A high resolution HI study towards the supernova remnant Puppis A and its environments

Abstract

We observed the supernova remnant (SNR) Puppis A in the 21 cm line with the Australia Telescope Compact Array with the aim of determining the systemic velocity and, hence, the corresponding kinematic distance. For the compact, background sources in the field, we obtain absorption spectra by applying two methods: (a) subtracting profiles on- and off-source towards continuum emission, and (b) filtering short spacial frequencies in the Fourier plane to remove large scale emission. One of the brightest features to the East of the shell of Puppis A was found to be a background source, probably extragalactic. Removing the contribution from this and the previously known unrelated sources, the systemic velocity of Puppis A turns out to be limited between 8 and 12 km s${}^{-1}$, which places this source at a distance of 1.3 $\pm$ 0.3 kpc. From the combined images that include both single dish and interferometric data, we analyze the distribution of the interstellar hydrogen. We suggest that an ellipsoidal ring at $v\sim$+8 km s${}^{-1}$ could be the relic of a bubble blown by the progenitor of Puppis A, provided the distance is $\lesssim$ 1.2 kpc. The main consequences of the new systemic velocity and distance as compared with previous publications ($v=$ +16 km s${}^{-1}$ and $d=$2.2 kpc) are the absence of a dense interacting cloud to the East to explain the morphology, and the decrease of the shell size and the neutron star velocity, which are now in better agreement with statistical values.

Accepted for publication in Monthly Notices of the Royal Astronomical Society

References in corpus (6)

• Discovery of a 112 ms X-ray Pulsar in Puppis A: Further Evidence of Neutron Stars Weakly Magnetized at Birth
• Pseudo Three-dimensional Maps of the Diffuse Interstellar Band at 862 nm
• X-ray Emitting Ejecta in Puppis A Observed with Suzaku
• Direct Measurement of Neutron-Star Recoil in the Oxygen-Rich Supernova Remnant Puppis A
• Calibration of the AKARI Far-infrared All Sky Survey Maps
• High resolution CO observations towards the Bright Eastern Knot of the SNR Puppis A

Cited by in corpus (23)

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• Time evolution of broadband non-thermal emission from supernova remnants in different circumstellar environments
• Rectangular core-collapse supernova remnants: application to Puppis A
• A search for runaway stars in twelve Galactic supernova remnants
• Molecular and Atomic Clouds Associated with the Gamma-Ray Supernova Remnant Puppis A
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• Measuring the Non-Axially-Symmetric Surface Temperature Distribution of the Central Compact Object in Puppis A
• Probing the origin of 4FGL J0822.8-4207: cosmic ray illumination from the SNR Puppis A and the Herbig-Haro object HH219
• Molecular environments of the supernova remnant G359.1-0.5
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• Evidence for protons accelerated and escaped from the Puppis A region using \textit{Fermi}-LAT observations
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