Galaxy dynamics with the Planetary Nebula Spectrograph

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dc.creatorNapolitano, N. R.
dc.creatorRomanowsky, A. J.
dc.creatorDouglas, N. G.
dc.creatorCapaccioli, M.
dc.creatorArnaboldi, M.
dc.creatorKuijken, K.
dc.creatorMerrifield, M. R.
dc.creatorFreeman, K. C.
dc.creatorGerhard, O.
dc.date2004-06-18
dc.date.accessioned2026-07-07T02:13:35Z
dc.date.available2026-07-07T02:13:35Z
dc.descriptionThe Planetary Nebula Spectrograph is a dedicated instrument for measuring radial velocity of individual Planetary Nebulae (PNe) in galaxies. This new instrument is providing crucial data with which to probe the structure of dark halos in the outskirts of elliptical galaxies in particular, which are traditionally lacking of easy interpretable kinematical tracers at large distance from the center. Preliminary results on a sample of intermediate luminosity galaxies have shown little dark matter within 5 ~ R_eff implying halos either not as massive or not as centrally concentrated as CDM predicts (Romanowsky et al. 2003). We briefly discuss whether this is consistent with a systematic trend of the dark matter content with the luminosity as observed in an extended sample of early-type galaxies.
dc.description6 pages, 4 figures. To appear on proceedings of the 48th Congress of the Italian Astronomical Society (SAIt)
dc.identifierhttps://arxiv.org/abs/astro-ph/0406419
dc.identifierhttp://arxiv.org/abs/astro-ph/0406419
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7860
dc.subjectAstrophysics
dc.titleGalaxy dynamics with the Planetary Nebula Spectrograph
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