunters

UKIRT image

At Planet Hunters we are good at detecting patterns in the Kepler light curves. So it is not unusual to see some speculation on our more interesting star patterns with visual anomalies. In this case we are posing some questions about Gamma Doradus-like (GDOR) stars with very close in neighbors showing up on UKIRT. Is there a link between possible contamination showing up in the field of view and the actual GDOR-like pattern in the light curve? Are we seeing the effect of a background GDOR as contamination? Or is this simply a random event, coincidence with no relationship?  Taking this speculation one step further, can there be, in some instances, a gravitational link between very close in neighbors showing up in the field of view of those stars that appear to be merging? Can some of the light curve patterns be indicating a binary star system relationship?

Tom128

We are seeing a lot of contaminated stars in the Kepler field of view with GDOR-like LC patterns. Any thoughts as to why? Instead of false positive transit drops we are seeing these interesting contamination patterns.

Here are some examples taken from our PH GDOR list:
KIC 10681464 Listed on VSX as a SPB - http://talk.planethunters.org/objects/APH43125465





UKIRT



KIC 10199218 http://talk.planethunters.org/objects/APH73018369


UKIRT



KIC 5301537 http://talk.planethunters.org/objects/APH72114406


UKIRT



KIC 10728428 http://talk.planethunters.org/objects/APH53074550


UKIRT



KIC 12218729 http://talk.planethunters.org/objects/APH72010654



UKIRT



KIC 2695344 http://talk.planethunters.org/objects/APH73093495

4 months ago

djsimister

@Tom128 Not on our list but maybe Another example?

KID 5728217 http://talk.planethunters.org/objects/APH10027511


UKIRT.

4 months ago

Tom128

Yes, it seems instead of false positive transit drops we see these light curve patterns. I did not do any contamination analysis on any of these light curves, but they seem to have the same visual merged or close in neighbor. Here are a some more examples:
KIC 3441414 http://talk.planethunters.org/objects/APH22140442




UKIRT



KIC 4076350 http://talk.planethunters.org/objects/APH52022370



UKIRT



KIC 1295531 http://talk.planethunters.org/objects/APH71094127





UKIRT

4 months ago

arvintan

 here's a couple more from my collection:




KID 6782360: http://talk.planethunters.org/objects/APH52098313




KID 5689219: http://talk.planethunters.org/objects/APH10038724

4 months ago

Tom128

Here is another example of a GDOR-like LC with a close neighbor on UKIRT:

KIC 5650341



http://talk.planethunters.org/objects/APHE2000oht

UKIRT

You can follow this thread on the Planet Hunters Talk Science board here.