Central Mass Concentration and Bar Dissolution in Nearby Spiral Galaxies | Zendy

Mousumi Das | Zendy; Peter Teuben | Zendy; S. N. Vogel | Zendy; Michael W. Regan | Zendy; Kartik Sheth | Zendy; A. I. Harris | Zendy; W. H. Jefferys | Zendy

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Central Mass Concentration and Bar Dissolution in Nearby Spiral Galaxies

Author(s) -

Mousumi Das,

Peter Teuben,

S. N. Vogel,

Michael W. Regan,

Kartik Sheth,

A. I. Harris,

W. H. Jefferys

Publication year - 2003

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 - 10.1086/344480

Subject(s) - bar (unit) , radius , bulge , spiral galaxy , galaxy , physics , astrophysics , spiral (railway) , mass concentration (chemistry) , galaxy rotation curve , rotation (mathematics) , dissolution , chemistry , geometry , galaxy formation and evolution , meteorology , thermodynamics , mathematical analysis , computer security , mathematics , computer science

We use data from the BIMA Survey of Nearby Galaxies (SONG) to investigate therelationship between ellipticity and central mass concentration in barredspirals. Existing simulations predict that bar ellipticity decreases asinflowing mass driven by the bar accumulates in the central regions, ultimatelydestroying the bar. Using the ratio of the bulge mass to the mass within thebar radius as an estimate of the central mass concentration, we obtaindynamical mass estimates from SONG CO 1-0 rotation curve data. We find aninverse correlation between bar ellipticity and central mass concentration,consistent with simulations of bar dissolution.Comment: 10 pages, 2 figures and 2 tables, accepted for publication in the Astrophysical Journa

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