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arxiv: astro-ph/0603143 · v1 · pith:HA7YGIOHnew · submitted 2006-03-06 · 🌌 astro-ph

Extended HI Rotation Curve and Mass Distribution of M31

Claude Carignan , Laurent Chemin , Walter K. Huchtmeier , Felix J. Lockman This is my paper
classification 🌌 astro-ph
keywords masscurverotationdistributionmsolvelocitybankcompared
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New HI observations of Messier 31 (M31) obtained with the Effelsberg and Green Bank 100-m telescopes make it possible to measure the rotation curve of that galaxy out to ~35 kpc. Between 20 and 35 kpc, the rotation curve is nearly flat at a velocity of ~226 km/s. A model of the mass distribution shows that at the last observed velocity point, the minimum dark-to-luminous mass ratio is \~0.5 for a total mass of 3.4 10^11 Msol at R < 35 kpc. This can be compared to the estimated MW mass of 4.9 10^11 Msol for R < 50 kpc.

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Cited by 2 Pith papers

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