Planet Hunters Talk

any work on candidate planets around variable stars or planets with rings?

  • smkolins by smkolins

    Seems to me all the work is filtering for just planets just around non-variable stars? No signs at all of rings and planets around variable stars? I understand that might be the easiest to statistically knock out but but there should be as many planets around variable stars, no? And rings…

    Posted

  • ajamyajax by ajamyajax

    "Astronomers are closing in on exoplanetary rings"

    http://astronomy.com/news/2017/04/finding-ringed-exoplanets

    "Aizawa’s team examined a sample of 89 transiting planet candidates to look for rings. Using the transit light curves, which show the changes in starlight over time as the planet passes in front of its sun, they tried to fit the data to a model of a single planet without rings crossing the face of its star. A poor match between the predicted and actual changes in starlight could signal the presence of rings or other features."

    "One candidate stood out: KIC 10403228, a planet orbiting an M-dwarf star..."

    "Towards Detection of Exoplanetary Rings Via Transit Photometry: Methodology and a Possible Candidate"

    Masataka Aizawa, Sho Uehara, Kento Masuda, Hajime Kawahara, Yasushi Suto

    https://arxiv.org/abs/1702.08252

    "After removing four false positives due to the contamination from nearby stars, we identify KIC 10403228 as a reasonable candidate for a ringed planet. A systematic parameter fit of its light curve with a ringed planet model indicates two possible solutions corresponding to a Saturn-like planet with a tilted ring."


    https://talk.planethunters.org/#/subjects/APH0000689

    https://talk.planethunters.org/#/boards/BPH0000007/discussions/DPH0001idl

    Re 10403228 from Aizawa et al's paper:

    s1=744.86 p1=? d1=2.1 (50.4 hrs)

    From NEA, K1 Targets within search area:

    KIC RA [decimal degrees] Dec [decimal degrees] Distance [arc sec] Kepler-band [mag]

    10403228 291.2267 47.55 0.0 16.064 2MASS J19245441+4732599

    10403240 291.2323 47.5386 43.3 15.898 2MASS J19245574+4732187

    10403229 291.2268 47.5348 54.5 15.582 2MASS J19245444+4732054

    10403204 291.2174 47.5796 108.86 15.056 2MASS J19245217+4734464

    10403338 291.27 47.5714 130.47 15.972 2MASS J19250480+4734171

    10403343 291.2732 47.5315 131.11 15.974 2MASS J19250556+4731533

    kic,tm_name,ra,dec,teff,radius,mass,kepmag,(stellar estimate)

    10403228,2MASS J19245441+4732599,291.226720,47.549980,3690,0.882,,16.064,(M1V)

    ringed planet candidate

    Posted

  • ajamyajax by ajamyajax

    "Giant ringed planet likely cause of mysterious stellar eclipses"

    https://phys.org/news/2017-05-giant-planet-mysterious-stellar-eclipses.html

    "They discovered that every two and a half years, the light from this distant star - PDS 110 in the Orion constellation, which is same temperature and slightly larger than our sun - is reduced to thirty percent for about two to three weeks. Two notable eclipses observed were in November 2008 and January 2011.

    Posted