Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541320n&link_type=abstract
American Astronomical Society, AAS Meeting #215, #413.20; Bulletin of the American Astronomical Society, Vol. 42, p.253
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the most sensitive HI maps of the Magellanic Stream (MS) to date in two regions taken with the Green Bank Telescope. We analyze these data in order to place constraints on the hydrodynamical processes at the interface between the MS and the Galactic halo. These processes operate on relatively small scales and not only help shape this clumpy stream, but also affect the neutral gas dynamics and transfer of mass from the stream to the halo, thus affecting metal enrichment and gas replenishment of the Galaxy. The methods we apply include structural analysis, searching for cold gas cores in clumps and analyzing gas kinematics as it transitions to the halo. The latter incorporates sophisticated spatial integration techniques to enhance sensitivity even further, thus allowing us to probe deeply for MS gas components with densities approaching that of the Galactic halo.
Gallagher John S. III
Lockman Felix J.
Majewski Steven R.
Nidever David L.
Nigra Lou
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