Bulletin of the American Physical Society
APS April Meeting 2017
Volume 62, Number 1
Saturday–Tuesday, January 28–31, 2017; Washington, DC
Session R14: Gravitational Wave Observations with Current and Future FacilitiesInvited Undergraduate
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Sponsoring Units: DGRAV Chair: Laura Cadonati, Georgia Institute of Technology Room: Washington 1 |
Monday, January 30, 2017 10:45AM - 11:21AM |
R14.00001: Ground-based gravitational-wave observatories Invited Speaker: Joseph Giaime After decades of development and recent upgrades, a network of ground-based interferometric gravitational-wave detectors has begun regular operation. Last year LIGO's two detectors ran for ca.\ 4 months, observing waves emitted during the inspiral and coalescence of pairs of black holes hundreds of megaparsec from Earth. The results from LIGO's first observational run will be described, as will plans and expectations for a larger network to include Virgo in Europe and other ground-based detectors in the coming years. [Preview Abstract] |
Monday, January 30, 2017 11:21AM - 11:57AM |
R14.00002: Pulsar timing arrays: closing in on low- frequency gravitational waves. Invited Speaker: Laura Sampson Just like electromagnetic radiation, gravitational waves come in a wide spectrum of frequencies. Different frequencies give us access to different physical information about our universe. By taking advantage of the phenomenal stability of the spin rate of millisecond pulsars, pulsar timing arrays will allow us to detect gravitational waves in the nanohertz band. The most likely source in this band is supermassive black hole binaries, formed when galaxies merge, and so the detection of these gravitational waves gives us a new tool to learn about the merger history of galaxies and the environment in galactic cores. I will discuss the exciting astrophysics we can learn using pulsar timing arrays, as well as the prospects and expected timeline for gravitational wave detection in this new frequency regime. [Preview Abstract] |
Monday, January 30, 2017 11:57AM - 12:33PM |
R14.00003: The path to a gravitational-wave detector in space Invited Speaker: Guido Mueller Following the selection of the Gravitational Universe for the third large mission (L3) by ESA and NASA’s interest in partnering with ESA, we are now about a dozen years away from the earliest possible launch of the first space-based observatory. The idea of such an observatory was first formulated about a dozen years after Gertsenshtein and Pustovoit in the USSR and later Weber and Weiss in the US voiced their ideas of using laser interferometer for ground-based gravitational wave observatories. The design of the L3 mission will likely follow the LISA design which was developed from the late 1990’s until the original LISA project was terminated in 2011. The revised LISA mission will detect many mergers between massive and super-massive black holes out to large redshifts, will detect solar mass black holes years before they produce merger signals in ground-based observatories, will measure the distribution of compact galactic binaries and test general relativity in the strong relativistic regime with large signal to noise ratio. I will review the scientific motivation for LISA, present its status, and discuss the next steps towards its realization. [Preview Abstract] |
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