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Near UV Properties of Early–Type Galaxies at z ~ 1

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New Quests in Stellar Astrophysics II

Part of the book series: Astrophysics and Space Science Proceedings ((ASSSP))

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Summary

We have used spectral fits to SSP–based atmosphere models to derive an estimate of the average stellar age for an almost complete sample of 15 Early-Type Galaxies (ETG) at 0.88<z<1.3. The results are in only partial agreement with the age estimates previously obtained for the same objects from an analysis of the M/L B ratio, derived from the Fundamental Plane (FP) parameters. In particular spectral fits seem to underestimate the age of the most luminous ETG, and therefore do not reproduce the downsizing effect, which is clear for the FP ages. We also analyse the relationship between the spectral–fit ages and various near–UV spectral indices.

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Author information

Authors and Affiliations

  1. INAF – Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy

    Sperello di Serego Alighieri

  2. INAF – Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35100 Padova, Italy

    Alessandro Bressan

Authors
  1. Sperello di Serego Alighieri
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  2. Alessandro Bressan
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Correspondence to Sperello di Serego Alighieri .

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© 2009 Springer-Verlag New York

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Alighieri, S.d.S., Bressan, A. (2009). Near UV Properties of Early–Type Galaxies at z ~ 1. In: New Quests in Stellar Astrophysics II. Astrophysics and Space Science Proceedings. Springer, New York, NY. https://doi.org/10.1007/978-0-387-87621-4_4

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  • DOI: https://doi.org/10.1007/978-0-387-87621-4_4

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  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-0-387-87620-7

  • Online ISBN: 978-0-387-87621-4

  • eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)

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