Fermi-LAT Gamma-ray Emission Discovered from the Composite Supernova Remnant B0453-685 in the Large Magellanic Cloud

Abstract

We report the second extragalactic pulsar wind nebula (PWN) to be detected in the MeV-GeV band by the Fermi-LAT, located within the Large Magellanic Cloud (LMC). The only other known PWN to emit in the Fermi band outside of the Milky Way Galaxy is N 157B which lies to the west of the newly detected gamma-ray emission at an angular distance of 4 degrees. Faint, point-like gamma-ray emission is discovered at the location of the composite supernova remnant (SNR) B0453-685 with a ~ 4 sigma significance from energies 300 MeV - 2 TeV. We present the Fermi-LAT data analysis of the new gamma-ray source, coupled with a detailed multi-wavelength investigation to understand the nature of the observed emission. Combining the observed characteristics of the SNR and the physical implications from broadband modeling, we argue it is unlikely the SNR is responsible for the gamma-ray emission. While the gamma-ray emission is too faint for a pulsation search, we try to distinguish between any pulsar and PWN component of SNR B0453-685 that would be responsible for the observed gamma-ray emission using semi-analytic models. We determine the most likely scenario is that the old PWN (t ~ 14,000 years) within B0453-685 has been impacted by the return of the SNR reverse shock with a possible substantial pulsar component below 5 GeV.

arXiv comment18 pages, 8 figures, accepted for publication in ApJ Feb. 1, 2023

References in corpus (39)

• emcee: The MCMC Hammer
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• On the Absorption of X-rays in the Interstellar Medium
• The ATNF Pulsar Catalogue
• How Massive Single Stars End their Life
• Atomic Data for Astrophysics. II. New Analytic Fits for Photoionization Cross Sections of Atoms and Ions
• Fermi Large Area Telescope Fourth Source Catalog
• Core-Collapse Supernovae from 9 to 120 Solar Masses Based on Neutrino-powered Explosions
• Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
• The Second Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• The Evolution and Structure of Pulsar Wind Nebulae
• Sherpa: a Mission-Independent Data Analysis Application
• The Star Formation History of the Large Magellanic Cloud
• On the magnetic fields and particle acceleration in Cas A
• The 1st Fermi Lat Supernova Remnant Catalog
• Pulsars versus Dark Matter Interpretation of ATIC/PAMELA
• A Dynamical Model for the Evolution of a Pulsar Wind Nebula inside a Non-Radiative Supernova Remnant
• The Explosion of Helium Stars Evolved With Mass Loss
• Using the X-ray Morphologies of Young Supernova Remnants to Constrain Explosion Type, Ejecta Distribution, and Chemical Mixing
• Constraints on the Galactic Population of TEV Pulsar Wind Nebulae Using Fermi Large Area Telescope Observations
• Search for extended sources in the Galactic Plane using 6 years of Fermi-Large Area Telescope Pass 8 data above 10 GeV
• Discovery of 14 radio pulsars in a survey of the Magellanic Clouds
• Typing Supernova Remnants Using X-ray Line Emission Morphologies
• A High-Resolution X-Ray and Optical Study of SN 1006: Asymmetric Expansion and Small-Scale Structure in a Type Ia Supernova Remnant
• Deep view of the Large Magellanic Cloud with 6 years of Fermi-LAT observations
• Supernova Remnants Interacting with Molecular Clouds: X-ray and Gamma-ray Signatures
• Late-time Evolution of Composite Supernova Remnants: Deep Chandra Observations and Hydrodynamical Modeling of a Crushed Pulsar Wind Nebula in SNR G327.1-1.1
• Discovery of a New Pulsar Wind Nebula in the Large Magellanic Cloud
• The Properties of the Progenitor Supernova, Pulsar Wind, and Neutron Star inside PWN G54.1+0.3
• Multi-frequency observations of SNR J0453-6829 in the LMC; A composite supernova remnant with a pulsar wind nebula
• High-Energy Emission from the Composite Supernova Remnant MSH 15-56
• Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N157B with the High Energy Stereoscopic System
• The Impact of Efficient Particle Acceleration on the Evolution of Supernova Remnants in the Sedov-Taylor Phase
• The Nonstandard Properties of a "Standard" PWN: Unveiling the Mysteries of PWN G21.5-0.9 Using its IR and X-ray emission
• X-ray Spectroscopy of the Highly Magnetized Pulsar PSR J1846-0258, its Wind Nebula and Hosting Supernova Remnant Kes 75
• Constraining the origin of the puzzling source HESS J1640-465 and the PeVatron candidate HESS J1641-463 using Fermi-LAT observations
• Discovery of GeV gamma-ray emission from PWN Kes 75 and PSR J1846-0258
• SNR 0453-68.5: An Asymmetric Remnant and its Plerion in the Large Magellanic Cloud
• 2FHL J0826.1-4500: Discovery of a possible shock-cloud interaction on the Western edge of the Vela SNR

Cited by in corpus (1)

• Search for $\gamma$-ray emission from SNRs in the Large Magellanic Cloud: a new cluster analysis at energies above 4 GeV