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Issue A&A
Volume 445, Number 1, January I 2006
Page(s) 79 - 91
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20053754



A&A 445, 79-91 (2006)
DOI: 10.1051/0004-6361:20053754

Nearby early-type galaxies with ionized gas

II. Line-strength indices for 18 additional galaxies
F. Annibali1, A. Bressan1, 2, R. Rampazzo2 and W. W. Zeilinger3

1  SISSA, via Beirut 4, 34014 Trieste, Italy
    e-mail: annibali@sissa.it, annibali@stsci.edu
2  INAF - Osservatorio Astronomico di Padova, vicolo dell'Osservatorio 5, 35122 Padova, Italy
3  Institut für Astronomie der Universität Wien, Türkenschanzstraße 17, 1180 Wien, Austria

(Received 4 July 2005 / Accepted 4 August 2005 )

Abstract
We previously presented a data-set of line-strength indices for 50 early-type galaxies in the nearby Universe. The galaxy sample is biased toward galaxies showing emission lines, located in environments corresponding to a broad range of local galaxy densities, although predominantly in low density environments. The present addendum enlarges the above data-set of line-strength indices by analyzing 18 additional early-type galaxies (three galaxies, NGC 3607, NGC 5077 and NGC 5898 were presented in the previous set). We measured 25 line-strength indices, defined by the Lick IDS "standard" system (Trager et al. 1998, ApJS, 116, 1; Worthey & Ottaviani 1997, ApJS, 111, 377), for 7 luminosity weighted apertures and 4 gradients of each galaxy. This addendum presents the line-strength data-set and compares it with the available data in the literature.


Key words: galaxies: elliptical and lenticular, cD -- galaxies: fundamental parameters -- galaxies: formation -- galaxies: evolution

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© ESO 2005


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