Stellar Velocity Profiles and Line-Strengths out to Four Effective Radii in the Early-Type Galaxy NGC 3379

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dc.creatorWeijmans, A.
dc.creatorCappellari, M.
dc.creatorde Zeeuw, P. T.
dc.creatorEmsellem, E.
dc.creatorFalcon-Barroso, J.
dc.creatorKuntschner, H.
dc.creatorMcDermid, R. M.
dc.creatorBosch, R. C. E. van den
dc.creatorvan de Ven, G.
dc.date2008-11-18
dc.date.accessioned2026-07-07T10:19:07Z
dc.date.available2026-07-07T10:19:07Z
dc.descriptionWe describe a new technique to measure stellar kinematics and line-strengths at large radii in nearby galaxies. Using the integral-field spectrograph SAURON as a 'photon-collector', we obtain spectra out to four effective radii (Re) in the early-type galaxy NGC 3379. By fitting orbit-based models to the extracted stellar velocity profile, we find that ~40% of the total mass within 5 Re is dark. The measured absorption line-strengths reveal a radial gradient with constant slope out to 4 Re.
dc.description4 pages, 3 figures, to appear in the proceedings of "Galaxy Evolution: Emerging Insights and Future Challenges", 11-14 November 2008, Austin, USA
dc.identifierhttps://arxiv.org/abs/0811.2840
dc.identifierhttp://arxiv.org/abs/0811.2840
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/174397
dc.subjectAstrophysics
dc.titleStellar Velocity Profiles and Line-Strengths out to Four Effective Radii in the Early-Type Galaxy NGC 3379
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