Talk detail

Participant	Loureiro Benone, Carolina
Institution	Universidade Federal do Pará - Augusto Corrêa Street, 01 - Belém - Pará - Brazil

Session	BH7-8	Accepted	Yes	Order	5	Time	16:45	15'
Talk	Oral abstract	Title	Kerr-Newman scalar clouds
Coauthors	Benone, Carolina L.; Crispino, Luís C. B.; Herdeiro, Carlos; Radu, Eugen
Abstract	Massive complex scalar fields can form bound states around Kerr black holes. These bound states -- dubbed \textit{scalar clouds} -- are generically non-zero and finite on and outside the horizon; they decay exponentially at spatial infinity, have a real frequency and are specified by a set of integer ``quantum'' numbers $(n,\ell,m)$. For a specific set of these numbers, the clouds are only possible along a 1-dimensional subset of the 2-dimensional parameter space of Kerr black holes, called an \textit{existence line}.
Pdf file

Session	AC1	Accepted		Order		Time
Talk	Oral abstract	Title	Absorption of a massive scalar field by a charged black hole
Coauthors	Benone, Carolina L.; Oliveira, Ednilton S. de; Dolan, Sam R.; Crispino, Luís C. B.;
Abstract	We calculate the absorption cross section of a massive neutral scalar field impinging upon a Reissner-Nordstr\"om black hole. First, we derive key approximations in the high- and low-frequency regimes. Next, we develop a numerical method to compute the cross section at intermediate frequencies, and present a selection of results. Finally, we draw together our complementary approaches to give a quantitative full-spectrum description of absorption.
Pdf file

Session	QF2	Accepted	Yes	Order	99	Time
Talk	Poster abstract	Title	Absorption of a massive scalar field by a charged black hole
Coauthors	Benone, Carolina L.; Oliveira, Ednilton S. de; Dolan, Sam R.; Crispino, Luís C. B.;
Abstract	We calculate the absorption cross section of a massive neutral scalar field impinging upon a Reissner-Nordstr\"om black hole. First, we derive key approximations in the high- and low-frequency regimes. Next, we develop a numerical method to compute the cross section at intermediate frequencies, and present a selection of results. Finally, we draw together our complementary approaches to give a quantitative full-spectrum description of absorption.
Pdf file