Events Daily

Monday, April 22, 2024

Applied special relativity: Velocities of stars measured at the cm/s level
David Hogg, New York University
Event Type: CCPP Brown Bag
Time: 12:30 PM - 1:30 PM
Location: 726 Broadway, 940, CCPP Seminar
Abstract: Planets are being discovered and measured using radial-velocity (Doppler shift) measurements. Current precision, even for the best spectrographs, is currently limited at 1 m/s, in part because it is non-trivial to even *define* a Doppler shift at better precision. We (Megan Bedell, Lily Zhao, DWH, and others) have new ideas for improving precisions by a factor of 10 or 30. The discovery and measurement of true Earth analogs require a factor of 10 at least.