Download Extrasolarplanets2

Recall the Doppler Method
The doppler method of finding
planets
Allows multiple planets to be discovered
Water Found in system!
Is this Pandora?
Credit:
John Whatmough
Credit: John Whatmough (Extrasolar Visions)
First image of extra solar planet (5MJ)
So what have we found So Far?
174 Planets with Semi Major axis less than 0.4 AU (Mercury/sun distance)
42 Planets with Semi Major axis between 0.4 AU and 0.85 (inside sol’s life zone)
65 Planets with Semi Major axis between 0.85 AU and 1.4 (inside sol’s life zone)
140 Planets with Semi Major axis 1.4 AU and 640 AU
But this isn’t the whole
story!
Note: Me= .003 Mj
Planets near dwarf stars?
Planet
Name
Pl. Mass
Pl.
Semiaxis
St.
Spec.
Type
Pl.
Radius
Pl.
Period
St.
Dist
0.2415
1.58039
3
0.014
13
St.
Mass
St.
[Fe/H]
St.
Radius
GJ 1214 b
0.0179
V391 Peg
b
3.2
1170
1.7
1400
Gliese 876
b
2.64
61.067
0.211
4.7
M4 V
0.334
0.05
0.36
Gliese 876
c
0.83
30.258
0.132
4.7
M4 V
0.334
0.05
0.36
Gliese 876
d
0.02
1.93785
0.021
4.7
M4 V
0.334
0.05
0.36
Gl 179 b
0.82
2288
2.41
12.3
M3.5
0.357
0.3
0.38
Gl 581 b
0.0492
5.36874
0.041
6.26
M3
0.31
-0.33
0.38
Gl 581 c
0.01686
12.9292
0.07
6.26
M3
0.31
-0.33
0.38
Gl 581 d
0.02231
=7 ME
66.8
0.22
6.26
M3
0.31
-0.33
0.38
Gl 581 e
0.00610
4
3.14942
0.03
6.26
M3
0.31
-0.33
0.38
HIP 57050
0.16350
sdB
0.157
0.211
0.5
0.23
A super Earth?
Gliese 876d
Star M3
15 lyrs
Dist= .02 AU
M = 7 ME
Gliese 876 b,c
in 2:1 orbital resonance
Search for Earth like Planets!
• http://www.youtube.com/watch?v=v3Kcw0
UrIFI&feature=fvw
What about Other Multiple Planet
Systems?
A rare find..inner planets
The HD 69830 system
Earth like planets?
Gliese 581e 3.5
ME
• http://www.youtube.com/watch?v=wJXSSYyIVqw
&feature=related
• From NatGeo
Project Kepler
•
•
•
•
Goal is to find terrestrial planets..
Views same group of stars continuously
It works!
http://www.kepler.arc.nasa.gov/
Where to get more info?
• Future missions
• Summary of results
• How you can participate
• NASA Planet Quest
http://planetquest.jpl.nasa.gov