[astroseminar at Sapienza] Gravity-theory Webinar: Jan 26th @3pm -David Pereñiguez (Madrid, IFT) - Love Numbers and Magnetic Susceptibility of Charged Black Holes

[Paolo Pani]

Next gravity-theory webinar:

*Speaker: *David Pereñiguez (Madrid, IFT)
*Title: *Love Numbers and Magnetic Susceptibility of Charged Black Holes
*Date:  *Wednesday, January 26th at 3pm CET
*Location: *Zoom (see below)

*Abstract:*
Four-dimensional black holes (BH) of GR do not deform under external
fields. This is a very special result of 4D, and ceases to hold in higher
dimensions. In this talk I will discuss the gravitational and magnetic
response of charged BHs in arbitrary spacetime dimensions D. First, I will
derive exact analytical expressions for the tensor Love numbers in terms of
the BH temperature. These turn out to vanish at extremality. In contrast,
vector Love numbers and magnetic susceptibilities increase significantly as
one approaches the maximally charged limit. I will provide exact analytical
expressions at extremality and solve numerically the finite-temperature and
finite-charge case, obtaining agreement with our results at zero
temperature and those previously known for the neutral limit. In D=4 all
response parameters remain zero at all temperatures. I will conclude by
discussing aspects that could be explored in future work.

The meeting will be on Zoom:
https://uniroma1.zoom.us/j/86496887581?pwd=aVVRRXd2Z3pBbGZObVhEUjVZWjc0UT09
ID meeting: 864 9688 7581
Passcode: cCUG8j

Best,
Paolo

-- 
Paolo Pani
Associate Professor
ERC StG Fellow, DarkGRA project
Junior Fellow, Scuola Superiore di Studi Avanzati Sapienza

Physics Department (Marconi Building), 3rd floor, room 334
Sapienza University of Rome
Piazzale Aldo Moro 5 - 00185 Rome (Italy)
+39 06 4991 4472 (int 24472)
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