INVESTIGADORES
COMBI Jorge Ariel
artículos
Título:
XMM-Newton detection of the supernova remnant G304.6+0.1 (Kes 17)
Autor/es:
COMBI, J. A.; ALBACETE COLOMBO, J. F.; SÁNCHEZ-AYASO, E.; ROMERO, G. E.; MARTÍ, J.; LUQUE-ESCAMILLA, P. L.; MUÑOZ-ARJONILLA, A. J.; SÁNCHEZ-SUTIL, J. R.; LÓPEZ-SANTIAGO, J.
Revista:
ASTRONOMY AND ASTROPHYSICS
Editorial:
EDP SCIENCES S A
Referencias:
Lugar: Paris; Año: 2010 vol. 523 p. 76 - 80
ISSN:
0004-6361
Resumen:
Abstract
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 2.53.5 × 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.