Scientific Colloquium
May 29, 2024, 3:00 P.M.
Building 3, Goett Auditorium
H.
THANKFUL CROMARTIE
U.S. NAVAL RESEARCH
LABORATORY
"Detecting
Gravitational Waves With Pulsar Timing: Updates from NANOGrav
and the IPTA"
The North American Nanohertz
Observatory for Gravitational Waves (NANOGrav) collaboration
recently published its 15-Year Data Set, providing substantial
evidence for a nHz background of gravitational waves and marking
an exciting milestone for pulsar timing arrays. Since the
publication of our 12.5-Year Data Set, which strongly suggested
the presence of a common red noise process in NANOGrav's
millisecond pulsar (MSP) timing data, we have added 21 new MSPs
and 3 years of data. This colloquium will touch on the
improvements between our 12.5 and 15-year data releases, results
from the 15 year gravitational wave search, and exciting
synergistic science results. NANOGrav's participation in the
International Pulsar Timing Array's Third Data Release effort,
as well as what lies on the horizon for pulsar timing array
experiments, will also be discussed.
About the Speaker:
Dr. Thankful Cromartie is a National Research Council
Postdoctoral Associate at the U.S. Naval Research Laboratory.
Her research concerns millisecond pulsar (MSP) timing and its
application to the detection of nHz gravitational waves with
pulsar timing arrays. She also precisely measures neutron star
masses using radio and gamma-ray observations of MSPs in an
effort to constrain the neutron star equation of state. Since
2015, she has been a member of the North American Nanohertz
Observatory for Gravitational Waves (NANOGrav) collaboration,
and currently serves as chair of its Pulsar Timing working
group.
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