A search for "dwarf" seyfert nuclei. VII. a catalog of central stellar velocity dispersions of nearby galaxies

Luis C. Ho, Jenny E. Greene, Alexei V. Filippenko, Wallace L.W. Sargent

Research output: Contribution to journalArticle

81 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)1-16
Number of pages16
JournalAstrophysical Journal, Supplement Series
Volume183
Issue number1
DOIs
StatePublished - 2009

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Galaxies: Seyfert
  • Galaxies: active
  • Galaxies: kinematics and dynamics
  • Galaxies: nuclei
  • Galaxies: starburst
  • Surveys

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