The SPEAR (Spectroscopy of Emission from Astrophysical Radiation) Mission

Details The SPEAR (Spectroscopy of Emission from Astrophysical Radiation) Mission The SPEAR (Spectroscopy of Emission from Astrophysical Radiation) Mission

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004assl..315..373e&link_type=abstract

How Does the Galaxy Work? A Galactic Tertulia with Don Cox and Ron Reynolds. Edited by Emilio J. Alfaro, Instituto de Astrofica

Astronomy and Astrophysics

Astrophysics

Scientific paper

Observations with the Spectroscopy of Plasma Evolution from Astrophysical Radiation (SPEAR) mission will determine the quantity, temperature, depletion, and ionization of hot(104 - 106 K) interstellar medium in the Galaxy. SPEAR, launched 27 September, 2003 and scheduled to begin operations in November, 2003, will produce the first spectral (λλ 900 - 1750 Å, λ/δλ 500) all-sky maps (5 - 10 arc minute resolution) of diffuse emission from the primary cooling lines of many abundant elements in a variety of ionization states. SPEAR will also observe the cold interstellar medium by measuring molecular hydrogen florescence and the scattering of starlight by interstellar dust. These SPEAR data will allow study of the ISM on both large and small scales and discriminate among models of the large-scale creation, distribution, and evolution of hot gas in the Galactic disk and halo.

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