The Wisconsin Hα Mapper Northern Sky Survey

Details The Wisconsin Hα Mapper Northern Sky Survey The Wisconsin Hα Mapper Northern Sky Survey

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.5801h&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #58.01; Bulletin of the American Astronomical Society, Vol. 33, p.1389

Other

3

Scientific paper

The ionized gas in the Milky Way has been fully surveyed from the Northern Hemisphere by the Wisconsin Hα Mapper (WHAM). The WHAM Northern Sky Survey (WHAM-NSS) has an angular resolution of one-degree and provides the first kinematically resolved map of the Warm Ionized Medium (WIM). With 12 km s-1 spectral resolution, we have removed atmospheric emission and zodiacal absorption features from each of the 37,565 spectra, leaving behind a fully resolved Galactic Hα profile. Galactic emission is detected in nearly every spectrum. Velocity channel maps from the survey show complex filamentary structure in the local WIM and in the nearest spiral arms. Some of these halo features are clearly associated with active star formation in the Galactic plane. High-latitude Hα emission at intermediate velocities traces out IVC complexes previously discovered through 21 cm observations. An initial analysis of the relationship between the high latitude Hα and 21 cm emission suggests that although the spatial extent and velocity profiles are quite similar, the intensities are completely uncorrelated. Our deep emission sensitivity also reveals several H 2 regions around early B stars and sdO stars, providing an indirect probe of their Lyman continuum and adding another ionizing source for the WIM. Total intensity maps, velocity channel maps, and full spectral profiles from the WHAM-NSS are available for download at http://www.astro.wisc.edu/wham/. WHAM was built and continues to explore the rich science of ionized gas through generous support of the National Science Foundation. This work is funded by grant AST96-19424.

Affiliated with

Also associated with

No associations

Rating

The Wisconsin Hα Mapper Northern Sky Survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Wisconsin Hα Mapper Northern Sky Survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Wisconsin Hα Mapper Northern Sky Survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1231705