Date: Wednesday 01-Nov-2023
Time: 11:30-12:30 pm
Location: PSC 1136
Speaker: Joanna Berteaud (University of Maryland)
Title: Millisecond pulsars in the Galactic bulge: An adventure across the electromagnetic spectrum
Abstract: About fifteen years ago, the Fermi Large Area Telescope discovered a mysterious gamma-ray signal strongly peaked towards the Galactic center, the so-called Galactic center or GeV excess. Should this emission be caused by millisecond pulsars (MSPs) in the Galactic bulge, their discovery would greatly benefit many domains of physics and astrophysics. Thanks to a simulation of the population of MSPs in the Milky Way, we have shown that some bulge MSPs have likely been detected in past X-ray observations. Motivated by this result, we have selected bulge MSP candidates among yet unidentified X-ray sources according to their spectral shape and their lack of strong UV, optical and IR counterparts. We are now conducting deep targeted pulsation searches at radio wavelengths, aiming to unveil the first direct evidence of a population of bulge MSPs.
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