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Astronomy Colloquium - "Probing the Universe’s expansion and the origin of compact object binaries with multi-messenger astronomy "

Event Type
Seminar/Symposium
Sponsor
Department of Astronomy
Location
Kaler Classroon, Astronomy Building
Date
Mar 7, 2023   3:45 pm  
Speaker
Antonella Palmese, University of California - Berkeley
Contact
Rebecca Bare
E-Mail
rsbare@illinois.edu
Phone
217-265-8226
Views
21
Originating Calendar
Astronomy Colloquium Speaker Calendar

The synergy between gravitational wave (GW) experiments, such as LIGO/Virgo, and optical surveys, such as the Dark Energy Survey (DES), is most prominent in the discovery of electromagnetic counterparts to GW events and the application of the standard siren method, which has already enabled several measurements of the Hubble Constant. Our DECam follow-up observations of the first binary neutron star merger detected by LIGO/Virgo enabled the discovery of the first optical counterpart to a GW event and the first standard siren measurement, while also providing information about the origin of the binary. We have later extended the standard siren analysis to compact object binary merger events without electromagnetic counterparts using galaxy catalogs, for which I will present the latest results. These measurements are a promising tool to shed light on the Hubble constant tension in the coming years. In the last part of the talk, I will present some interesting possibilities for the formation of the most massive binary black hole mergers detected so far which are related to galaxies’ central black holes, in particular those in dwarf galaxies and Active Galactic Nuclei.

https://go.illinois.edu/AstroColloquium

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