TY - JOUR
T1 - Constraining primordial black holes using fast radio burst gravitational-lens interferometry with CHIME/FRB
AU - Leung, Calvin
AU - Kader, Zarif
AU - Masui, Kiyoshi W.
AU - Dobbs, Matt
AU - Michilli, Daniele
AU - Mena-Parra, Juan
AU - McKinven, Ryan
AU - Ng, Cherry
AU - Bandura, Kevin
AU - Bhardwaj, Mohit
AU - Brar, Charanjot
AU - Cassanelli, Tomas
AU - Chawla, Pragya
AU - Dong, Fengqiu Adam
AU - Good, Deborah
AU - Kaspi, Victoria
AU - Lanman, Adam E.
AU - Lin, Hsiu Hsien
AU - Meyers, Bradley W.
AU - Pearlman, Aaron B.
AU - Pen, Ue Li
AU - Petroff, Emily
AU - Pleunis, Ziggy
AU - Rafiei-Ravandi, Masoud
AU - Rahman, Mubdi
AU - Sanghavi, Pranav
AU - Scholz, Paul
AU - Shin, Kaitlyn
AU - Siegel, Seth
AU - Smith, Kendrick M.
AU - Stairs, Ingrid
AU - Tendulkar, Shriharsh P.
AU - Vanderlinde, Keith
N1 - Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/8/15
Y1 - 2022/8/15
N2 - Fast radio bursts (FRBs) represent an exciting frontier in the study of gravitational lensing, due to their brightness, extragalactic nature, and the compact, coherent characteristics of their emission. In a companion work [43Z. Kader and C. Leung, Phys. Rev. D 106, 043016 (2022).PRVDAQ2470-0010], we use a novel interferometric method to search for gravitationally lensed FRBs in the time domain using bursts detected by CHIME/FRB. There, we dechannelize and autocorrelate electric field data at a time resolution of 1.25 ns. This enables a search for FRBs whose emission is coherently deflected by gravitational lensing around a foreground compact object such as a primordial black hole (PBH). Here, we use our nondetection of lensed FRBs to place novel constraints on the PBH abundance outside the Local Group. We use a novel two-screen model to take into account decoherence from scattering screens in our constraints. Our constraints are subject to a single astrophysical model parameter-The effective distance between an FRB source and the scattering screen, for which we adopt a fiducial distance of 1 pc. We find that coherent FRB lensing is a sensitive probe of sub-solar mass compact objects. Having observed no lenses in 172 bursts from 114 independent sightlines through the cosmic web, we constrain the fraction of dark matter made of compact objects, such as PBHs, to be fâ 0.8, if their masses are ∼10-3 M.
AB - Fast radio bursts (FRBs) represent an exciting frontier in the study of gravitational lensing, due to their brightness, extragalactic nature, and the compact, coherent characteristics of their emission. In a companion work [43Z. Kader and C. Leung, Phys. Rev. D 106, 043016 (2022).PRVDAQ2470-0010], we use a novel interferometric method to search for gravitationally lensed FRBs in the time domain using bursts detected by CHIME/FRB. There, we dechannelize and autocorrelate electric field data at a time resolution of 1.25 ns. This enables a search for FRBs whose emission is coherently deflected by gravitational lensing around a foreground compact object such as a primordial black hole (PBH). Here, we use our nondetection of lensed FRBs to place novel constraints on the PBH abundance outside the Local Group. We use a novel two-screen model to take into account decoherence from scattering screens in our constraints. Our constraints are subject to a single astrophysical model parameter-The effective distance between an FRB source and the scattering screen, for which we adopt a fiducial distance of 1 pc. We find that coherent FRB lensing is a sensitive probe of sub-solar mass compact objects. Having observed no lenses in 172 bursts from 114 independent sightlines through the cosmic web, we constrain the fraction of dark matter made of compact objects, such as PBHs, to be fâ 0.8, if their masses are ∼10-3 M.
UR - https://www.scopus.com/pages/publications/85136623798
U2 - 10.1103/PhysRevD.106.043017
DO - 10.1103/PhysRevD.106.043017
M3 - Article
AN - SCOPUS:85136623798
SN - 2470-0010
VL - 106
JO - Physical Review D
JF - Physical Review D
IS - 4
M1 - 043017
ER -