Kinematics of the Galactic SNR G109.1-1.0 (CTB 109)

Abstract

We present direct images in the H$\alpha$ and [SII]$\lambda \lambda$6717,6731 $\text{A˚}$ lines of the Galactic Supernova Remnant G109.1-1.0 (CTB 109). We confirm that the filaments detected are the optical counterpart of the X-ray and radio supernova remnant due to their high [SII]/H$\alpha$ line-ratios. We study for the first time the kinematics of the optical counterpart of SNR CTB 109 using the UNAM scanning Fabry-Perot interferometer PUMA. We estimate a systemic velocity of V${}_{LSR}$=-50$\pm$6 km s${}^{-1}$ for this remnant and an expansion velocity of V${}_{exp}$=230$\pm$5 km s${}^{-1}$. From this velocity value and taking into account previous studies about the kinematics of objects at that Galactic longitude we derive a distance to the SNR CTB 109 of 3.1$\pm$0.2 kpc, locating it in the Perseus arm. Using the [SII]$\lambda$6717/[SII]$\lambda$6731 line-ratio we find an electronic density value around n${}_e$= 580 cm${}^{-3}$. Considering that this remnant is evolving in a low density medium with higher density cloudlets responsible of the optical emission, we determine the age and energy deposited in the ISM by the supernova explosion (E${}_0$) in both the Sedov-Taylor phase and the radiative phase. For both cases the age is of thousands of years and the E${}_0$ is rather typical of SNRs containing simple pulsars so that, the energy released to the ISM cannot be used to distinguish between supernova remnants hosting typical pulsars from those hosting powerful magnetars as in the case of CTB 109.

14 pages, 8 Figures, Accepted for publication in MNRAS

References in corpus (7)

• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• The strongest cosmic magnets: Soft Gamma-ray Repeaters and Anomalous X-ray Pulsars
• Kinematic Distances to Molecular Clouds identified in the Galactic Ring Survey
• Distances to Anomalous X-ray Pulsars using Red Clump Stars
• Pulsar Braking Indices, Glitches and Energy Dissipation In Neutron Stars
• Evidence for Shocked Molecular Gas in the Galactic SNR CTB 109 (G109.1-1.0)
• Supernova remnants with magnetars: clues to magnetar formation

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