Detecting the Hot Wind Escaping from the Galactic Center of the Milky Way

Details Detecting the Hot Wind Escaping from the Galactic Center of the Milky Way Detecting the Hot Wind Escaping from the Galactic Center of the Milky Way

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010cxo..prop.3034s&link_type=abstract

Chandra proposal ID #12910240

Physics

Scientific paper

We propose a 300 ksec ACIS + LETG exposure to detect and study our own Galaxy's outflowing nuclear wind. We have used HST and FUSE to discover the absorption signature of this wind in intermediate (e.g. C III) and high (e.g. O VI) ions towards two extragalactic targets above and below the Galactic Center. One of these targets (PKS 2005-489) is bright enough to observe at low resolution with Chandra to address two important questions about this wind: (1) Does any portion of this wind (e.g., O VII & O VIII ions) escape the Galaxy? The C III & O VI ions do not have escape speed; and (2) What is the ionization state and thus the metallicity of the gas? The mass flux, dynamics, and metallicity of this wind will give us valuable insight into the star formation history of the Milky Way.

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