Effelsberg HI Survey of Compact High-Velocity Clouds

Details Effelsberg HI Survey of Compact High-Velocity Clouds Effelsberg HI Survey of Compact High-Velocity Clouds

2003-10-09

arxiv.org/abs/astro-ph/0310247v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, to appear in the proceedings of the conference "Satellites and Tidal Streams", La Palma, Spain, 26-30 May

Scientific paper

We studied 11 compact high-velocity clouds (CHVCs) in the 21-cm line emission of neutral hydrogen with the 100-m telescope in Effelsberg. We find that most of our CHVCs are not spherically-symmetric as we would expect in case of a non-interacting, intergalactic population. Instead, many CHVCs reveal a complex morphology suggesting that they are disturbed by ram-pressure interaction with an ambient medium. Thus, CHVCs are presumably located in the neighborhood of the Milky Way instead of being spread across the entire Local Group.

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