Does the Milky Way produce a starburst wind?

Details Does the Milky Way produce a starburst wind? Does the Milky Way produce a starburst wind?

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pgqa.conf..424k&link_type=abstract

Probing Galaxies through Quasar Absorption Lines, IAU Colloquium Proceedings of the International Astronomical Union 199, held M

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present new FUSE and HST/stis observations of two high galactic latitude AGN that we use to measure the nuclear wind velocity of the milky way for the first time. We find high velocity C IIi & O VI at a heliocentric velocity of +163 ± 8 {km s-1} and C IIi & N V at -105 ± 14 {km s-1} toward pks 2005-489 (l=350°, b=-33°) and C III, C IV, & Si IV and C III & O VI toward mrk 1383 (l=349°, b=55°) at +48 ± 4 {km s-1} and +94 ± 7 {km s-1}, respectively. We have estimated the galactocentric escape velocity of gas above the galactic centre along the pks 2005-489 and mrk 1383 sight-lines to be ≥ 215 ± 35 and ≥ 145 ± 25 {km s-1}, respectively. Thus, we have detected both infalling and bound outflowing gas from the galactic centre, indicating that the milky way does not produce a starburst wind, but a bound galactic "fountain" instead.

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