Constraining Primordial Black Holes with High-energy Astrophysics - PowerPoint PPT Presentation

Constraining Primordial Black Holes with High-energy Astrophysics Francesca Calore CNRS, LAPTh Solvay Workshop THE DARK SIDE OF BLACK HOLES 4 th April 2019 Bruxelles

The astronomical data landscape Ground-based telescopes and space-borne instruments dedicated to detection of electromagnetic radiation, cosmic rays and HE neutrinos s s cosmic rays neutrinos Francesca Calore CNRS, LAPTh 2

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Stellar-mass BH distribution • Stellar-mass BH in X-ray binaries [ arXiv:0111540 ] • GW detection of stellar mass BH with mass as high as 40 M Sun [ Abbott+ PRL’16 ] � 4 Francesca Calore CNRS, LAPTh

High-mass PBH constraints (end ’16) Lensing constraints: Dynamical constraints: * MACHO project [ Allsman+ ApJ’01 ]: micro-lensing * Disruption of wide binaries [ Monroy-Rodriguez+ events towards the Large Magellanic Cloud ApJ'14 ] * EROS project [ Tisserand+ A&A'07 ]: 7-year * Ultra-faint dwarfs [ Brandt ApJ’16 ]: constraint from monitoring millions of bright stars in the LMC and existence of star cluster at the center of Eridanus SMC II A. Green talk Ali-Haïmoud & Kamionkowski PRD’17 Early Universe constraints: * Exploiting accretion of gas onto PBH at very early times [e.g. Ali-Haïmoud & Kamionkowski PRD’17 ] * 21 cm line brightness temperature fluctuations: how PBH do alter the reionisation history Y. Ali-Haïmoud talk [ Gong+JCAP'18 ] � 5 Francesca Calore CNRS, LAPTh

High-mass PBH constraints (end ’16) Lensing constraints: Dynamical constraints: * MACHO project [ Allsman+ ApJ’01 ]: micro-lensing * Disruption of wide binaries [ Monroy-Rodriguez+ events towards the Large Magellanic Cloud ApJ'14 ] * EROS project [ Tisserand+ A&A'07 ]: 7-year * Ultra-faint dwarfs [ Brandt ApJ’16 ]: constraint from monitoring millions of bright stars in the LMC and existence of star cluster at the center of Eridanus SMC II A. Green talk Ali-Haïmoud & Kamionkowski PRD’17 What about gas accretion today? Early Universe constraints: * Exploiting accretion of gas onto PBH at very early times [e.g. Ali-Haïmoud & Kamionkowski PRD’17 ] * 21 cm line brightness temperature fluctuations: how PBH do alter the reionisation history Y. Ali-Haïmoud talk [ Gong+JCAP'18 ] � 5 Francesca Calore CNRS, LAPTh

Gas accretion onto (P)BH - Isolated black holes should all accrete at some level from the local interstellar medium (ISM) - Because of BH gravitational potential the gas inspires towards the event horizon and heats up, emitting non-thermal X rays - In the presence of a jet, radio emission from synchrotron emission is expected. Emission mechanisms targeted by traditional searches for astrophysical stellar-mass BH Fender+ MNRAS’13 Idea : can we look for (P)BH candidates accreting today in radio and X-ray point-source catalogues Gaggero, FC+ PRL’17 Hektor+A&A’18, Manshanden+ 1812.07967 � 6 Francesca Calore CNRS, LAPTh