Early Results from the Wisconsin H-Alpha Mapper Southern Sky Survey - Astrophysics > Astrophysics of GalaxiesReportar como inadecuado




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Abstract: After a successful eleven-year campaign at Kitt Peak, we moved the WisconsinH-Alpha Mapper WHAM to Cerro Tololo in early 2009. Here we present some ofthe early data after a few months under southern skies. These maps begin tocomplete the first all-sky, kinematic survey of the diffuse H-alpha emissionfrom the Milky Way. Much of this emission arises from the Warm Ionized MediumWIM, a significant component of the ISM that extends a few kiloparsecs abovethe Galactic disk. While this first look at the data focuses on the H-alphasurvey, WHAM is also capable of observing many other optical emission lines,revealing fascinating trends in the temperature and ionization state of theWIM. Our ongoing studies of the physical conditions of diffuse ionized gas willcontinue from the southern hemisphere following the H-alpha survey. Inaddition, future observations will cover the full velocity range of theMagellanic Stream, Bridge, and Clouds to trace the ionized gas associated withthese neighboring systems.



Autor: L. M. Haffner, R. J. Reynolds, G. J. Madsen, A. S. Hill, K. A. Barger, K. P. Jaehnig, E. J. Mierkiewicz, J. W. Percival, N. Chopr

Fuente: https://arxiv.org/







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