Events Archive

Gravity Group Seminar

Gravity Group Seminar, Amber Miller (Columbia University) "EBEX - What we have learned, a surprise, and what comes next"

Gravity Group Seminar, Alessandra Buonanno (MPI for Gravitational Physics) "GW150914 and the next challenges..."

Fri, Apr 8, 2016, 12:30 pm to 1:30 pm

Title: GW150914 and the next challenges in gravitational-wave observations Joint event with the "GR@100++" PCTS workshop. Note special time! For Gravity Group members who attend the seminar talk, there is a free lunch with the workshop participants, starting at Noon. The talk is open for everybody.

Gravity Group Alessandra Buonanno, Max Planck Institute for Gravitational Physics

Fri, Apr 8, 2016, 12:30 pm to Fri, Mar 25, 2016, 1:30 pm
Note: Joint with the PCTS workshop GR@100++. Lunch will be provided in the PCTS Lounge, starting at Noon.

Gravity Group Lunch Seminar, Kris Sigurdson (IAS) "Gravity as a window onto new particle interactions in the dark Universe"

Fri, Apr 1, 2016, 12:00 pm

Gravity's universal coupling to particles and fields makes it our most robust probe of Nature. In the past century it has alerted us to both dark matter and dark energy and our precision gravitational gaze may still have surprises in store.

Gravity Group Seminar, Chuck Bennett (Johns Hopkins University) "Cosmic Convergence?"

Fri, Mar 25, 2016, 12:00 pm to 1:00 pm

Do we have a Standard Model of Cosmology that explains all cosmological measurements with six well-specified parameter values? Having recently celebrated the 50th anniversary of the discovery of the CMB, I summarize what we have learned from the CMB (our most powerful cosmological tool) and from combining the CMB with other cosmological data....

Gravity Group Seminar, Jean-Loup Puget (Institut d’Astrophysique Spatiale, Orsay)

Fri, Mar 4, 2016, 3:00 pm to 4:00 pm

*Note the special time*

Special Cosmology Seminar, Jean-Loup Puget (IAS, Orsay) "Low multipole polarization measurements from Planck"

Gravity Group Seminar, Sean McWilliams (W. Virginia University)

Gravity Group Seminar, Sean McWilliams (W. Virginia University) "The Birth of Observational Gravitational-Wave Astrophysics, and Its Future"

Fri, Mar 4, 2016, 12:00 pm to 1:00 pm

On September 14, 2015, the unique gravitational-wave signature of a binary black-hole binary merger was detected by the Advanced LIGO observatories. This marks the beginning of a completely new era of modern physics, the dawn of observational gravitational-wave astrophysics.

Gravity Group Seminar, Liang Dai (IAS, JHU) "Gravitationally lensed gravitational waves"

Fri, Feb 26, 2016, 12:00 pm to 1:00 pm

Current and forthcoming ground and space-based gravitational-wave observatories will detect gravitational wave events from binary mergers up to cosmological distances.

Gravity Group Lunch Seminar, Ted Jacobson, "Hawking radiation and the trans-Planckian puzzle: from black holes to rubidium condensates"

Fri, Feb 19, 2016, 12:00 pm to 1:00 pm
Speaker: Ted Jacobson (University of Maryland) Title: “Hawking radiation and the trans-Planckian puzzle: from black holes to rubidium condensates” Abstract: In recent experiments with rubidium Bose-Einstein condensates, Jeff Steinhauer has observed stimulated and, possibly, spontaneous emission

Special Cosmology Seminar, Soichiro Isoyama (U. of Guelph) "Hamiltonian dynamics of large-mass-ratio binaries: the self-force approach"

Gravity Group Seminar, Vicky Kalogera (Northwestern University) "The Quest for the Era of Gravitational-Wave Astrophysics"

Fri, Feb 12, 2016, 12:00 pm to 1:00 pm

Following a multi-year upgrade the LIGO detectors turned on this past September for the first Advanced LIGO observing run (O1). In this talk I will discuss the significance of this increased sensitivity in the context of searches for gravitational waves from binary compact objects.

Gravity Group Seminar, Chris Tully "Status of PTOLEMY for Calorimeter-based Relic Neutrino Detection and Neutrino Mass Measurement"

Fri, Feb 5, 2016, 12:00 pm to 1:00 pm

Abstract: Progress toward first measurements of the beta-spectrum are reported with tritium-loaded graphene interfaced to the PTOLEMY MAC-E filter and measured with a 50mK microcal. The preparation for the commissioning of PTOLEMY and plans for neutrino mass measurements are presented and their relevance to BSM physics in the interface of...

Special Cosmology Seminar, James Mertens (Case Western) "Inhomogeneous Cosmological Spacetimes in Numerical Relativity"

Wed, Jan 20, 2016, 11:00 am to 12:00 pm
Recent advances in numerical relativity allow for stable numerical evolution of the full Einstein field equations, an achievement that is only beginning to be taken advantage of in cosmology. I will discuss our work modeling inhomogeneous dust spacetimes, including numerical methods and our results so far.

Gravity Group Seminar, Jeff Peterson (Carnegie Mellon) "Fast Radio Bursts"

Fri, Jan 15, 2016, 12:00 pm to 1:30 pm

I will report on the discovery of a new fast radio burst with a detection of Faraday rotation, wavelength-dependent scattering, and scintillation. The data imply source location in the dense central region of its host galaxy or the presence of magnetized material associated with the source itself. The burst was detected with GBT at 800MHz.

Gravity Group Seminar, Marius Lungu (UPenn) "Mapping the Polarized Microwave Sky with ACTPol"

Fri, Jan 8, 2016, 12:00 pm to 1:30 pm

ACTPol is a novel polarization-sensitive receiver for the Atacama Cosmology Telescope (ACT) designed to measure the Cosmic Microwave Background (CMB) anisotropies to high precision on a wide range of angular scales.

Gravity Group Seminar, "Astronomy's "Next Big Thing:" What can we expect from direct gravitational--wave observations in the near term?”

Fri, Dec 11, 2015, 12:00 pm to 1:30 pm

Speaker(s): Szabolcs Marka adn Imre Bartos, Columbia University in the City of New York Advanced LIGO's completion and ongoing observation run might put the first direct detection of gravitational waves on the horizon, just in time for the 100th anniversary of Einstein's prediction.

Gravity Group Seminar, Robert Brandenberger (McGill University) "Towards a construction of a bouncing cosmology making use of the AdS/CFT corresponden

Fri, Dec 4, 2015, 12:00 pm to 1:30 pm
A key problem in constructing bouncing cosmologies is how to match the cosmological fluctuations in the high curvature bounce region. We study an approach to this problem in which we use the AdS/CFT correspondence to map the physics onto a boundary gauge theory which is weakly coupled at times when the bulk space-time has a high curvature.

Gravity Group Seminar, Avery Broderick (Perimeter Institute), "Images on the horizon: A view of black holes from the Event Horizon Telescope"

Fri, Nov 20, 2015, 11:30 am to 1:00 pm

Supermassive black holes, located at the centers of galaxies, are at once an extreme consequence of general relativity and the sites of energetic processes that shape the cosmos.