A Dearth of Dark Matter in Ordinary Elliptical Galaxies | Zendy

Aaron J. Romanowsky | Zendy; Nigel G. Douglas | Zendy; M. Arnaboldi | Zendy; Konrad Kuijken | Zendy; M. R. Merrifield | Zendy; N. R. Napolitano | Zendy; Massimo Capaccioli | Zendy; K. C. Freeman | Zendy

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A Dearth of Dark Matter in Ordinary Elliptical Galaxies

Author(s) -

Aaron J. Romanowsky,

Nigel G. Douglas,

M. Arnaboldi,

Konrad Kuijken,

M. R. Merrifield,

N. R. Napolitano,

Massimo Capaccioli,

K. C. Freeman

Publication year - 2003

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.1087441

Subject(s) - physics , astrophysics , elliptical galaxy , lenticular galaxy , astronomy , velocity dispersion , galaxy group , galaxy rotation curve , dark matter halo , interacting galaxy , dark galaxy , dark matter , galaxy , peculiar galaxy , galaxy formation and evolution , halo

The kinematics of the outer parts of three intermediate-luminosity elliptical galaxies were studied with the Planetary Nebula Spectrograph. The galaxies' velocity-dispersion profiles were found to decline with the radius, and dynamical modeling of the data indicates the presence of little if any dark matter in these galaxies' halos. This unexpected result conflicts with findings in other galaxy types and poses a challenge to current galaxy formation theories.

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