We present preliminary results of the spectroscopic observations of a sample of 12 bulge-dominated low surface brightness galaxies (LSB). We measured the stellar and gaseous kinematics along their major and minor axes. Such combined information will allow us to accurately investigate the dark matter (DM) content within their optical regions, providing further constraints on cosmological models. In particular we are going to test the consistency of the observed DM density radial profiles with the predictions of standard CDM models. Preliminary constant M/L modeling indicates the presence of dark matter at all radii. In order to derive the DM density radial profiles we need to construct dynamical mass models with a dark matter halo (work in progress).
CDM or pseudo-isothermal halos in LSB galaxies
PIZZELLA, ALESSANDRO;CORSINI, ENRICO MARIA;BERTOLA, FRANCESCO;
2003
Abstract
We present preliminary results of the spectroscopic observations of a sample of 12 bulge-dominated low surface brightness galaxies (LSB). We measured the stellar and gaseous kinematics along their major and minor axes. Such combined information will allow us to accurately investigate the dark matter (DM) content within their optical regions, providing further constraints on cosmological models. In particular we are going to test the consistency of the observed DM density radial profiles with the predictions of standard CDM models. Preliminary constant M/L modeling indicates the presence of dark matter at all radii. In order to derive the DM density radial profiles we need to construct dynamical mass models with a dark matter halo (work in progress).Pubblicazioni consigliate
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