Follow-up of Neutron Star Mergers with CTA and Prospects for Joint Detection with Gravitational-Wave Detectors

Abstract

The joint gravitational wave (GW) and electromagnetic observations of the binary neutron star (BNS) merger GW170817 marked a giant leap in multi-messenger astrophysics. The extensive observation campaign of the associated Gamma-Ray Burst (GRB) and its afterglow has strengthened the hypothesis associating GRBs with BNS mergers and provided insights on mass ejection, particularly the relativistic outflow launched in BNS mergers. In this paper, we investigate the joint detection probabilities of BNS mergers by GW detectors and the upcoming ground-based very-high-energy (VHE) $\gamma$-ray instrument, the Cherenkov Telescope Array (CTA). Using an empirical relation that constrains the distance-inclination angle plane, we simulated BNS mergers detectable in the O5 run of the LIGO/Virgo/Kagra (LVK) network with $300$~Mpc BNS horizon. Assuming Gaussian structured jets and ignoring large sky localization challenges of GW detectors, we estimated VHE afterglow detection probability by CTA. We have explored the afterglow parameter space to identify conditions favourable for detecting synchrotron self-Compton emission by CTA. Our study reveals that events viewed at angles $\lesssim 3$ times the jet core angle are detectable by CTA when the initial bulk Lorentz factor at the jet axis ranges between 100 and 800. We find high kinetic energy ($E_k>10^{50}$ erg), ambient density ($n_0>10^{-1}$ $c{m}^{-3}$), and energy content in non-thermal electrons significantly enhance the likelihood of CTA detection within 300 Mpc. The joint detection rate varies significantly with afterglow parameter distributions, ranging from $0.003$ to $0.5$ per year.

arXiv comment16 pages, 8 figures

References in corpus (74)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Spectra and Light Curves of Gamma-Ray Burst Afterglows
• Gravitational Waves from Mergin Compact Binaries: How Accurately Can One Extract the Binary's Parameters from the Inspiral Waveform?
• An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi-GBM Detection of GRB 170817A
• Gamma-Ray Bursts as the Death Throes of Massive Binary Stars
• Discovery of the X-Ray Afterglow of the Gamma-Ray Burst of February 28 1997
• The Physics of Gamma-Ray Bursts and Relativistic Jets
• INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational Wave Event GW170817
• The X-ray counterpart to the gravitational wave event GW 170817
• Observing binary inspiral in gravitational radiation: One interferometer
• Extragalactic Background Light Inferred from AEGIS Galaxy SED-type Fractions
• Superluminal motion of a relativistic jet in the neutron star merger GW170817
• Modeling the Extragalactic Background Light from Stars and Dust
• A Radio Counterpart to a Neutron Star Merger
• Semi-analytic modeling of the EBL and consequences for extragalactic gamma-ray spectra
• On The Synchrotron Self-Compton Emission from Relativistic Shocks and Its Implications for Gamma-Ray Burst Afterglows
• Formation Rates of Black Hole Accretion Disk Gamma-Ray Bursts
• Physical parameters of GRB 970508 and GRB 971214 from their afterglow synchrotron emission
• The afterglow, the redshift, and the extreme energetics of the gamma-ray burst 990123
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. V. Rising X-ray Emission from an Off-Axis Jet
• Compact radio emission indicates a structured jet was produced by a binary neutron star merger
• A mildly relativistic wide-angle outflow in the neutron star merger GW170817
• Late time afterglow observations reveal a collimated relativistic jet in the ejecta of the binary neutron star merger GW170817
• Off-Axis Afterglow Emission from Jetted Gamma-Ray Bursts
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. VI. Radio Constraints on a Relativistic Jet and Predictions for Late-Time Emission from the Kilonova Ejecta
• Gamma-ray burst beaming: a universal configuration with a standard energy reservoir?
• A very-high-energy component deep in the Gamma-ray Burst afterglow
• The Imprint of The Extragalactic Background Light in the Gamma-Ray Spectra of Blazars
• The outflow structure of GW170817 from late time broadband observations
• The Evolution of a Structured Relativistic Jet and GRB Afterglow Light-Curves
• Gamma-Ray Burst Afterglows In The Multi-Messenger Era: Numerical Models and Closure Relations
• Science with the Cherenkov Telescope Array
• High Energy Spectral Components in Gamma-Ray Burst Afterglows
• Observation of inverse Compton emission from a long $\gamma$-ray burst
• A Deep Chandra X-ray Study of Neutron Star Coalescence GW170817
• Klein-Nishina Effects on Optically Thin Synchrotron and Synchrotron Self-Compton Spectrum
• Gravitational waves from coalescing binaries: detection strategies and Monte Carlo estimation of parameters
• The cocoon emission - an electromagnetic counterpart to gravitational waves from neutron star mergers
• The evolution of the X-ray afterglow emission of GW 170817 / GRB 170817A in XMM-Newton observations
• Electromagnetic Counterparts to Structured Jets from Gravitational Wave Detected Mergers
• A year in the life of GW170817: the rise and fall of a structured jet from a binary neutron star merger
• Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow
• The polarisation of afterglow emission reveals GRB jet structure
• The optical afterglow of GW170817 at one year post-merger
• A Strong Jet Signature in the Late-Time Lightcurve of GW170817
• A long-lived neutron star merger remnant in GW170817: constraints and clues from X-ray observations
• Numerical simulations of the jet dynamics and synchrotron radiation of binary neutron star merger event GW170817/GRB170817A
• High Energy Afterglow from Gamma-ray Bursts
• Low frequency view of GW 170817/GRB 170817A with the Giant Meterwave Radio Telescope
• A thousand days after the merger: continued X-ray emission from GW170817
• The onset of the GeV afterglow of GRB 090510
• Very high energy gamma-ray emission beyond 10 TeV from GRB 221009A
• Gravitational-wave constraints on the equatorial ellipticity of millisecond pulsars
• Implications of the radio and X-ray emission that followed GW170817
• The Prompt Gamma-Ray and Afterglow Energies of Short-Duration Gamma-Ray Bursts
• Very Strong TeV Emission as Gamma-Ray Burst Afterglows
• TeV gamma-ray observations of the binary neutron star merger GW170817 with H.E.S.S
• Joint gravitational wave -- gamma-ray burst detection rates in the aftermath of GW170817
• MAGIC observations of the nearby short gamma-ray burst GRB 160821B
• ALMA and GMRT constraints on the off-axis gamma-ray burst 170817A from the binary neutron star merger GW170817
• A leptonic-hadronic model for the afterglow of gamma-ray burst 090510
• GW170817 4.5 years after merger: Dynamical ejecta afterglow constraints
• Modelling synchrotron and synchrotron self-Compton emission of gamma-ray burst afterglows from radio to very-high energies
• Modeling Synchrotron Self-Compton and Klein-Nishina Effects in Gamma-Ray Burst Afterglows
• Pre-merger alert to detect the very-high-energy prompt emission from binary neutron-star mergers: Einstein Telescope and Cherenkov Telescope Array synergy
• Inverse Compton Signatures of Gamma-Ray Burst Afterglows
• Radio afterglows of binary neutron star mergers: a population study for current and future gravitational wave observing runs
• MAGIC detection of GRB 201216C at $z=1.1$
• Analytic Modeling of Synchrotron-Self-Compton Spectra: Application to GRB 190114C
• Ground-based gamma-ray astronomy: history and development of techniques
• Probing the magnetic field in the GW170817 outflow using H.E.S.S. observations
• Gravitational-wave follow-up with CTA after the detection of GRBs in the TeV energy domain
• Very High Energy Afterglow of Structured Jets: GW 170817 and Prospects for Future Detections
• Probing Gamma-Ray Burst afterglows with the Cherenkov Telescope Array

Cited by in corpus (1)

• Chasing Gamma-Ray Signals from Binary Neutron Star Coalescences with the Cherenkov Telescope Array: Prospects and Observing Strategies