An X-ray study of the SNR G344.7-0.1 and the central object CXOU J170357.8-414302

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Aims. We report results of an X-ray study of the supernova remnant (SNR) G344.7-0.1 and the point-like X-ray source located at the geometrical center of the SNR radio structure. Methods. The morphology and spectral properties of the remnant and the central X-ray point-like source were studied using...

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Autores principales: Combi, Jorge Ariel, Albacete Colombo, Juan Facundo, López Santiago, J., Romero, Gustavo Esteban, Sánchez Ayaso, E., Martí, J., Luque Escamilla, P. L., Pérez González, P. G., Muñoz Arjonilla, A. J., Sánchez Sutil, J. R.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Astronomía
ISM: individual objects: G344.7-0.1
ISM: supernova remnants
radiation mechanisms: thermal
X-rays: individuals: CXOU J170357.8-414302
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82476
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82476
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
ISM: individual objects: G344.7-0.1
ISM: supernova remnants
radiation mechanisms: thermal
X-rays: individuals: CXOU J170357.8-414302
spellingShingle Astronomía
ISM: individual objects: G344.7-0.1
ISM: supernova remnants
radiation mechanisms: thermal
X-rays: individuals: CXOU J170357.8-414302
Combi, Jorge Ariel
Albacete Colombo, Juan Facundo
López Santiago, J.
Romero, Gustavo Esteban
Sánchez Ayaso, E.
Martí, J.
Luque Escamilla, P. L.
Pérez González, P. G.
Muñoz Arjonilla, A. J.
Sánchez Sutil, J. R.
An X-ray study of the SNR G344.7-0.1 and the central object CXOU J170357.8-414302
topic_facet Astronomía
ISM: individual objects: G344.7-0.1
ISM: supernova remnants
radiation mechanisms: thermal
X-rays: individuals: CXOU J170357.8-414302
description Aims. We report results of an X-ray study of the supernova remnant (SNR) G344.7-0.1 and the point-like X-ray source located at the geometrical center of the SNR radio structure. Methods. The morphology and spectral properties of the remnant and the central X-ray point-like source were studied using data from the XMM-Newton and Chandra satellites. Archival radio data and infrared Spitzer observations at 8 and 24 μm were used to compare and study its multi-band properties at different wavelengths. Results. The XMM-Newton and Chandra observations reveal that the overall X-ray emission of G344.7-0.1 is extended and correlates very well with regions of bright radio and infrared emission. The X-ray spectrum is dominated by prominent atomic emission lines. These characteristics suggest that the X-ray emission originated in a thin thermal plasma, whose radiation is represented well by a plane-parallel shock plasma model (PSHOCK). Our study favors the scenario in which G344.7-0.1 is a 6 × 103 year old SNR expanding in a medium with a high density gradient and is most likely encountering a molecular cloud on the western side. In addition, we report the discovery of a soft point-like X-ray source located at the geometrical center of the radio SNR structure. The object presents some characteristics of the so-called compact central objects (CCO). However, its neutral hydrogen absorption column (NH) is inconsistent with that of the SNR. Coincident with the position of the source, we found infrared and optical objects with typical early-K star characteristics. The X-ray source may be a foreground star or the CCO associated with the SNR. If this latter possibility were confirmed, the point-like source would be the farthest CCO detected so far and the eighth member of the new population of isolated and weakly magnetized neutron stars.
format Articulo
Articulo
author Combi, Jorge Ariel
Albacete Colombo, Juan Facundo
López Santiago, J.
Romero, Gustavo Esteban
Sánchez Ayaso, E.
Martí, J.
Luque Escamilla, P. L.
Pérez González, P. G.
Muñoz Arjonilla, A. J.
Sánchez Sutil, J. R.
author_facet Combi, Jorge Ariel
Albacete Colombo, Juan Facundo
López Santiago, J.
Romero, Gustavo Esteban
Sánchez Ayaso, E.
Martí, J.
Luque Escamilla, P. L.
Pérez González, P. G.
Muñoz Arjonilla, A. J.
Sánchez Sutil, J. R.
author_sort Combi, Jorge Ariel
title An X-ray study of the SNR G344.7-0.1 and the central object CXOU J170357.8-414302
title_short An X-ray study of the SNR G344.7-0.1 and the central object CXOU J170357.8-414302
title_full An X-ray study of the SNR G344.7-0.1 and the central object CXOU J170357.8-414302
title_fullStr An X-ray study of the SNR G344.7-0.1 and the central object CXOU J170357.8-414302
title_full_unstemmed An X-ray study of the SNR G344.7-0.1 and the central object CXOU J170357.8-414302
title_sort x-ray study of the snr g344.7-0.1 and the central object cxou j170357.8-414302
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/82476
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