Highly Ionized Nitrogen in the Galactic Halo

Details Highly Ionized Nitrogen in the Galactic Halo Highly Ionized Nitrogen in the Galactic Halo

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.3463s&link_type=abstract

HST Proposal ID #3463

Computer Science

Hst Proposal Id #3463

Scientific paper

We will obtain GHRS intermediate resolution observations with the G160M grating (FWHM = 15 km/s) of the N V 1240 A doublet in absorption toward 1 distant halo star and two bright AGN's. These measurements will provide high quality data for the most important high temperature gas diagnostic accessible with the HST. The data will be used to study the line broadening and component structure of the N V absorption and to probe the general prevalence of this important ion in Galactic halo gas. We will study the velocity correspondence between the N V and cooler gas traced by Mg II, S II, and Si II. We will obtain information about high temperature Galactic halo gas along 3 sight lines, including two extragalactic ones. With this information we aim to better understand the origin of Galactic halo gas, the ionization of the gas, and those processes occurring in the Galactic disk which result in the venting of energy into the Galactic halo.

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