The Challenges Ahead for Multimessenger Analyses of Gravitational Waves and Kilonova: A Case Study on GW190425 - Archive ouverte HAL
Article Dans Une Revue The Astrophysical Journal Année : 2021

The Challenges Ahead for Multimessenger Analyses of Gravitational Waves and Kilonova: A Case Study on GW190425

Geert Raaijmakers
  • Fonction : Auteur
Samaya Nissanke
  • Fonction : Auteur
Francois Foucart
  • Fonction : Auteur
Mansi M. Kasliwal
  • Fonction : Auteur
Mattia Bulla
  • Fonction : Auteur
Rodrigo Fernandez
  • Fonction : Auteur
Amelia Henkel
  • Fonction : Auteur
Tanja Hinderer
  • Fonction : Auteur
Kenta Hotokezaka
  • Fonction : Auteur
Kamile Lukošiūtė
  • Fonction : Auteur
Tejaswi Venumadhav
  • Fonction : Auteur
Sarah Antier
Michael W. Coughlin
  • Fonction : Auteur
Tim Dietrich
  • Fonction : Auteur
Thomas D.P. Edwards
  • Fonction : Auteur

Résumé

In recent years, there have been significant advances in multimessenger astronomy due to the discovery of the first, and so far only confirmed, gravitational wave event with a simultaneous electromagnetic (EM) counterpart, as well as improvements in numerical simulations, gravitational wave (GW) detectors, and transient astronomy. This has led to the exciting possibility of performing joint analyses of the GW and EM data, providing additional constraints on fundamental properties of the binary progenitor and merger remnant. Here, we present a new Bayesian framework that allows inference of these properties, while taking into account the systematic modeling uncertainties that arise when mapping from GW binary progenitor properties to photometric light curves. We extend the relative binning method presented in Zackay et al. to include extrinsic GW parameters for fast analysis of the GW signal. The focus of our EM framework is on light curves arising from r-process nucleosynthesis in the ejected material during and after merger, the so-called kilonova, and particularly on black hole−neutron star systems. As a case study, we examine the recent detection of GW190425, where the primary object is consistent with being either a black hole or a neutron star. We show quantitatively how improved mapping between binary progenitor and outflow properties, and/or an increase in EM data quantity and quality are required in order to break degeneracies in the fundamental source parameters.

Dates et versions

hal-03171392 , version 1 (16-03-2021)

Identifiants

Citer

Geert Raaijmakers, Samaya Nissanke, Francois Foucart, Mansi M. Kasliwal, Mattia Bulla, et al.. The Challenges Ahead for Multimessenger Analyses of Gravitational Waves and Kilonova: A Case Study on GW190425. The Astrophysical Journal, 2021, 922 (2), pp.269. ⟨10.3847/1538-4357/ac222d⟩. ⟨hal-03171392⟩
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