On the existence of the annular ring surrounding the interface between the Local and Loop I bubbles

Details On the existence of the annular ring surrounding the interface between the Local and Loop I bubbles On the existence of the annular ring surrounding the interface between the Local and Loop I bubbles

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1156..213r&link_type=abstract

THE LOCAL BUBBLE AND BEYOND II: Proceedings of the International Conference. AIP Conference Proceedings, Volume 1156, pp. 213-2

Computer Science

Databases

Interstellar Dust Grains, Diffuse Emission, Infrared Cirrus, Dark Matter, Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc., Galactic Center, Bar, Circumnuclear Matter, And Bulge, Photography And Photometry

Scientific paper

The Sun is located inside an extremely low density region (nHI<=0.005 cm-3) of quite irregular shape named the Local Bubble or Local Cavity. Close to the Local Bubble, there is an even bigger 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 70 pc. Our goal is to identify the interface and discuss the ring's existence using Strömgren uvbyHβ data. We have used the data of the ``General Catalogue of Photometric Data'' covering the region defined by the Galactic coordinates: 250°<=l<=50° and -60°<=b<=60° to obtain E(b-y) colour excess and distances. The final sample is composed by 4217 stars located up to 500 pc from the Sun. The ring-like feature does not show up in the colour excess spatial distribution.

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