Science

discussion

RINGS & MOONS

Started by ggccg
Default_user
over 6 years ago
ggccg in response to toniscarmato

toniscarmato:

Look at this one! http://talk.planethunters.org/objects/APH21144466

I see what you're talking about, but I don't think it's quite as conclusive as we'd like to see. You've got the right idea about what to look for though.

Default_user
over 6 years ago

I must say that this discussion is fascinating, how much could potentially be gleaned from the shape of a transit. It's amazing to have the opportunity to be a part of this project.

Here's one about which there had been some speculation about a potential moon. Here's Head Around U's capsule description:

TonyJHoffman 2 planets? http://talk.planethunters.org/objects/APH23075198 0.23 jupiter 2.6 earth 310 days 0.92AU 1.2xsol 8.2GYR 311K 1824LY with moon 1.51-1.85 earth :p and 1.85 earth 92 days 0.41AU 467K

--Tony

Default_user
over 6 years ago

APH10085918. Although a Prsa EB, it has pronounced brightenings on either side of the transits. Probably not an artifact as the diagram below averaged the flux from 6 transits. See comment from dragozzine, a Kepler team member. Although I'm not sure why he thinks rings would lead to a brightening and not dimming - maybe the rings, presumably comprising icy material, would reflect (or refract?) additional light from the star?

Default_user
over 6 years ago

TonyJHoffman:

I must say that this discussion is fascinating, how much could potentially be gleaned from the shape of a transit. It's amazing to have the opportunity to be a part of this project.

Here's one about which there had been some speculation about a potential moon. Here's Head Around U's capsule description:

TonyJHoffman 2 planets? http://talk.planethunters.org/objects/APH23075198 0.23 jupiter 2.6 earth 310 days 0.92AU 1.2xsol 8.2GYR 311K 1824LY with moon 1.51-1.85 earth :p and 1.85 earth 92 days 0.41AU 467K

--Tony

Here's my markup of the event. Not as symmetrical as I'd expect for rings. Maybe moons.

Default_user
over 6 years ago
ggccg in response to kianjin

kianjin:

APH10085918. Although a Prsa EB, it has pronounced brightenings on either side of the transits. Probably not an artifact as the diagram below averaged the flux from 6 transits. See comment from dragozzine, a Kepler team member. Although I'm not sure why he thinks rings would lead to a brightening and not dimming - maybe the rings, made presumably from icy material, would reflect (or refract?) additional light from the star?

Very interesting. I can imagine rings refracting light to create a brightening effect...especially if they are angled upward relative to our line of sight. Another factor to add to the search parameters.

Default_user
over 6 years ago
toniscarmato in response to ggccg

ggccg:

toniscarmato:

Look at this one! http://talk.planethunters.org/objects/APH21144466

I see what you're talking about, but I don't think it's quite as conclusive as we'd like to see. You've got the right idea about what to look for though.

ok, thanks!

Default_user
over 6 years ago

Look like interesting! http://talk.planethunters.org/objects/APH21134325

Default_user
over 6 years ago
ggccg in response to toniscarmato

toniscarmato:

Look like interesting! http://talk.planethunters.org/objects/APH21134325

He's sort of right. Neptune sized planets are not exactly our poster child candidates, but Neptune's rings are also very thin and narrow. That said, if you do see a Neptune sized transit that has the signature features we are considering, by all means post it.

There are a couple of reasons why I emphasized in my original post here that we should limit our searches to LARGE PLANET transits:

  1. Large planets seem to be more likely to have rings that may be detectable.

  2. Large planets are more likely to have moons that are large enough to be detectable.

Bigger is Better. Please keep that in mind before posting.

Default_user
over 6 years ago

@Gerald

APH23022808 is not big I guess, but it occured to me that there might be symmetrical smaller dips to the left and right (about 1 day), again a sign of possible dips? I'd really like to see some good simulations of ring transits.

Pic

Default_user
over 6 years ago

Have you read this ?

~Meg

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