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HD 25211


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Central K-band kinematics and line strength maps of NGC 1399
In this paper we present for the first time high spatial resolutionK-band maps of the central kinematical and near-infrared spectralproperties of the giant cD galaxy in the Fornax cluster, NGC 1399. Weconfirm the presence of a central velocity dispersion dip within r ≤0.2 arcsec seen in previous long-slit studies. Our velocity dispersionmaps give evidence of a non-symmetric structure in this central area byshowing three σ peaks to the north-east, south-east and west ofthe galaxy centre. Additionally we measure near-IR line strength indicesat unprecedented spatial resolution in NGC 1399. The most importantfeatures we observe in our 2-dimensional line strength maps are drops inNa I and CO (2-0) line strength in the nuclear region of the galaxy,coinciding spatially with the drop in σ. The observed linestrength and velocity dispersion changes suggest a scenario where thecentre of NGC 1399 harbours a dynamically cold subsystem with a distinctstellar population.Based on observation collected at the ESO Paranal La Silla Observatory,Chile, during the Science Verification of SINFONI.

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观测天体数据

星座:網罟座
右阿森松:03h56m35.35s
赤纬:-61°42'29.2"
视星:9.308
右阿森松适当运动:9
赤纬适当运动:14
B-T magnitude:11.289
V-T magnitude:9.472

目录:
适当名称   (Edit)
HD 1989HD 25211
TYCHO-2 2000TYC 8868-1871-1
USNO-A2.0USNO-A2 0225-00989065
HIPHIP 18446

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