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Wagner Corradi |
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"On the Existence of the
Interaction Wall between the Local and Loop I Bubbles" |
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The Sun is located inside an extremely low density region of irregular shape called the Local Bubble. Close to it, there is an even larger cavity known as Loop I. A ring-like feature, observed in X-ray and HI, has been proposed as the contour of the bubbles interaction zone around 70pc from the Sun. To confirm the ring's existence we used Stroemgren photometry for 4346 stars and polarimetry for 900 stars covering the interaction zone (defined by 50\deg < l < 250\deg and -60\deg < b < 60\deg). The analysis has shown that the west side of the ring is located about 90pc from the Sun, while the east side is farther than 280pc. The same discrepancy is seen on the polarization vectors' orientation pattern along the ring. In this talk we question the existence of such ring-like feature as an unique large scale feature between the two bubbles. |