Planetary nebulae as dynamical tracers: Mass-to-light-ratio gradients in early-type galaxies

被引:0
|
作者
Napolitano, N. R. [1 ]
Romanowsky, A. J. [2 ]
Capaccioli, M. [3 ]
Kuijken, K. [1 ,4 ]
Merrifield, M. R. [2 ]
Douglas, N. G.
Arnaboldi, M. [5 ]
Freeman, K. C. [6 ]
Gerhard, O. [7 ]
机构
[1] Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands
[2] Univ Nottingham, Sch Phys & Astron, Nottingham, England
[3] INAF, Observ Capodimote, Naples, Italy
[4] Leiden Univ, Leiden, Netherlands
[5] INAF, Observ Pino, Turin, Italy
[6] RSAA, Mt Stromlo & Siding Spring Observ, Canberra, ACT, Australia
[7] Univ Basel, Dept Astron, Basel, Switzerland
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中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Planetary Nebulae (PNe) have enabled mass-to-light ratios (M/L) in early-type galaxies to be constrained to unprecedented distance from the center, showing in some cases clear evidence of increasing M/L, in other cases fairly constant M/L. We combine the information obtained from PN kinematics with radially extended long-slit spectroscopy data in order to constrain the M/L trends in a heterogeneous sample of early-type galaxies. We discuss whether these trends are expected in the Lambda CDM framework of galaxy formation.
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页码:324 / +
页数:2
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