The Origin of the Hercules Stream

Details The Origin of the Hercules Stream The Origin of the Hercules Stream

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.8503o&link_type=abstract

American Astronomical Society Meeting 210, #85.03; Bulletin of the American Astronomical Society, Vol. 39, p.194

Astronomy and Astrophysics

Astronomy

Scientific paper

We find that the Hercules Stream appears to have a dynamical origin within our own Galaxy. Our measurements of [Mg/Fe] and [Ba/Fe] in 60 Hercules Stream stars show a range of one-tenth solar to super-solar metallicity; across this range, the data are consistent with the abundance patterns of these elements in the Galactic thick and thin disks. Thus, our results favor a dynamical origin, perhaps induced by the Galactic bar, rather than an extragalactic merger origin, for the Hercules Stream.

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