Chandra Observations of a Non-Thermal Supernova Remnant Candidate AX J1843.8-0352 and its Surroundings

Abstract

We present the Chandra results of AX J1843.8-0352, a supernova remnant (SNR) recently identified with ASCA. Chandra spatially resolved two components from this SNR: non-thermal and thermal ones. The morphology of the non-thermal component is clumpy and elliptical, elongated from the north to the south with a mean diameter of about 9 arcmin. The spectrum is fitted with a power-law model of photon index 2.1 and the east rim is associated with the non-thermal radio sources C and F (Helfand et al. 1989). Therefore the non-thermal component is probably synchrotron X-rays by energetic electrons accelerated at the shell of the SNR. The thermal component is the brightest clump located within the non-thermal component and shows a spectrum of a thin plasma of about 0.7 keV temperature. Notable discovery is its peculiar morphology; a head of 50 arcsec x 30 arcsec size near the south-east rim of the SNR and a 30 arcsec-long ``jet'' pointing to the southwest. Although this emission is associated with the west part of the radio source F, the absorption is twice larger than that of the non-thermal X-rays, or the bulk of the SNR emission. Therefore, it is unclear whether this peculiar plasma is a thermal component associated with AX J1843.8-0352, a Galactic source located in the far side of our Galaxy, or an extragalactic source.

arXiv comment19 pages, 5 figures; to appear in ApJ

References in corpus (10)

• A Wavelet-Based Algorithm for the Spatial Analysis of Poisson Data
• Supernova Remnants in the Sedov Expansion Phase: Thermal X-Ray Emission
• X-Ray Emission From the Shell-Type SNR G347.3-0.5
• Discovery of Non Thermal X-Rays from the Northwest Shell of the New SNR RX J1713.7-3946: The Second SN1006 ?
• Discovery of TeV Gamma Rays from SN1006: Further Evidence for the SNR Origin of Cosmic Rays
• RXJ 0852.0-0462: Another Nonthermal Shell-Type SNR (G266.2-1.2)
• Origin of the Hard X-ray Emission from the Galactic Plane
• Separating Thermal and Nonthermal X-Rays in Supernova Remnants I: Total Fits to SN 1006 AD
• A Diffuse X-Ray Source, AX J1843.8-0352: Association with the Radio Complex G28.6-0.1 and Identification of a New Supernova Remnant
• Chandra deep X-ray observation on the Galactic plane

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