Hostname: page-component-745bb68f8f-kw2vx Total loading time: 0 Render date: 2025-01-14T05:54:02.287Z Has data issue: false hasContentIssue false
  • English
  • Français

The Draco dwarf in CDM and MOND

Published online by Cambridge University Press:  19 May 2006

G.A. Mamon ,
F. Combes ,
C. Deffayet ,
B. Fort ,
E. Łokas ,
G. Mamon  and
F. Prada
E. Łokas
Affiliation:
Nicolaus Copernicus Astronomical Center, Warsaw, Poland
G. Mamon
Affiliation:
Institut d'Astrophysique de Paris, France
F. Prada
Affiliation:
Instituto de Astrofísica de Andalucia, Granada, Spain
Get access

Abstract

We present interpretations of the line-of-sight velocity distribution of stars in theDraco dwarf spheroidal galaxy in terms of CDM and MOND assuming constant mass-to-light ratioand anisotropy. We estimate the two parameters by fittingthe line-of-sight velocity dispersion and kurtosis profiles for stellar samplesdiffering by a number of stars rejected as interlopers.The results of the fitting procedure for CDM, high mass-to-light ratio(131–141 solar units in the V-band) and weakly tangential orbits, are similar fordifferent samples, but the quality of the fit is much worse when fewer interlopersare removed. For MOND, the derived mass-to-light ratio (21 solar units) is too large to beexplained by the stellar content of the galaxy.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 20: Mass Profiles and Shapes of Cosmological Structures , 2006 , pp. 113 - 118
Copyright
© EAS, EDP Sciences, 2006

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)