The HI Distribution Observed toward a Halo Region of the Milky Way

abstract

The HI Distribution Observed toward a Halo Region of the Milky Way

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°x90° 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.

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