Absorption Measurements of Cold Halo Gas: FIRST's Sensitivity

Details Absorption Measurements of Cold Halo Gas: FIRST's Sensitivity Absorption Measurements of Cold Halo Gas: FIRST's Sensitivity

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.460..309s&link_type=abstract

The Promise of the Herschel Space Observatory. Eds. G.L. Pilbratt, J. Cernicharo, A.M. Heras, T. Prusti, & R. Harris. ESA-SP 460

Other

Galaxies: Halo, Interstellar Matter: Missing Mass, Mission: First

Scientific paper

We discuss the sensitivity of FIRST to detect cold gas in the outer Galaxy by line absorption against the thermal dust emission from nearby, bright galaxies. The analysis shows that some ten of these are sufficiently strong and extended for a successful absorption measurement. The spectral range of FIRST covers several important ground state transitions of abundant atomic and molecular species. These allow to probe a range of chemical (and physical) conditions of the potentially present cold halo gas, which are not accessible by or complementary to observations by other means.

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