Investigating extrasolar planets

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geeksoo
Posts: 12
Joined: Tue Jun 08, 2004 6:35 pm

Investigating extrasolar planets

Post by geeksoo »

Im actually trying to investigate extrasolar planets and their planetary behaviour by observing eclipsing binaries for my ssef project basicaly because

1. The orbital plane of the 2 stars are almost in line with the observer, hence reducing the problem of inclination when observing extrasolar planets which in turn results in only a lower limit estimation of the "planets" mass as M sin i( where i is the angle of inclination of the orbital plane to the plane of the observer.)

2.Concentrated efforts on stars with spectral class G, K, M has left out the investigation of O and B blue supergiants, mostly believed to not able to hold any planets(or at least not habitable planets). so by observing an eclipsing binary pair between a O-B star and a M star we can simulate an effect of a (small brown dwarf/Large hot jupiter) with a high albedo revolving around an O-B parent star. Furthermore what is even more fascinating is that these eclipsing binaries offer an opportunity to explore "large hot jupiters" with short orbit and high eccentricity, which is especially common property in existing extrasolar planets, but is contradicting with current theories with planetary system formations.

3.And of course most importatntly as photometic approach is tipped as the most probable method to replace relative velocity to find new planets, it is very important to test the ability of amateurs in contrbuting to this field and especially[glow=red] amateurs in singapore[/glow]. :)

So i was just wondering if anyone knew how to convert CCD images into light intensity peaks? and more important:is there gonna be any nice soul lending me CCD and equipment. :) Pls help haha! any help will be really really appreciated.
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Tachyon
Posts: 2038
Joined: Wed Jun 01, 2005 11:40 am
Location: Bedok

Post by Tachyon »

You can use the Photoshop 'Histogram' function to generate the light intensity curve. The values will be from 0 - 254. You have to use a standard star with known constant magnitude (preferably captured within the same image) to adjust the values of your data. Since most CCDs generate a linear light response curve, the conversion should be straight-forward.

Cheers!
[80% Steve, 20% Alfred] ------- Probability of Clear Skies = (Age of newest equipment in days) / [(Number of observers) * (Total Aperture of all telescopes present in mm)]
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