APH00014jl

• by MeanOyster

  Hi, i have some issues here: https://talk.planethunters.org/#/subjects/APH00014jl .

  First, this star looks like a single cepheid star, but is registered as eclipsing binaries here: http://keplerebs.villanova.edu/overview/?k=7377033 .

  So, i'm not sure what i am seeing.

  Second, it seems that there's a jupiter-like transiting planet around this star. With a 2-days period!!!! I can't imagine a planet of this size might reach such a velocity.

  So, I'd like to have your opinion on this.

  Posted March 5, 2017 8:21 PM

• by zoo3hans

  If it is classified as an EB in the Kepler Eclipsing Binaries catalog, it would trust this classification. A quick look at the LC seems to confirm this: we see alternating eclipse depths which is a sure sign of an EB.

  Posted March 5, 2017 9:04 PM

• by MeanOyster

  If this is a real EB, the 2 days period light loss really disturb me. I assume an object (jupiter like planet or brown dwarf) would be ejected from its orbit at this velocity.

  Posted March 6, 2017 2:14 PM

• by MeanOyster

  After several research , still no idea of what it is. An EB with a light curve like this should be an "overcontact" binary, but the 4 days period doesn't fit (it would be way faster).

  Sources: http://articles.adsabs.harvard.edu//full/2005SASS...24...23B/0000034.000.html

  https://en.wikipedia.org/wiki/W_Ursae_Majoris_variable

  Another hint, images 4-1 ; 6-1 ; 7-1, the two stars of the binary seems to change weirdly at the same time.

  So it might be a single variable star.

  But in this case, this one is too small to be a #cepheid (usually giant stars), and the period is too low for a #RRLyrae .

  Any ideas?

  I know we are looking for planets, but someone told me to # the different type of stars. I tried to but, really ,i don't know what this one is.

  Posted March 6, 2017 6:35 PM