AAS 199th meeting, Washington, DC, January 2002
Session 11. Interstellar Medium - I
Display, Monday, January 7, 2002, 9:20am-6:30pm, Exhibit Hall

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[11.03] The Scorpius-Centaurus OB Association and the Origin of the Local Bubble

J. Maíz-Apellániz (Space Telescope Science Institute)

The Sun is located inside the Local Bubble, a region of the ISM which is the likely result of several nearby SN explosions within the last 10 Myr. We show here that part of the Scorpius-Centaurus OB association (Sco-Cen OB) was located closer to the present position of the Sun 5-7 Myr ago than today. Evolutionary synthesis models indicate that the association must have experienced ~20 SNe in the last 10-12 Myr, a prediction that is supported by the detection of four or five runaway stars escaping from it. The ~6 SNe produced by the Lower Centaurus Crux subgroup of Sco-Cen OB are likely responsible for the creation of the Local Bubble.

Support for this work was provided by grant 82280 from the STScI DDRF.

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