Nearby Dwarf Galaxies @ СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs1/25 The dark matter distribution.

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Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs1/25 The dark matter distribution in dwarf galaxies: a contribution to the cusp-core discussion Ralf-Jürgen Dettmar Ruhr-University Bochum

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs2/25 Collaborators: Janine van Eymeren (AIRUB, UManchester) Clemens Trachternach (AIRUB) Dominik Bomans (AIRUB) Baerbel Koribalski (ATNF/CSIRO, AUS)

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs3/25 disk-halo connection with outflows or winds?

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs4/25 gaseous galactic halos of diffuse ionized gas (DIG) are easily observable in H NGC4700 (Rossa&Dettmar 2001)

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs5/25 NGC4700 HST/ACS (Rossa, Dahlem, Dettmar, van der Marel) HST/ACS Rossa et al. (in prep)

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs6/25 NGC2366 (DAH/Lowell) NGC4861 SDSS

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs7/25 Calar Alto 2.2m

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs8/25 Compare H_alpha velocity field with HI H_alpha data obtained with Marseille Fabry-Perot at OHP VLA Data were archival (new array combination, N2366) or taken as part of THINGS (N4861, Walter et al. 2008)

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs9/25

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs10/25

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs11/25

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs12/25

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs13/25 NFW Profile isothermal

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs14/25 Harmonic analysis of HI velocity fields typically N=3 is sufficient

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs15/25 NGC3198 from THINGS

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs16/25 Analysis of the THINGS sample (Trachternach et al. 2008)

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs17/25 Some general properties of the sample

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs18/25 Observational parameters

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs19/25

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs20/25 example: NGC4861

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs21/25 de Blok 2003

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs22/25 mass modeling

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs23/25 cusp core

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs24/25 Slope of the dark matter profile Data from de Blok (2001) De Blok & Bosma (2002) Swaters et al. (2003) our data black squares

Nearby Dwarf СПЕЦ. АСТРОФИЗИЧЕСКАЯ О Б СЕРВАТОРИЯ РАН September 15, 2009R.-J. Dettmar: Dark matter in dwarfs25/25 Conclusions The ionized gas does not reach escape velocity in the giant HII regions of N2366 and N4861 In our sample of dwarfs non-circular motions contribute an amplitude < 6km/s or even