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Figure 1: M 87 surface brightness map, from all three EPIC detectors vignetting corrected and combined, in the 0.5-7.5 keV energy range. |
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Figure 2: Temperature map obtained from spectral analysis, using a binning to SNR of 100. |
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Figure 3: Abundance map obtained from spectral analysis, using a binning to SNR of 100. |
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Figure 4: Data points and corresponding smooth radial model by which the entropy and pressure maps were divided in order to reveal small deviations from spherical symmetry. |
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Figure 5: Entropy deviations from a smooth radially symmetric model. The E and SW arms, as well as the low-entropy feature close to the NW of the core are seen in dark blue. The entropy edge to the SW is marked by the sharp green to yellow transition. A NW/SE asymmetry is easily seen in the map. |
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Figure 6:
Pressure deviations from a smooth radially symmetric model. A relative pressure increase towards the SE and NW suggests an overall ellipticity in the pressure. A pressure decrease is found in the direction of the E and SW arms, which rise perpendicular to the SE/NW ellipticity long axis. A ring of enhanced pressure with a radius of roughly 3![]() |
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Figure 7: Pressure deviations from an elliptical model (ratio). Contour levels are drawn at 0.9, 0.95, 1.05 and 1.1. Two regions roughly corresponding to the end of the E arm and to the SW arm are seen to have lower than average values, indicating the possible presence of nonthermal pressure support. |
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Figure 8: Data and best-fit vmcflow model with fixed low-temperature cutoff for the small-scale low-temperature feature NW of the core. The disagreement of the model with the data is easily visible, indicating the absence of a classical cooling flow. |
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Figure 9: Data and best-fit two-temperature vmekal model for the small-scale low-temperature feature NW of the core. This model is clearly in better agreement with the data than the classical cooling flow model. |
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Figure 10: Entropy ( left) and pressure ( right) deviations from a smooth radially symmetric model overlaid with radio contours (90 cm). Radio map kindly provided by F. Owen. The E and SW radiolobes coincide well with the regions of low entropy in the X-ray arms. Also, the edge of the large radiolobe to the north roughly coincides with a NW edge in the entropy map. |
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Figure 11: Temperature and abundance NW/SE asymmetry. The solid line represents the profile NW of the core, the dashed red line SE of the core. |
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Figure 12: Entropy and temperature radial profiles, calculated as an average of the values in the bins whose center falls inside circular annuli sectors with an opening angle of 90 degrees NW and SE of the core. The errorbars represent the corresponding standard deviation in each annulus sector. |
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Figure 13:
Projected temperature and relative pressure jumps around the 3![]() |
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