Fermi-LAT Detection of the Young SuperNova Remnant Tycho

TL;DR

The Fermi-LAT telescope detected gamma-ray emission from the young Tycho supernova remnant, providing insights into cosmic ray acceleration in this historic supernova event.

Contribution

This is the first gamma-ray detection of Tycho's SNR, offering new observational data on its high-energy emission and particle acceleration processes.

Findings

Gamma-ray flux measured at (3.5±1.1±0.7)×10^{-9} cm^{-2}s^{-1}

Photon index determined as 2.3±0.2±0.1

Detection confirms high-energy particle acceleration in Tycho SNR

Abstract

After almost three years of data taking in sky survey mode, the \emph{Fermi}-LAT has detected $\gamma$-ray emission toward the Tycho's Supernova Remnant (SNR). The Tycho SNR is among the youngest remnants in the Galaxy, originating from a Type Ia Supernova in AD 1572. The $\gamma$-ray integral flux from 400 MeV up to 100 GeV has been measured to be (3.5$\pm1.1_{stat}\pm0.7_{syst}$)$\times10^{-9}$ cm$^{-2}$s$^{-1}$ with a photon index of 2.3$\pm0.2_{stat}\pm0.1_{syst}$.