| Exomoon detection with Transits | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Exomoon detection with Transits 17th May 2011, 9:06 pm | |
| The Transits of Extrasolar Planets with Moons http://arxiv.org/abs/1105.3189 - Quote :
- The search for extrasolar planets is strongly motivated by the goal of characterizing how frequent habitable worlds and life may be within the Galaxy. Whilst much effort has been spent on searching for Earth-like planets, large moons may also be common, temperate abodes for life as well. The methods to detect extrasolar moons, or "exomoons" are more subtle than their planetary counterparts and in this thesis I aim to provide a method to find such bodies in transiting systems, which offer the greatest potential for detection. Before one can search for the tiny perturbations to the planetary signal, an understanding of the planetary transit must be established. Therefore, in Chapters 3 to 5 I discuss the transit model and provide several new insights. Chapter 4 presents new analytic expressions for the times of transit minima and the transit duration, which will be critical in the later search for exomoons. Chapter 5 discusses two sources of distortion to the transit signal, namely blending (with a focus on the previously unconsidered self-blending scenario) and light curve smearing due to long integration times. I provide methods to compensate for both of these effects, thus permitting for the accurate modelling of the planetary transit light curve. In Chapter 6, I discuss methods to detect exomoons through their gravitational influence on the host planet, giving rise to transit timing and duration variations (TTV and TDV). The previously known TTV effect is updated with a new model and the associated critical problems are outlined. I then predict a new effect, TDV, which solves these problems, making exomoon detection viable. Chapter 7 presents a feasibility study for detecting habitable-zone exomoons with Kepler, where it is found that moons down to 0.2 Earth masses are detectable. Finally, conclusions and future work are discussed in Chapter 8.
_________________ Caps Lock: Cruise control for 'Cool'!
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tommi59 Jovian
Number of posts : 596 Age : 46 Location : Baile Atha Cliath Registration date : 2010-07-31
| Subject: Re: Exomoon detection with Transits 18th May 2011, 3:22 am | |
| Currently only corot 9b and kepler 11g are enough far from their host star to possess any large moons on stable orbit but I hope kepler will find at least one | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: Exomoon detection with Transits 18th May 2011, 3:44 am | |
| It could be argued that Kepler-9 c has a chance to have a detectable moon. _________________ Caps Lock: Cruise control for 'Cool'!
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tommi59 Jovian
Number of posts : 596 Age : 46 Location : Baile Atha Cliath Registration date : 2010-07-31
| Subject: Re: Exomoon detection with Transits 18th May 2011, 6:57 am | |
| Could but the moon should be quite close to the planet | |
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Edasich dK star
Number of posts : 2285 Location : Tau Ceti g - Mid Latitudes Registration date : 2008-06-02
| Subject: Re: Exomoon detection with Transits 18th May 2011, 9:10 am | |
| I wonder how an exo-moon might be listed in EPE. Since it is not a planet | |
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tommi59 Jovian
Number of posts : 596 Age : 46 Location : Baile Atha Cliath Registration date : 2010-07-31
| Subject: Re: Exomoon detection with Transits 18th May 2011, 3:26 pm | |
| In EPE??might be in EEE(EXTRASOLAR EXOMOON ENCYCLOPEDIA) Exomoon??Hmm around corot 9b for example -simply corot 9b1 next moon corot 9b2 | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: Exomoon detection with Transits 18th May 2011, 3:44 pm | |
| I would guess it would be similar to how they list the detected molecules. _________________ Caps Lock: Cruise control for 'Cool'!
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atomic7732 Meteor
Number of posts : 16 Age : 26 Location : Gliese 581 g Registration date : 2011-03-18
| Subject: Re: Exomoon detection with Transits 19th May 2011, 3:00 pm | |
| I agree with Sirius Alpha, listed on the page for the planet. _________________ I'm not sure what to put here yet... but you'll find out soon enough. Then again, maybe no one will... | |
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Lazarus dF star
Number of posts : 3337 Registration date : 2008-06-12
| Subject: Re: Exomoon detection with Transits 19th May 2011, 4:47 pm | |
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tommi59 Jovian
Number of posts : 596 Age : 46 Location : Baile Atha Cliath Registration date : 2010-07-31
| Subject: Re: Exomoon detection with Transits 24th August 2011, 6:19 am | |
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| Subject: Re: Exomoon detection with Transits | |
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| Exomoon detection with Transits | |
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