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DTSTART;TZID=America/Los_Angeles:20201023T120000
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SUMMARY:VIRTUAL INPA SEMINAR | Sukanya Chakrabarti (RIT)
DESCRIPTION:Speaker: Sukanya Chakrabarti (Rochester Institute Technology) \nTitle: Measuring Accelerations— Near & Far \nAbstract: \nRecent technological advances and observational programs now make it possible for us to directly measure the Galactic acceleration experienced by stars within the Milky Way. I will discuss the traditional method of estimating Galactic accelerations and thereby the Oort limit (from which one determines the local dark matter density given the baryon budget)\, which uses kinematical estimates that can be inaccurate especially in parts of the Galaxy that are significantly perturbed. I will then discuss our method in using extreme precision radial velocity observations to measure the Galactic acceleration\, and ongoing observational programs. I will also use compiled pulsar timing data to directly measure the Galactic acceleration\, which gives us the Oort limit from the Poisson equation without making assumptions of equilibrium or spherical symmetry (as in kinematic estimates). Given the Oort limit\, we then determine the local dark matter density\, which has implications for direct detection experiments. I will discuss the potential for measuring dark matter sub-structure in the Milky Way with pulsar timing\, and for constraining theories of gravity by combining constraints from pulsar timing and extreme precision radial velocity measurements. Finally\, I will end by discussing prospects for measuring the cosmic acceleration. \nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/93826947056?pwd=Q3hGOVpBSVhQcDZqS2plaitYQVB6dz09 \nMeeting ID: 938 2694 7056 \nPasscode: 123733 
URL:https://inpa.lbl.gov/event/virtual-inpa-seminar-sukanya-chakrabarti-rit/
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