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Stellar velocity dispersion in NLS1 galaxies

Published online by Cambridge University Press:  24 November 2004

V. Botte ,
S. Ciroi ,
F. Di Mille ,
P. Rafanelli  and
A. Romano
V. Botte
Affiliation:
Department of Astronomy, University of Padua, Vicolo dell'Osservatorio, 2, I-35122 Padova, Italy
S. Ciroi
Affiliation:
Department of Astronomy, University of Padua, Vicolo dell'Osservatorio, 2, I-35122 Padova, Italy
F. Di Mille
Affiliation:
Department of Astronomy, University of Padua, Vicolo dell'Osservatorio, 2, I-35122 Padova, Italy
P. Rafanelli
Affiliation:
Department of Astronomy, University of Padua, Vicolo dell'Osservatorio, 2, I-35122 Padova, Italy
A. Romano
Affiliation:
Department of Astronomy, University of Padua, Vicolo dell'Osservatorio, 2, I-35122 Padova, Italy
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Abstract

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Measuring stellar velocity dispersion (σ) in Narrow-Line Seyfert 1 (NLS1) with optical spectra, can be very difficult because of the large and bright Fe II multiplets, which completely suppress the typically used stellar absorption lines. Indeed, σ values are to date available only for 2 NLS1s. Here we present new σ measurements of three NLS1s observed in the spectral range centered around the Ca II triplet (λ∼8600Å). Moreover, we compare σ with the gaseous velocity dispersion finding that the σ = FWHM([O III]5007Å)/2.35 relation (Nelson & Whittle 1995) is not satisfied by our galaxies.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
POSTERS
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS222 , March 2004 , pp. 159 - 160
Copyright
© 2004 International Astronomical Union