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Sep27-04, 05:58 PM
Sci Advisor
P: 1,047
I think one must note that the local bubble (in which the solar system is located since aprox. 4 million years) is a cold environment if one compares with the interstellar medium. The temperature of this cloud the solar system is entering seams reasonable to me if one considers the assumption of the creation of the the local bubble due to a few supernovae from the Sco-Cen OB-association (emission nebulae surrounding O or B stars have usually 8000 - 10.000 K). This supernovae generate a cavity within the interstellar medium (our bubble is called the local bubble or local chimney) in which the density as well as the temperature decrease. The walls of the cavity are hotter and there are also couldlets near the walls, which should be also hotter.