Implications Of Hα Observations For Studies Of The CMB
Document Type
Book Chapter
Publication Date
1999
Published In
Microwave Foregrounds
Series Title
Astronomical Society Of The Pacific Conference Series
Abstract
We summarize the relationship between the free-free emission foreground and Galactic H-alpha emission. H-alpha observations covering nearly the entire celestial sphere are described. These data provide a template to isolate and/or remove the effect of Galactic free-free emission from observations of the cosmic microwave background. Spectroscopy and imaging provide to complementary methods for measuring the H-alpha emission. Spectroscopy is favored for its velocity resolution and imaging is favored for tis angular resolution. With templates of the three dominant foregrounds, namely synchrotron, thermal dust, and free-free emissions, it may be possible to quantify the location and the brightness of another foreground such as that from rotating dust grains.
Published By
Astronomical Society Of The Pacific
Editor(s)
A. de Oliveira-Costa And M. Tegmark
Conference
Sloan Summit On Origins
Conference Dates
November 14-15, 1998
Conference Location
Princeton, New Jersey
Recommended Citation
P. R. McCullough et al.
(1999).
"Implications Of Hα Observations For Studies Of The CMB".
Microwave Foregrounds.
Volume 181,
253-272.
https://works.swarthmore.edu/fac-physics/283