SIMBAD references

2003ApJ...589..253B - Astrophys. J., 589, 253-260 (2003/May-3)

Diffuse hard X-ray sources discovered with the ASCA galactic plane survey.


Abstract (from CDS):

We found diffuse hard X-ray sources G11.0+0.0, G25.5+0.0, and G26.6-0.1 in the ASCA Galactic plane survey data. The X-ray spectra are featureless with no emission line and are fitted with both models of a thin thermal plasma in nonequilibrium ionization and a power-law function. The source distances are estimated to be 1-8 kpc, using the best-fit NHvalues under the assumption that the mean density in the line of sight is 1 H cm–3. The source sizes and luminosities are then 4.5-27 pc and (0.8-23)x1033 ergs/s. Although the source sizes are typical for supernova remnants (SNR) with young-to-intermediate ages, the X-ray luminosity, plasma temperature, and weak emission lines in the spectra are all unusual. This suggests that these objects are either shell-like SNRs dominated by X-ray synchrotron emission, like SN 1006 or, alternatively, plerionic SNRs. The total number of these classes of SNRs in our Galaxy is also estimated.

Abstract Copyright:

Journal keyword(s): Acceleration of Particles - ISM: Individual: Alphanumeric: G11.0+0.0 - ISM: individual (G25.5+0.0, G26.6-0.1) - ISM: Supernova Remnants - X-Rays: ISM

CDS comments: Table 5: Numbering 'NN' in first column not used in SIMBAD.

Simbad objects: 27

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