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The
evolution of hot interstellar medium (ISM) in galaxies is
fundamental to the evolution of our cosmos. The
Spectroscopy of Plasma Evolution from Astrophysical
Radiation (SPEAR) mission will study the hot ISM,
providing pointed observations and the first all-sky
spectral maps in the Far (FUV) Ultraviolet. The FUV
bandpass contains the primary cooling lines of abundant
elements in a variety of ionization states. SPEAR’s broad
bandpass (λλ 900 – 1750 Å), spectral resolution
(λ/δλ ~ 700) and imaging resolution (5’ – 10’) has been
chosen to determine independently the quantity,
temperature, depletion, and ionization of hot galactic
gas. These SPEAR data allow us to study the hot ISM
on both large and small scales and to discriminate among
models of the large-scale creation, distribution, and
evolution of hot gas in the Galactic disk and halo.
This website is divided into two parts. The first is a public archive which allows access to the SPEAR all-sky survey raw spectra as well as the intensity maps for ten emission line features. The second part is a list of published science results. This web site was created by Jonah Nakagawa and Martin Sirk. |
| Spear Archive |