The Stellar Dynamics and Mass of NGC 1316 Using the Radial Velocities of Planetary Nebulae | Zendy

M. Arnaboldi | Zendy; K. C. Freeman | Zendy; Ortwin Gerhard | Zendy; M. Matthias | Zendy; R. P. Kudritzki | Zendy; R. H. Méndez | Zendy; M. Capaccioli | Zendy; H. C. Ford | Zendy

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The Stellar Dynamics and Mass of NGC 1316 Using the Radial Velocities of Planetary Nebulae

Author(s) -

M. Arnaboldi,

K. C. Freeman,

Ortwin Gerhard,

M. Matthias,

R. P. Kudritzki,

R. H. Méndez,

M. Capaccioli,

H. C. Ford

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/306359

Subject(s) - physics , radius , astrophysics , planetary nebula , radial velocity , galaxy , stellar mass , galaxy rotation curve , rotation (mathematics) , line (geometry) , kinematics , astronomy , stars , galaxy formation and evolution , star formation , geometry , classical mechanics , computer security , mathematics , computer science

We present a study of the kinematics of the outer regions of the early-typegalaxy NGC 1316, based on radial velocity measurements of 43 planetary nebulaeas well as deep integrated-light absorption line spectra. The smoothed velocityfield of NGC 1316 indicates fast rotation at a distance of 16 kpc, possiblyassociated with an elongated feature orthogonal to the inner dust lanes. Themean square stellar velocity is approximately independent of radius, and theestimated total mass of the system is 2.6 x 10^11 M_sun within a radius of 16kpc, implying an integrated mass-to-light ratio of M/L_B = 8.Comment: 39 pages, 14 figures, in press on The Astrophysical Journal n. 50

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