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'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.
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....
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.
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
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.
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...
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.
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.
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.
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.
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. ...