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ΛCDM and the distribution of dark matter in galaxies: A constant–density halo around DDO 47

Salucci, P. and Walter, F. and Borriello, A. (2003) ΛCDM and the distribution of dark matter in galaxies: A constant–density halo around DDO 47. Astronomy & Astrophysics, 409 (1). pp. 53-56. ISSN 0004-6361. http://resolver.caltech.edu/CaltechAUTHORS:20180228-104237796

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Abstract

In this paper we present a test case for the existence of a core in the density distribution of dark halos around galaxies. DDO 47 has a rotation curve that increases linearly from the first data point, at 300 pc, up to the last one, at 5 kpc. This profile implies the presence of a (dark) halo with an (approximately) constant density over the region mapped by data. This evidences the inability of standard Λ Cold Dark Matter scenario to account for the dark matter distribution around galaxies, and points toward the existence of an intriguing halo scale–length of homogeneity. This work adds up to the results of Blais-Ouellette et al. (2002), Trott & Webster (2002), Binney & Evans (2002), de Blok & Bosma (2002) and Bottema (2002) in suggesting that at galactic scales CDM theory should incorporate, as an intrinsic property, a “density core" feature.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1051/0004-6361:20030646DOIArticle
https://www.aanda.org/articles/aa/abs/2003/37/aa3059/aa3059.htmlPublisherArticle
https://arxiv.org/abs/astro-ph/0206304arXivDiscussion Paper
ORCID:
AuthorORCID
Walter, F.0000-0003-4793-7880
Additional Information:© 2003 ESO. Received: 3 September 2002. Accepted: 10 April 2003. We want to thank the referee R. Bottema for suggestions that have improved the presentation of this paper. P.S. wants to thank G. Danese and U. Klein for useful discussions.
Subject Keywords:cosmology: dark mater - galaxies: spiral - galaxies: formation
Record Number:CaltechAUTHORS:20180228-104237796
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180228-104237796
Official Citation:ΛCDM and the distribution of dark matter in galaxies: A constant–density halo around DDO 47 P. Salucci, F. Walter and A. Borriello A&A, 409 1 (2003) 53-56 DOI: https://doi.org/10.1051/0004-6361:20030646
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85006
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:28 Feb 2018 20:06
Last Modified:28 Feb 2018 20:06

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