New insights into the WR nebula M1-67 with SITELLE

Abstract

We present a detailed study of M1-67, a well-known nebula around the population I Wolf-Rayet star WR 124 (WNh 8), based on datacubes obtained with the imaging Fourier transform spectrometer SITELLE at the Canada-France-Hawaii Telescope (CFHT). This allowed us to reconstruct detailed emission-line ratio maps that highlight clear orthogonal features from a chemical abundance point of view, a complete extinction map, as well as the electron density and temperature structures. In addition to this information, velocity maps were obtained shedding light on the bow shock structure due to the high velocity of WR124, qualified as a runaway star, which is about +190\,km\,s${}^{-1}$ relative to the local ISM. Interaction between the latter structure and spherical and non-spherical outburst could explain the global morphology of M1-67.

13 pages, 16 figures, 4 tables

References in corpus (6)

• Physical Properties of Wolf-Rayet Stars
• PyNeb: a new tool for analyzing emission lines. I. Code description and validation of results
• The Galactic WN stars: Spectral analyses with line-blanketed model atmospheres versus stellar evolution models with and without rotation
• Unlocking Galactic Wolf-Rayet stars with $\text{Gaia}$ DR2 I: Distances and absolute magnitudes
• Optimal fitting of gaussian-apodized or under-resolved emission lines in Fourier Transform spectra providing new insights on the velocity structure of NGC 6720
• A SITELLE view of M31's central region - I: Calibrations and radial velocity catalogue of nearly 800 emission-line point-like sources

Cited by in corpus (2)

• Dense Molecular Environments of B[e] Supergiants and Yellow Hypergiants
• 3D mapping of the Wolf-Rayet nebula M1-67: clues for post-common envelope evolution in massive stars