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DTSTART;TZID=Europe/Madrid:20260528T150000
DTEND;TZID=Europe/Madrid:20260528T160000
DTSTAMP:20260415T060303
CREATED:20260330T092531Z
LAST-MODIFIED:20260330T092531Z
UID:24676-1779980400-1779984000@www.ift.uam-csic.es
SUMMARY:Seminar by Marco Finetti (U. Aveiro)
DESCRIPTION:Title: ‘First Order Phase Transitions and Gravitational Waves’ \nVenue&Time: Red Room / 15:00 \nSpeaker: Marco Finetti (U. Aveiro) \nAbstract: The Laser Interferometer Space Antenna (LISA) will be the first space-based gravitational wave (GW) detector\, opening a new observational window for both astrophysics and early-Universe cosmology. Operating in the millihertz band\, it will probe a rich superposition of GW signals. Astrophysical population models predict a sufficient number of signals in the LISA band to blend together and form an irresolvable Galactic foreground noise. In addition\, a stochastic gravitational wave background (SGWB) of cosmological origin could add an unknown component to the measured noise. In this talk\, I will assess the bias induced on the parameter estimation of stochastic signals\, arising from the unresolved binaries buried within the cosmological signal. Using a representative SGWB model\, I will quantify the impact of this effect on the reconstruction of the foreground template parameters and\, most importantly\, on those of the SGWB model itself. Neglecting inter-template correlations can lead to significan biases\, and\, for several benchmark cases\, those biases exceed the statistical reconstruction uncertainties. These findings expose a key limitation of existing template-based strategies and indicate that unbiased component separation will likely require additional information\, such as constraints from resolved sources obtained through global-fit analyses.
URL:https://www.ift.uam-csic.es/event/seminar-by-marco-finetti-u-aveiro/
CATEGORIES:Scientific activities,Seminars
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