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Título: XMM-Newton detection of the supernova remnant G304.6+0.1 (Kes 17)
Autor(es): Combi, Jorge A.
Albacete Colombo, Juan Facundo
Sánchez Ayaso, Estrella
Romero, Gustavo E.
Marti, J.
Luque Escamilla, P. L.
Muñoz Arjonilla, A. J.
Sánchez Sutil, J. R.
López Santiago, J.
Fecha de publicación: 13-sep-2010
Editorial: Edp Sciences
Citación: Combi, Jorge A., Albacete Colombo, Juan F., Sánchez Ayaso, Estrella, Romero, Gustavo E., Marti, J. (2010). XMM-Newton detection of the supernova remnant G304.6+0.1 (Kes 17); Edp Sciences; Astronomy And Astrophysics
Revista: Astronomy And Astrophysics
Resumen: Aims. We report the first detailed X-ray study of the supernova remnant (SNR) G304.6+0.1, achieved with the XMM-Newton mission. Methods. The powerful imaging capability of XMM-Newton was used to study the X-ray characteristics of the remnant at different energy ranges. The X-ray morphology and spectral properties were analyzed. In addittion, radio and mid-infrared data obtained with the Molonglo Observatory Synthesis Telescope and the Spitzer Space Telescope were used to study the association with the detected X-ray emission and to understand the structure of the SNR at differents wavelengths. Results. The SNR shows an extended and arc-like internal structure in the X-ray band without a compact point-like source inside the remnant. We find a high column density of NH in the range 2.5–3.5 × 1022 cm−2, which supports a relatively distant location (d ≥ 9.7 kpc). The X-ray spectrum exhibits at least three emission lines, indicating that the X-ray emission has a thin thermal plasma origin, although a non-thermal contribution cannot be discarded. The spectra of three different regions (north, center and south) are well represented by a combination of a non-equilibrium ionization (PSHOCK) and a power-law (PL) model. The mid-infrared observations show a bright filamentary structure along the north-south direction coincident with the NW radio shell. This suggests that Kes 17 is propagating in a non-uniform environment with high density and that the shock front is interacting with several adjacent massive molecular clouds. The good correspondence of radio and mid-infrared emissions suggests that the filamentary features are caused by shock compression. The X-ray characteristics and well-known radio parameters indicate that G304.6+0.1 is a middle-aged SNR (2.8−6.4) × 104 yr old and a new member of the recently proposed group of mixed-morphology SNRs.
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ISSN: 1432-0746
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Este documento es resultado del financiamiento otorgado por el Estado Nacional, por lo tanto queda sujeto al cumplimiento de la Ley N° 26.899