MULTIMESSENGER IMPLICATIONS OF BNS DETECTIONS GERGELY D LYA ELTE - PowerPoint PPT Presentation

MULTIMESSENGER IMPLICATIONS OF BNS DETECTIONS GERGELY D Á LYA ELTE Dept. of Atomic Physics ELFT Astroparticle Summer School 09/06/2018

MULTIMESSENGER ASTRONOMY

ANATOMY OF A BNS MERGER

WHAT ABOUT NEUTRINOS? May accelerate cosmic rays to high energies --> GeV-EeV neutrinos IceCube Pierre Auger Observatory ANTARES

WHAT ABOUT NEUTRINOS? Detection of neutrinos: restrict E dissipation mechanisms & hadronic densities No coincident neutrino was found in the end...

TESTING KILONOVA MODELS Rapid decline in the bluest bands

BLACKBODY FITS Photometric fit Spectroscopic fit

TESTING KILONOVA MODELS "Blue" kilonova Contains Fe-group or light r-process nuclei Peak at optical wavelengths Short timescale: ~ 1 day "Red" kilonova A>140 heavy lanthanide elements Peak at NIR wavelengths Longer timescale: ~ 1 week Two-component ejecta models fit the data

TESTING KILONOVA MODELS II Single-component ejecta model?

TESTING KILONOVA MODELS II

R-PROCESS ELEMENTS

R-PROCESS ELEMENTS Red: all r-process element in the Solar system is created by BNS mergers!

H0 TENSION

STANDARD SIREN MEASUREMENT GW: distance, EM: recession velocity -- does not require a ladder!

STANDARD SIREN MEASUREMENT GW polarization --> binary inclination; thanks to Virgo!

STATISTICAL H0

STATISTICAL H0

STATISTICAL H0 Question of weighting -- B magnitude or stellar mass?

BNS MERGER RATES Total stochastic background from BNS ~ from BBH They should be detectable at design sensitivity

REMNANT SCENARIOS 1) Prompt collapse to BH 2) Long-term stable NS 3) Supermassive NS --> collapse to BH We have no idea!