Electromagnetic probes of primordial black holes as dark matter
Abstract
The LIGO discoveries have rekindled suggestions that primordial black holes (BHs) may constitute part to all of the dark matter (DM) in the Universe. Such suggestions came from 1) the observed merger rate of the BHs, 2) their unusual masses, 3) their low/zero spins, and 4) also from the independently uncovered cosmic infrared background (CIB) fluctuations signal of high amplitude and coherence with unresolved cosmic X-ray background (CXB). Here we summarize the prospects to resolve this important issue with electromagnetic observations using the instruments and tools expected in the 2020's. These prospects appear promising to make significant, and potentially critical, advances. We demonstrate that in the next decade, new space- and ground-borne electromagnetic instruments, combined with concurrent theoretical efforts, should shed critical light on the long-considered link between primordial BHs and DM. Specifically the new data and methodologies under this program will involve: I) Probing with high precision the spatial spectrum of source-subtracted CIB with Euclid and WFIRST, and its coherence with unresolved cosmic X-ray background using eROSITA and Athena, II) Advanced searches for microlensing of Galactic stars by the intervening Galactic Halo BHs with OGLE, Gaia, LSST and WFIRST, III) Supernovae (SNe) lensing in the upcoming surveys with WFIRST, LSST and also potentially with Euclid and JWST, IV) Advanced theoretical work to understand the details of PBH accretion and evolution and their influence on cosmic microwave background (CMB) anisotropies in light of the next generation CMB experiments, V) Better new samples and theoretical understanding involving stability and properties of ultra faint dwarf galaxies, pulsar timing, and cosmological quasar lensing.
Keywords
Cite
@article{arxiv.1903.04424,
title = {Electromagnetic probes of primordial black holes as dark matter},
author = {Y. Ali-Haimoud and S. Clesse and J. Garcia-Bellido and A. Kashlinsky and L. Wyrzykowski and A. Achucarro and L. Amendola and J. Annis and A. Arbey and R. G. Arendt and F. Atrio-Barandela and N. Bellomo and K. Belotsky and J-L. Bernal and S. Bird and V. Bozza and C. Byrnes and S. Calchi Novati and F. Calore and B. J. Carr and J. Chluba and I. Cholis and A. Cieplak and P. Cole and I. Dalianis and A-C. Davis and T. Davis and V. De Luca and I. Dvorkin and R. Emparan and J-M. Ezquiaga and P. Fleury and G. Franciolini and D. Gaggero and J. Georg and C. Germani and G-F. Giudice and A. Goobar and G. Hasinger and A. Hector and M . Hundertmark and G. Hutsi and R. Jansen and M. Kamionkowski and M. Kawasaki and D. Kazanas and A. Kehagias and M. Khlopov and A. Knebe and K. Kohri and S. Koushiappas and E. Kovetz and F. Kuhnel and J. MacGibbon and L. Marzola and E. Mediavilla and P. Meszaros and P. Mroz and J. Munoz and I. Musco and S. Nesseris and O. Ozsoy and P. Pani and V. Poulin and A. Raccanelli and D. Racco and M. Raidal and C. Ranc and N. Rattenbury and J. Rhodes and M. Ricotti and A. Riotto and S. Rubin and J. Rubio and E. Ruiz-Morales and M. Sasaki and J. Schnittman and Y. Shvartzvald and R. Street and M. Takada and V. Takhistov and H. Tashiro and G. Tasinato and G. Tringas and C. Unal and Y. Tada and Y. Tsapras and V. Vaskonen and H. Veermae and F. Vidotto and S. Watson and R. Windhorst and S. Yokoyama and S. Young},
journal= {arXiv preprint arXiv:1903.04424},
year = {2019}
}
Comments
Science whitepaper submitted to the Astro2020 Decadal Survey