The dwarf Galaxy DDO 47: Testing Cusps Hiding in Triaxial Halos
نویسندگان
چکیده
منابع مشابه
The Dwarf Galaxy Ddo 47 as a Dark Matter Laboratory: Testing Cusps Hiding in Triaxial Halos
We present an analysis of high resolution HI data of the dwarf galaxy DDO 47, aimed at testing the hypothesis that dark halo triaxiality might induce non-circular motions resulting in rotation curves best fitted by cored halos, even if the dark matter halo is intrinsically cuspy. This hypothesis could be invoked in order to reconcile the predictions of the standard ΛCDM theory with the rotation...
متن کاملThe Dwarf Galaxy Ddo 47 as a Dark Matter Laboratory: Testing Cusps Hiding in Triaxial Halos and the Mond Paradigm
We present an analysis of high resolution HI data of the dwarf galaxy DDO 47, aimed at testing the hypothesis that dark halo triaxiality might induce non-circular motions resulting in rotation curves best fitted by cored halos, even if the dark matter halo is intrinsically cuspy. This hypothesis has been invoked in order to reconcile the predictions of the ΛCDM theory with the rotation curves o...
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We present sensitive and high resolution 21 cm observations of the dwarf irregular (dIm) galaxy DDO 43, in conjunction with optical broad and narrow band images in U, B, V, and Hα. The observations are used to examine the relationship between its H i morphology and kinematics to past and present star formation. Optically, it is a small (R25 = 990 pc), faint (MB of −14.0) Im with a slightly boxy...
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We have constructed fully self-consistent models of triaxial galaxies with central density cusps. The triaxial generalizations of Dehnen's (1993) spherical mass models are presented, which have densities that vary as r −γ near the center and r −4 at large radii. We computed libraries of ∼ 7000 orbits in each of two triaxial models with γ = 1 (" weak cusp ") and γ = 2 (" strong cusp "); these tw...
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ژورنال
عنوان ژورنال: EAS Publications Series
سال: 2006
ISSN: 1633-4760,1638-1963
DOI: 10.1051/eas:2006089