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Dark Matter in Dwarf Galaxies: High Resolution Observations

Published online by Cambridge University Press:  26 May 2016

Alberto D. Bolatto ,
Joshua D. Simon ,
Adam Leroy  and
Leo Blitz
Alberto D. Bolatto
Affiliation:
Radio Astronomy Laboratory and Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720, USA
Joshua D. Simon
Affiliation:
Radio Astronomy Laboratory and Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720, USA
Adam Leroy
Affiliation:
Radio Astronomy Laboratory and Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720, USA
Leo Blitz
Affiliation:
Radio Astronomy Laboratory and Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720, USA

Abstract

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We present observations and analysis of rotation curves and dark matter halo density profiles in the central regions of four nearby dwarf galaxies. This observing program has been designed to overcome some of the limitations of other rotation curve studies that rely mostly on longslit spectra. We find that these objects exhibit the full range of central density profiles between ρ ∝ r0 (constant density) and ρ ∝ r–1 (NFW halo). This result suggests that there is a distribution of central density slopes rather than a unique halo density profile.

Type
Part 11: Dwarf Galaxies
Information
Symposium - International Astronomical Union , Volume 220: Dark Matter in Galaxies , 2004 , pp. 353 - 358
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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