A Search for "Dwarf" Seyfert Nuclei. VII. A Catalog of Central Stellar Velocity Dispersions of Nearby Galaxies
Abstract
We present new central stellar velocity dispersion measurements for 428 galaxies in the Palomar spectroscopic survey of bright, northern galaxies. Of these, 142 have no previously published measurements, most being relatively late-type systems with low velocity dispersions (≾100 km s^(–1)). We provide updates to a number of literature dispersions with large uncertainties. Our measurements are based on a direct pixel-fitting technique that can accommodate composite stellar populations by calculating an optimal linear combination of input stellar templates. The original Palomar survey data were taken under conditions that are not ideally suited for deriving stellar velocity dispersions for galaxies with a wide range of Hubble types. We describe an effective strategy to circumvent this complication and demonstrate that we can still obtain reliable velocity dispersions for this sample of well-studied nearby galaxies.
Additional Information
© 2009 The American Astronomical Society. Received 2008 September 11; accepted 2009 May 7; published 2009 June 16. We are very grateful to the staff of Palomar Observatory for their assistance with the observations over many years. We thank Aaron Barth and Dan Kelson for advice on methods of measuring velocity dispersions. An anonymous referee offered many helpful and critical comments that improved the paper. We acknowledge the usage of the HyperLeda database (http://leda.univ-lyon1.fr). The research of L.C.H. was supported by the Carnegie Institution of Washington. Support for J.E.G.was provided by NASA through Hubble Fellowship grant HF-01196, awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS 5-26555. A.V.F. andW.L.W.S. are grateful for the financial support of the NSF, through grants AST-0607485 and AST-0606868, respectively.Attached Files
Published - Ho2009p4717Astrophys_J_Suppl_S.pdf
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Additional details
- Eprint ID
- 15537
- Resolver ID
- CaltechAUTHORS:20090901-145705538
- Carnegie Institution of Washington
- NASA Hubble Fellowship
- HF-01196
- NASA
- NAS 5-26555
- NSF
- AST-0607485
- NSF
- AST-0606868
- Created
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2009-09-04Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field