LISA Symposium 2026 - Plenary 4 @LISAcommunity

Uploaded August 2026 | Updated September 2026, 2 hours ago

(Recorded on June 23, 2026)

Welcome to the fourth plenary session for the 16th LISA Symposium!

Presentations in this session:
00:00:20 - Astrophysical Environmental Effects in Extreme-Mass-Ratio Inspirals - Francisco Duque
00:33:30 - Challenges and Strategies for Telescope Follow-up of LISA MBHB Mergers - John Ruan
01:02:10 - LECS Update - Deborah Ferguson

Session Chair: Tamara Bogdanovic

$Searching for primordial black holes with stochastic gravitational-wave background Searching for primordial black holes with stochastic gravitational-wave background Yi-Fan Wang, Qing-Guo Huang,Tjonnie G.F. Li,Shihong Liao Assuming that primordial black holes compose a fraction of dark matter, some of them may accumulate at the center of galaxy and perform a prograde or retrograde orbit against the gravity pointing towards the center exerted by the central massive black hole. If the mass of primordial black holes is of the order of stellar mass or smaller, such extreme mass ratio inspirals can emit gravitational waves and form a background due to incoherent superposition of all the contributions of the Universe. We investigate the stochastic gravitational-wave background energy density spectra from the directional source, the primordial black holes surrounding Sagittarius A of the Milky Way, and the isotropic extragalactic total contribution, respectively. As will be shown, the resultant stochastic gravitational-wave background energy density shows different spectrum features such as the peak positions in the frequency domain for the above two kinds of sources. Detection of stochastic gravitational-wave background with such a feature may provide evidence for the existence of primordial black holes. Conversely, a null searching result can put constraints on the abundance of primordial black holes in dark matter.$

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