Dark supernova remnant

Abstract

An almost perfect round hole of CO-line emission with a diameter of 3.7 pc was found in a molecular cloud (MC) centered on G35.75-0.25 ($l=35^{\circ }.75,b=-0^{\circ }.25$) at radial velocity of 28 km s${}^{-1}$. The hole is quiet in radio continuum emission, unlike the usual supernova remnants (SNR), and the molecular edge is only weakly visible in 8 and 24 $\mu$m dust emissions. The hole may be either a fully evolved molecular bubble around a young stellar object (YSO), or a relic of a radio-quiet SNR that has already stopped expansion after rapid evolution in the dense MC as a buried SNR. Because G35.75 exhibits quite different properties from YSO-driven bubbles of the same size, we prefer the latter interpretation. Existence of such a "dark" SNR would affect the estimation of the supernova rate, and therefore the star formation history in the Galaxy.

PASJ Letters, accepted, 5 pages, 6 figures

References in corpus (5)

• The VLA Galactic Plane Survey
• FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45-m telescope (FUGIN) I: Project Overview and Initial Results
• Supernova feedback and the energy deposition in molecular clouds
• CO-to-H${}_2$ Conversion and Spectral Column Density in Molecular Clouds: The Vriability of $X_{\mathrm{CO}}$ Factor
• Diagnostics of Gaseous Halo of the Milky Way by a Shock Wave from the Galactic Centre

Cited by in corpus (3)

• ALMA CO Observations of the Mixed-Morphology Supernova Remnant W49B: Efficient Production of Recombining Plasma and Hadronic Gamma-rays via Shock-Cloud Interactions
• Asymmetric eROSITA bubbles as the evidence of a circumgalactic medium wind
• Supernova dust destruction in the magnetized turbulent ISM