Emission from Low Ionization Gas in the Galaxy observed with SPEAR

Details Emission from Low Ionization Gas in the Galaxy observed with SPEAR Emission from Low Ionization Gas in the Galaxy observed with SPEAR

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.1703s&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #17.03; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

We present sky maps of the Si II λ1526,1533 and Al II λ1670 emission obtained with the SPEAR (FIMS) instrument. These emission lines trace low ionization gas, which exists mainly in the cool phases of the diffuse interstellar medium. Since these emission lines are photoexcited, their fluxes are sensitive to the radiation field. We examine the relationship of the low ionization gas in the interstellar medium with the dust , the molecular gas and the hot component by comparing these maps with SPEAR maps of the continuum, H2, and C IV λ1550, respectively. The map can be compared with absorption line measurements to derive the physical conditions in the emitting regions.
SPEAR (FIMS) is supported by NASA grant NAG5-5355, and flies on the the STSAT-1 Mission, supported by the Korea Ministry of Science and Technology.

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