| January
19, 2009 |
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Martin
Luther King Jr. Day |
| January 26, 2009 | Florida Astro Winter Workshop |
| Bryant 217 |
Kaitlin
Kratter (University of Toronto) |
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Accreting Protostellar Disks:
fragmentation and multiplicity |
| Abstract | In the early phases of star formation, protostellar disks
accrete material rapidly from an envelope of gas and dust. When the
Mach number of the infalling material becomes large, disks can no
longer funnel all of the gas down onto the central star. This causes
the disk mass to increase until self-gravity comes to dominate angular
momentum transport. Under these circumstances, local disk models break
down. To better understand the evolution of these unstable systems, we
have combined theoretical disks models with three dimensional global
AMR simulations to carry out a parameter space study of rapidly
accreting disks. I will present the first results from this study and
show how we can predict disk behavior and gain insight into both
stellar multiplicity and the upper mass limit for stars. |
| February
2, 2009 |
Florida Astro Winter Workshop |
| tba |
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| Abstract | |
| February
9, 2009 |
Florida Astro Winter Workshop |
| tba |
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| Abstract | |
| February
16, 2009 |
|
| Bryant 217 |
Mariano Moles (IAA,
Spain) |
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| Abstract | |
| February
23, 2009 |
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| tba |
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| Abstract | |
| March
2, 2009 |
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| tba |
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| Abstract | |
| March
9, 2009 |
|
| Spring
Break |
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| March
16, 2009 |
|
| Dimitri Veras (UF
Astronomy) |
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Secular and Resonant Orbital Dynamics of Hierarchical Two-Planet Systems |
| Abstract | The preponderance of known multi-planet extrasolar systems has kindled interest in using their resonant and secular dynamical evolution as a probe of planet formation. We explore the orbital evolution of a class of these systems -- "hierarchical" systems -- by utilizing realistic *ensembles* of initial conditions, which are derived from published data, and by considering the *full range* of the planets' currently unknown relative and line-of-sight inclinations. We demonstrate how these planets may reside in high-inclination asymmetric resonance, and report on the planets' resulting stability, secular evolution regimes, and sometimes dominant influences from general relativity. |
| March
23, 2009 |
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| Abstract | |
| March
30, 2009 |
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| tba |
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| Abstract | |
| April
6, 2009 |
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| Tarek Saab (UF
Physics) |
|
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The Micro-X and MARE
Experiments: Doing Astrophysics with Micro-Calorimeters |
| Abstract | |
| April 13, 2009 | |
| Bryant 217 |
2nd year talks (UF
Astronomy) |
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| Abstract | |
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| May
11, 2009 |
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| Bryant 217 |
Tsevi Mazeh |
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The Transiting Extrasolar
planets: How do we find them and what can we learn from them |
| Abstract | More than 300 extrasolar planets
were discovered since 1995, when the first planet was detected. About
50 of these planets eclipse their parent star once every orbital period. The detection of these transiting planets in the last few years allowed the derivation of the planetary dynamical masses and radii and sometimes even the planetary temperatures and atmospherical features. The transiting timing can be quite accurate, and therefore small deviations from the planetary Keplerian motion can be detected. The talk will review the detection and study of the presently known transiting planets. |
Fall
2008 Schedule