Molecular and Atomic Clouds Associated with the Gamma-Ray Supernova Remnant Puppis A

Abstract

We have carried out a study of the interstellar medium (ISM) toward a shell-like supernova remnant SNR Puppis A by using the NANTEN CO and ATCA HI data. We synthesized a comprehensive picture of the SNR radiation by combining the ISM data with the gamma-ray and X-ray distributions. The ISM, both atomic and molecular gas, is dense and highly clumpy, and is distributed all around the SNR, but mainly in the north-east. The CO distribution revealed an enhanced line intensity ratio of CO($J$ = 2-1)/($J$ = 1-0) transitions as well as CO line broadening, which indicate shock heating/acceleration. The results support that Puppis A is located at 1.4 kpc, in the local arm. The ISM interacting with the SNR has a large mass of $\sim$10${}^4$ $M_{\odot }$ which is dominated by HI, showing good spatial correspondence with the Fermi-LAT gamma-ray image. This favors the hadronic origin of the gamma-rays, while additional contribution of the leptonic component is not excluded. The distribution of the X-ray ionization timescales within the shell suggests that the shock front ionized various parts of the ISM at epochs ranging over a few to ten 1000 yr. We therefore suggest that the age of the SNR is around 10${}^4$ yr as given by the largest ionization timescale. We estimate the total cosmic ray energy $W_{\mathrm{p}}$ to be 10${}^{47}$ erg, which is well placed in the cosmic-ray escaping phase of an age-$W_{\mathrm{p}}$ plot including more than ten SNRs.

arXiv comment17 pages, 12 figures, accepted for publication in The Astrophysical Journal (ApJ)

References in corpus (38)

• Planck 2013 results. XI. All-sky model of thermal dust emission
• The Aao/Ukst Supercosmos H-alpha Survey (SHS)
• A detailed spectral and morphological study of the gamma-ray supernova remnant RX J1713.7-3946 with H.E.S.S
• Broad-band nonthermal emission from molecular clouds illuminated by cosmic rays from nearby supernova remnants
• The Tully-Fisher relations of early-type spiral and S0 galaxies
• Changes Of Dust Opacity With Density in the Orion A Molecular Cloud
• A Detailed Study of the Molecular and Atomic Gas Toward the γ-ray SNR RX J1713.7-3946: Spatial TeV γ-ray and ISM Gas Correspondence
• Space- and Ground-Based Gamma-Ray Astrophysics
• Optically thick HI dominant in the local interstellar medium; an alternative interpretation to "dark gas"
• Star Forming Dense Cloud Cores in the TeV γ-ray SNR RX J1713.7-3946
• Chandra X-ray Observation of a Mature Cloud-Shock Interaction in the Bright Eastern Knot Region of Puppis A
• The Proper Motion of the Central Compact Object RX J0822-4300 in the Supernova Remnant Puppis A
• X-ray Emitting Ejecta in Puppis A Observed with Suzaku
• Non-thermal X-rays and interstellar gas toward the γ-ray supernova remnant RX J1713.7-3946: Evidence for X-ray enhancement around CO and HI clumps
• Observations of the neutral hydrogen surrounding the radio quiet neutron star RX J0822-4300 in Puppis A
• X-ray observations of RX J0822-4300 and Puppis-A
• High-Resolution X-Ray Spectroscopy of the Galactic Supernova Remnant Puppis A with the XMM-Newton RGS
• A high resolution HI study towards the supernova remnant Puppis A and its environments
• A detailed study of the interstellar protons toward the TeV $\gamma$-ray SNR RX J0852.0$-$4622 (G266.2$-$1.2, Vela Jr.); a third case of the $\gamma$-rays and ISM spatial correspondence
• HI, CO, and Dust in the Perseus Cloud
• Discovery of Fast-Moving X-Ray--Emitting Ejecta Knots in the Oxygen-Rich Supernova Remnant Puppis A
• IRAM-30m large scale survey of ${}^{12}$CO(2-1) and ${}^{13}$CO(2-1) emission in the Orion molecular cloud
• Discovery of Molecular and Atomic Clouds Associated with the Magellanic Superbubble 30 Doradus C
• The most complete and detailed X-ray view of the SNR Puppis A
• ALMA CO Observations of the Mixed-Morphology Supernova Remnant W49B: Efficient Production of Recombining Plasma and Hadronic Gamma-rays via Shock-Cloud Interactions
• Pursuing the origin of the gamma rays in RX J1713.7$-$3946 quantifying the hadronic and leptonic components
• ALMA CO Observations of Gamma-Ray Supernova Remnant N132D in the Large Magellanic Cloud: Possible Evidence for Shocked Molecular Clouds Illuminated by Cosmic-Ray Protons
• The Proper Motion of the Central Compact Object RX J0822-4300 in the Supernova Remnant Puppis A, Revisited
• Dynamics of X-Ray-Emitting Ejecta in the Oxygen-Rich Supernova Remnant Puppis A Revealed by the XMM-Newton RGS
• The SNR Puppis A Revisited with Seven Years of Fermi Large Area Telescope Observations
• ALMA CO Observations of Supernova Remnant N63A in the Large Magellanic Cloud: Discovery of Dense Molecular Clouds Embedded within Shock-Ionized and Photoionized Nebulae
• An Expanding Shell of Neutral Hydrogen Associated with SN 1006: Hints for the Single-Degenerate Origin and Faint Hadronic Gamma-Rays
• High resolution CO observations towards the Bright Eastern Knot of the SNR Puppis A
• Discovery of a Wind-Blown Bubble Associated with the Supernova Remnant G346.6-0.2: A Hint for the Origin of Recombining Plasma
• New perspectives on the supernova remnant Puppis A based on a radio polarization study
• Feature-tailored spectroscopic analysis of the SNR Puppis A in X-rays
• A global view of shocked plasma in the supernova remnant Puppis A provided by SRG/eROSITA
• Probing the origin of 4FGL J0822.8-4207: cosmic ray illumination from the SNR Puppis A and the Herbig-Haro object HH219

Cited by in corpus (2)

• Absorption Line Observations of H${}_3^{+}$ and CO in Sight Lines Toward the Vela and W28 Supernova Remnants
• Evidence for protons accelerated and escaped from the Puppis A region using \textit{Fermi}-LAT observations