# Events Archive

## Gravity Group Seminar

### Princeton University Gravity Seminar, "Conserved quantities of gravity"

Wed, Apr 9, 2014, 1:30 pm to 2:30 pm
Speaker: Mu-Tao Wang (Columbia) Abstract: I shall discuss the notion of conserved quantities, including mass, energy, linear momentum, angular momentum, and center of mass at both the quasi-local and total level (for isolated systems).

### Gravity Group Astrophysics|Cosmology Lunch: Renee Hlozek, "Planck Data Reconsidered"

Fri, Apr 4, 2014, 12:00 pm to 1:30 pm
We re-analyze the Planck data and find that the 217GHz x 217GHz detector set spectrum used in the Planck analysis is responsible for some of the tension between the Planck parameters and other astronomical measurements.

### Special Cosmology Seminar, Sauro Succi "Lattice Boltzmann simulations across scales: turbulence, foams and quark-gluon plasmas"

Mon, Mar 17, 2014, 11:00 am to 12:00 pm
In the last two decades, the Lattice Boltzmann (LB) method has attracted major interest as an efficient computational scheme for the numerical simulation of complex fluid problems across a broad range of scales and applications; from fluid turbulence in complex geometries, all the way down to biopolymer translocation in nanopores.

### Special Cosmology Seminar, Nico Yunes "I-Love-Q"

Tue, Mar 11, 2014, 2:00 pm to 3:00 pm
Neutron stars and quark stars are not only characterized by their mass and radius, but also by how fast they spin, through their moment of inertia, and how much they can be deformed, through their Love number and quadrupole moment. These depend sensitively on the star's internal structure, and thus on unknown nuclear physics.

### Gravity Group Astrophysics|Cosmology Lunch

Fri, May 18, 2012, 12:00 pm to 1:30 pm

### Gravity Group Astrophysics|Cosmology Lunch

Fri, May 11, 2012, 12:00 pm to 1:30 pm

### Gravity Group Astrophysics/Cosmology Lunch

Fri, Apr 20, 2012, 12:00 pm to Mon, Apr 16, 2012, 1:30 pm

### Gravity Group Astrophysics|Cosmology Lunch

Fri, Apr 20, 2012, 12:00 pm to 1:30 pm

### Gravity Group Astrophysics Cosmology Lunch, "Stochastic Gravitational Wave Backgrounds and Orbital Random Walks"

Fri, Apr 13, 2012, 12:00 pm to 1:30 pm
Abstract: We demonstrate that a stochastic gravitational wave background will cause the period of a binary system to undergo a random walk. Since the change in period has an accumulating effect on the phase, using this behavior as a detector has a dramatic advantage --- the sensitivity increases with T^2 instead of the usual T^(1/2).

### Gravity Group Astrophysics/Cosmology Lunch

Fri, Mar 30, 2012, 12:00 pm to 1:30 pm
Discussants: Jon Gudmundsson, Neutrinos and the CMB BingKan Xue, Conformal consistency relations for single-field inflation. http://arxiv.org/abs/1203.4595 Emily Grace, TBD

http://www.princeton.edu/cosmology/journal-club/

### Princeton University Gravity Group Astrophysics|Cosmology Lunch

Fri, Mar 16, 2012, 12:00 pm to 1:30 pm
We will have three Journal Discussions this Week Fethi M. Ramazanoglu - Black holes in scalar-tensor gravity http://arxiv.org/abs/1109.6324 Theodor Brasoveanu - TBD Sasha Rahlin - TBD

http://www.princeton.edu/cosmology/journal-...

### Gravity Group Astrophysics/Cosmology Lunch, "Vector Inflation and the Baryon Asymmetry Problem"

Fri, Mar 9, 2012, 12:00 pm to 1:30 pm
Speaker: Stephon Alexander, Haverford/Princeton Absract:

### Gravity Group Astrophysics/Cosmology Seminar, "Eccentric black hole-neutron star mergers"

Fri, Mar 2, 2012, 12:00 pm to 1:30 pm

Abstract: There is a high level of interest in black hole-neutron star binaries, not only because their mergers may be detected by gravitational wave observatories in the coming years, but also because of the possibility that they could explain a class of short duration gamma-ray bursts.

### Astrophysics/Cosmology Journal Club, "The (quantum) field theorist's approach to gravitational dynamics"

Fri, Feb 24, 2012, 12:00 pm to Mon, Feb 20, 2012, 1:30 pm
Speaker: Rafael Porto, IAS

### Gravity Group Astrophysics/Cosmology Lunch "Topics in gravity/cosmology, Part 2"

Fri, Feb 17, 2012, 12:00 pm to 1:30 pm
To kick off the semester, we will have a series of short (<= 20 min) talks from local postdocs from the Physics and Astronomy departments, the PCTS, and the IAS working on gravity/cosmology-related topics.
cut off time for ordering your hoagie 9:30am Friday ***NEW TIME***

### Gravity Group Astrophysics/Cosmology Lunch, Topics in gravity/cosmology

Fri, Feb 10, 2012, 12:00 pm to 1:30 pm
To kick off the semester, we will have a series of short (<= 20 min) talks from local postdocs from the Physics and Astronomy departments, the PCTS, and the IAS working on gravity/cosmology-related topics.
for ordering your hoagie -- cutoff: 9:30am Friday ***NEW TIME***

### Gravity Group Astrophysics|Cosmology Lunch: Immanuel Buder (KICP, University of Chicago), "CMB Polarization Results from the QUIET Experiment"

Fri, Dec 16, 2011, 12:00 pm to 1:30 pm
Abstract: Inflationary cosmology postulates that the Universe underwent a period of accelerated expansion in the first $10^{-30}$,s after the Big Bang. Inflationary models are attractive because they solve outstanding problems in cosmology: the origin of structure, the absence of monopoles, and the horizon and flatness problems.

### Princeton University Gravity Group Astrophysics Cosmology Lunch

Fri, Dec 9, 2011, 12:00 pm to 1:30 pm
“ACTPol: An instrument for small-scale CMB polarization observations” Speaker: Emily Grace, Princeton University