corrected: october 12, 2012
NEW stuff added shows below in italics

For this homework, as for any assignment, showing/documenting your work counts the vast majority of the credit; correct answers are, of course, preferred also

Planets that are in non-circular orbits will show some small differences between your calculations and the astronomers' because they will have included effects due to orbit eccentricity.
If there is a huge mass difference between what you derive (based on the spectrum and luminosity class of your star) from the first page of the buff book and what the astronomers used, you are welcome to consult me (but not night before the assignment is due).  People who have subgiant stars (class IV) should particularly do so.

Heavy penalties ensue if your calculated values differ from those of the astronomers, without cause.

using ONLY the observable quantities:
period,
spectral/luminosity class of the your planet's star)

IF your planet has more than one extrasolar planet, you MUST find the radial velocity curve for THAT particular planet.... each planet will have a different radial velocity curve; MAKE SURE that you find the correct one....
different planets are denoted by a letter following the star name..... for example
55 Cnc e means that it's the 4th planet discovered chronologically around star 55 in the constellation Cancer

1) attach a printed copy of your planet's star's radial velocity curve with the star's name plainly visible as the cover sheet to this assignment

2) a) Determine the v
v sin i (amplitude of the star's radial velocity curve) from your print out (you may not use the astronomer's/catalog's value but you MAY check to make sure yours matches theirs AS YOU SHOULD FOR ALL OTHER PARTS OF THIS LAB..... ).... show your work!

b) If your radial velocity curve is plotted vs. time, you must also determine the period from your curve (and not use the stated value on the web site)

3) Use the spectral and luminosity class of your planet's star to determine its mass.  Show work!  You may NOT use the value quoted in the catalog (although see previous question's comment)

4) find the lower limit to your planet's mass  (first in solar masses, and then in Jupiter masses) in an organized manner;
make sure it's clear why your value is a lower limit

(make sure that you provide some documentary evidence of how you found this in addition to the answer, for example, guess-and-check intermediate calculations; if you used a graphing method on your calculator, show the graph and where the solution is; do calculators now solve inequalities directly.... i don't think they are there yet, but if so, give me some evidence .....)

5) % difference between your value in #4 and the accepted value (in one of the extrasolar planet catalogs; specify which)

(the % should be less than 2% unless your orbit is noticeably elliptical, in which case the difference might be as much as 10% if extremely elliptical; if the difference is not less than 2%, there's probably a mistake.... go  find it)

6) the planet's orbit size  in au (this will NOT be JUST a lower limit to the orbit size!  make sure that you calculations show why this is not a lower limit whereas the mass was!!)

7) % diff of #6 compared to extrasolar planet catalog (again, difference must be less than 2% unless orbit is very elliptical)

8) a range for the planet's surface temperature (using a reasonable range for your planet's albedo)

9) the likely composition of your planet based on its formation temperature (with complete justification!  yes, the last two questions are a review of the third week of class.... i wonder why we're reviewing?)
reasoning by analogy will get very little credit here...
back in september, we used our solar system's planets' formation temperatures compared to condensation temperatures to determine the composition of the solar system's planets;
you're doing the same thing here

be complete; don't just tell what materials will be part of the planet (and why); tell what won't be in the planet (and why)

10) Finally, it would be helpful if you could attach a sheet, printed from one of the extrasolar planet catalogs, that lists not only the information that you are allowed to use (radial velocity curve amplitude, spectral/luminosity class of the star, and orbit period) but also other information (mass of star, luminosity of star, eccentricity of orbit, etc.) if such a page exists.

11) Also attach the proof of the equation we used in class [by starting with Kepler's third law (special units), the center of mass condition, and the formula for speed in circular orbits].... it should be about 6 lines of algebra