Events Archive

Gravity Group Seminar

Gravity Group Lunch Seminar, Eiichiro Komatsu "Analytical Model for Non-thermal Pressure in Galaxy Clusters"

Gravity Group Lunch Seminar, Bill Jones, "Informal discussion of the Planck2015 and BICEP/KECK papers"

Gravity Group Lunch Seminar, Nick Battaglia, "Cross correlations with CMB secondaries: constraining cosmological parameters and cluster astrophysics"

Gravity Group Lunch Seminar, Nick Battaglia, "Cross correlations with CMB secondaries: constraining cosmological parameters and cluster astrophysics"
Fri, Jan 23, 2015, 12:00 pm to 1:30 pm

High resolution CMB experiments, such as ACT, SPT, and the Planck satellite are making precision measurements of the secondary anisotropies caused by the thermal Sunyaev Zel'dovich (tSZ) effect from galaxy clusters. However, our ability to obtain cosmological information from this tSZ signal is limited by our theoretical understanding of the...

Gravity Group Lunch Seminar, Ed Belbruno, "A Dynamical Mechanism for the Big Bang and an Alternative Time with w=1"

Gravity Group Lunch Seminar, Ed Belbruno, "A Dynamical Mechanism for the Big Bang and an Alternative Time with w=1"
Fri, Jan 16, 2015, 12:00 pm to 1:30 pm

A dynamical mechanism is given for the big bang for w=1 by the introduction of a new time variable, N, that varies, along with w, when the usual time, t, is fixed at t=0. This yields an extended big bang state at t=0. Within this state, w varies from a universe dominated by the cosmological constant to 1. After w reaches 1, then the big bang...

Gravity Group Lunch Seminar, Vasileios Paschalidis "Numerical relativity: challenges, recent results and future applications"

Gravity Group Lunch Seminar, Aurelien Fraisse, "Planck 2014 Results: Highlights & Outlook"

Gravity Group Lunch Seminar, Aurelien Fraisse, "Planck 2014 Results: Highlights & Outlook"
Fri, Dec 5, 2014, 12:00 pm to 1:30 pm

Following the Planck conference currently underway in Ferrara, Italy, I will present the main results from the Planck 2014 paper and data release scheduled for December 22nd.

http://www.princeton.edu/cosmology/gravity-group-seminar/

Gravity Group Lunch Seminar, Nemanja Kaloper "The End and Other Tall Tales"

Gravity Group Lunch Seminar, Eanna Flanagan (Cornell University) "Angular Momentum in General Relativity and Gravitational Wave Memory"

Gravity Group Lunch Seminar, Justin Khoury, "An Alternative to Particle Dark Matter"

Gravity Group Lunch Seminar, Neil Turok "On Measures and Bounces"

Gravity Group Lunch Seminar, Neil Turok "On Measures and Bounces"
Fri, Oct 24, 2014, 12:15 pm to 2:15 pm

Gravity Group Lunch Seminar joint with String Cosmology and Inflation workshop Speaker: Neil Turok — TBA 1:15—2.15 p.m. PCTS Seminar Room Note: Lunch starts at 12.15pm. Sign-up for lunch and talk is required by Oct 20, 4pm

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

Gravity Group Lunch Seminar: Raphael Flauger, "From the CMB to fundamental physics - A closer look at n_s and r''

Gravity Group Lunch Seminar, Robert Caldwell, "Chiral Gravitational Dynamics in the Early Universe"

Gravity Group Lunch Seminar, Robert Caldwell, "Chiral Gravitational Dynamics in the Early Universe"
Fri, Oct 10, 2014, 12:00 pm to 1:30 pm

I present a toy cosmological model that breaks the symmetry between left and right-handed gravitational waves. The possible implications for the gravitational wave and cosmic microwave backgrounds are explored. In the end, it all comes down to spinning tops.

Gravity Group Lunch Seminar, Paul Steinhardt, "Recent progress in bouncing cosmologies"

Luis Lehner, "Turbulent black holes, through holography to the real world"

Marc Kamionkowski, B-modes from dust and dark energy

Bill Jones "Near term prospects for measurements of Cosmological B-modes and diffuse, polarized high-latitude Galactic emission"

Bill Jones "Near term prospects for measurements of Cosmological B-modes and diffuse, polarized high-latitude Galactic emission"
Fri, Sep 12, 2014, 12:00 pm to 1:30 pm
Gravity Group Astrophysics | Cosmology Lunch Abstract: Depending on publication schedules... the talk will focus on the upcoming flight of Spider, and/or current data from the Planck spacecraft.

http://www.princeton.edu/cosmology/gravity-group-seminar/

Bill Jones "Near term prospects for measurements of Cosmological B-modes and diffuse, polarized high-latitude Galactic emission"

Bill Jones "Near term prospects for measurements of Cosmological B-modes and diffuse, polarized high-latitude Galactic emission"
Fri, Sep 12, 2014, 12:00 pm to 1:30 pm

Gravity Group Lunch Seminar Depending on publication schedules... the talk will focus on the upcoming flight of Spider, and/or current data from the Planck spacecraft.

http://www.princeton.edu/cosmology/gravity-group-seminar/

Gravity Group Astrophysics|Cosmology Lunch: Sarah Shandera, "Cosmic Variance, Statistical Naturalness and Non-Gaussianity"

Gravity Group Astrophysics|Cosmology Lunch: Sarah Shandera, "Cosmic Variance, Statistical Naturalness and Non-Gaussianity"
Fri, Apr 18, 2014, 12:00 pm to 1:30 pm
The possibility of measuring or constraining correlations of the primordial curvature fluctuations beyond the power spectrum has opened up promising new avenues to differentiate models of inflation. Interestingly, mode coupling also introduces a new and significant uncertainty in matching observations to theory.

Special Cosmology Seminar, Clem Pryke "Detection of B-mode Polarization at Degree Angular Scales"

Special Cosmology Seminar, Clem Pryke "Detection of B-mode Polarization at Degree Angular Scales"
Thu, Apr 17, 2014, 1:30 pm to 3:00 pm
The BICEP2 collaboration recently reported detection of an excess of B-mode power in the polarization pattern of the CMB at few degree angular scales. I will review the experiment and analysis with particular reference to measurement and control of systematics. I will also review the several lines of evidence that the signal is cosmological rather...

Gravity Group Astrophysics|Cosmology Lunch: Alberto Nicolis, "Icosahedral Inflation"

Gravity Group Astrophysics|Cosmology Lunch: Alberto Nicolis, "Icosahedral Inflation"
Fri, Apr 11, 2014, 12:00 pm to 1:30 pm
I will describe "icosahedral inflation”, a generalization of solid inflation in which the fluctuations’ dynamics are not invariant under continuous rotations, but only under the icosahedral subgroup.

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