The Wisconsin H-Alpha Mapper Northern Sky Survey

Details The Wisconsin H-Alpha Mapper Northern Sky Survey The Wisconsin H-Alpha Mapper Northern Sky Survey

2000-10-04

arxiv.org/abs/astro-ph/0010097v1

2001, ASP Conf. Ser., 231, 345

Astronomy and Astrophysics

Astrophysics

8 pages, 3 figures; preseneted at the Fourth Tetons Conference: Galactic Structure, Stars, and the Interstellar Medium, to be

Scientific paper

The Wisconsin H-Alpha Mapper (WHAM) has completed a survey in Balmer Alpha of the entire Northern sky above declination -30 deg. This survey provides the first calibrated, velocity-resolved map of the H-Alpha emission from the Galaxy. With one-degree spatial resolution, 12 km s^{-1} velocity resolution, and sensitivity to features as faint as 0.1 R (EM ~ 0.2 cm^{-6} pc), this survey provides the deepest maps of the ionized content of the Galaxy to date. In addition to probing the detailed kinematic structure of the Warm Ionized Medium and the vertical structure of the ionized content in spiral arms, initial results include the discovery of several faint, extended (d > 1\deg) H II regions and the first map of the ionized component of an intermediate velocity cloud.

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