Welcome back! from one version of the Olympics
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1 Welcome back! from one version of the Olympics
2 Welcome back! from one version of the Olympics
3 Welcome back! from one version of the Olympics
4 Passing the torch Welcome back!
5 Welcome back! Olympic flame I seek to light to another
6 Welcome back! Olympic flame I seek to light to another 1 MAR 14 APR
7 Welcome back! Cross-country skiing on Mars to another Baseball on the Moon 1 MAR 14 APR
8 Own the podium (humbly)!
9 Own the Assignment podium! My pencil floated away I gave 110% but my mark was only 99.99% because I wasn t allowed to move my pencil faster than the speed of light! Pencil?!? Albert
10 COLD, LASER-TRAPPED ATOMS: The other energy frontier in particle physics the Rosetta Stone Trapped atoms could be a Rosetta Stone for many aspects of modern physics. Theorists can now dream of using ultracold matter (left) to model physical systems ranging from black holes to globular star clusters (middle). With the help of a few lasers, a cloud of ultracold atoms could even be made to simulate gravity.
11 Here s visual proof of the Pauli Exclusion Principle Welcome back!
12 Welcome back! Here s visual proof of the Pauli Exclusion Principle Two stable isotopes of lithium (Li 7, a boson, and Li 6, a fermion) are trapped in the same cloud at temperatures approaching absolute zero
13 Welcome back! Here s visual proof of the Pauli Exclusion Principle Two stable isotopes of lithium (Li 7, a boson, and Li 6, a fermion) are trapped in the same cloud at temperatures approaching absolute zero The fermions are kept from getting any closer together since they can t occupy the same quantum states
14 A long time ago in a galaxy far, far away
15 Two and a half weeks ago A long time ago in a galaxy far, far away
16 Two and a half weeks ago A long time ago in a galaxy far, far away in a classroom, um, right here
17 Other planetary systems Opening our eyes to new perspectives Planetary astrophysics is finally becoming a statistical science with a sample larger than one There are selection effects in our current sample of exoplanets, biased towards giant planets in small orbits But there are hints that our Solar System may not be as typical as astronomers had assumed for many decades
18 Alien worlds artist s conception
19 Alien worlds like Pandora Cameron s conception
20 Alien worlds like Pandora Cameron s conception
21 Alien worlds
22 Alien real estate
23 21,000 I ve become a real estate agent to science fiction writers
24 HD 80606
25 HD ly Ursa Major
26 Exoplanet HD b The radial velocity variations of the star reveal reflex motions due to the unseen exoplanet The saw-toothed RV curve means very high orbital eccentricity residuals to orbital solution P 112 days
27 Exoplanet HD b The radial velocity variations of the star reveal reflex motions due to the unseen exoplanet The saw-toothed RV curve means very high orbital eccentricity e HD80606 = 0.93 e Mercury ~ 0.2
28 The planet moves fastest when closest to the star Its distance from the star changes dramatically in only a few days
29 The planet moves fastest when closest to the star Its distance from the star changes dramatically in only a few days The extreme change in flux of sunlight will change the atmospheric conditions and the planet s weather on timescales of hours
30 The planet moves fastest when closest to the star Its distance from the star changes dramatically in only a few days The extreme change in flux of sunlight will change the atmospheric conditions and the planet s weather on timescales of hours Climate change? A few C in a century?
31 The planet moves fastest when closest to the star Its distance from the star changes dramatically in only a few days The change in intensity of sunlight will change the atmospheric conditions and the planet s weather on timescales of hours Climate change? A few C in a century? Try 400 C in a week! A climate rollercoaster.
32 Exoplanet HD b
33 Exoplanet HD b Simulation of the light variations seen through the MOST bandpass assuming an exoplanet albedo A = 0.3 (30% reflectivity) Model developed by your fellow ASTR 304 student Charles Zhu
34 Exoplanet HD b
35 Exoplanet HD b Spitzer space observatory m infrared telescope 3 μ < λ < 180 μ
36 Exoplanet HD b
37 Exoplanet HD b
38 Exoplanet HD b models of atmospheric flow patterns after closest passage to the star
39 Alien worlds like Pandora Cameron s conception
40 Back to our regular programming
41
42 Search techniques Other planetary systems 1) RADIAL VELOCITY 2) ASTROMETRY 3) TRANSIT 4) MICROLENSING 5) IMAGING Gravitational tug of war causes star to wobble Radial Velocity: Motion toward and away detected by Doppler shifts in stellar spectra Astrometry: Motion side to side (in plane of sky) detected in images of stars compared to background Eclipses by planets dim the star s light (very slightly) Detected by temporary brightness decrease in light curve Stars sometimes gravitationally lens background stars and the planet can contribute (very slightly) Detection of planet is small blip in lens light curve Planets reflect the starlight and this can be imaged Very Difficult: Requires nulling the star
43 Other planetary systems Search techniques sensitivity to planet mass Radial Velocity Astrometry Lensing Imaging
44 Radial Velocity Astrometry Other planetary systems Search techniques sensitivity to orbital radius Lensing Imaging
45 Other planetary systems Deming & Seager Nature (19 Nov 2009)
Other planetary systems
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