Details

Autor(en) / Beteiligte

• Goudfrooij, Paul
• Gorgas, Javier
• Jablonka, Pascale

Titel

Line Strengths and Line Strength Gradients in Bulges along the Hubble Sequence

Ist Teil von

• Astrophysics and space science, 1999-12, Vol.269-270, p.109-116

Ort / Verlag

Dordrecht: Springer Nature B.V

Erscheinungsjahr

1999

Quelle

SpringerLINK Contemporary (Konsortium Baden-Württemberg)

Beschreibungen/Notizen

• We present first results of a comprehensive survey of deep long-slit spectra along the minor axis of bulges of edge-on spiral galaxies. Our results indicate that stellar populations in bulges are fairly old and encompass a range of metallicities. The luminosity-weighted ages of bulges range from those found for cluster ellipticals to slightly `younger' (by up to only a few Gyr, however). Their α/Fe element ratio is typically supersolar, consistent with those found in giant ellipticals. The radial line-strength gradients in bulges correlate with bulge luminosity. Generally, these findings are more compatible with predictions of the `dissipative collapse' model than with those of the `secular evolution' model.[PUBLICATION ABSTRACT]