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The HI distribution observed toward a halo region of the MilkyWay

Abstract:

We use observations of the neutral atomic hydrogen (HI) 21-cm emission line to study the spatial distribution of the HI gas in a 80° × 90° region of the Galaxy halo. The HI column densities in the range of 3-11 × 1020 cm-2 have been estimated for some of the studied regions. In our map-obtained with a spectral sensitivity of ~2 K-we do not detect any HI 21-cm emission line above 2σ at Galactic latitudes higher than ~46°. This report summarizes our contribution presented at the conference on the origin and evolution of barionic Galaxy halos.