Metallicities and Dust in High-<i>z</i> Galaxies

Möller, Claudia; Alvensleben, U. Fritze–v.; Calzetti, D.; Fricke, K. J.

doi:10.1017/s0074180900226338

Cited by 3 publications

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“…7. A further set of models which also includes the influence of dust in a chemically consistent way will be presented a separate paper (see Möller et al 2001a,b for first results). A detailed interpretation of the HDF data with the models presented here will be the subject of a forthcoming paper.…”

Section: Introductionmentioning

confidence: 99%

Chemically consistent evolution of galaxies

Bicker¹,

Alvensleben²,

Möller³

et al. 2003

A&A

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Abstract. The composite stellar populations of galaxies comprise stars of a wide range of metallicities. Subsolar metallicities become increasingly important, both in the local universe when going from early towards later galaxy types as well as for dwarf galaxies and for all types of galaxies towards higher redshifts. We present a new generation of chemically consistent evolutionary synthesis models for galaxies of various spectral types from E through Sd. The models follow the chemical enrichment of the ISM and take into account the increasing initial metallicity of successive stellar generations using recently published metallicity dependent stellar evolutionary isochrones, spectra and yields. Our first set of closed-box 1-zone models does not include any spatial resolution or dynamics. For a Salpeter initial mass function (IMF) the star formation rate (SFR) and its time evolution are shown to successfully parameterise spectral galaxy types E, ..., Sd. We show how the stellar metallicity distribution in various galaxy types build up with time to yield after ∼12 Gyr agreement with stellar metallicity distributions observed in our and other local galaxies. The models give integrated galaxy spectra over a wide wavelength range (90.9 Å-160 µm), which for ages of ∼12 Gyr are in good agreement not only with observed broad band colours but also with template spectra for the respective galaxy types. Using filter functions for Johnson-Cousins U, B, V, R C , I C , as well as for HST broad band filters in the optical and Bessel & Brett's NIR J, H, K filter system, we calculate the luminosity and colour evolution of model galaxies over a Hubble time. Including a standard cosmological model (H 0 = 65, Ω 0 = 0.1) and the attenuation by intergalactic hydrogen we present evolutionary and cosmological corrections as well as apparent luminosities in various filters over the redshift range from z ∼ 5 to the present for our galaxy types and compare to earlier models using single (=solar) metallicity input physics only. We also resent a first comparison of our cc models to HDF data. A more detailed comparison with Hubble Deep Field (HDF) and other deep field data and an analysis and interpretation of high redshift galaxies in terms of ages, metallicities, star formation histories and, galaxy types will be the subject of a forthcoming paper.

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Section: Introductionmentioning

confidence: 99%

Chemically consistent evolution of galaxies

Bicker¹,

Alvensleben²,

Möller³

et al. 2003

A&A

Self Cite

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“…A great deal of attention has been paid recently to improving existing methods of solvent recovery. Conventional systems are now being supplemented by techniques such as inert-gas purging (the inert gas being generated by burning some of the solvent) [420] and vacuum distillation (in place of steam stripping of activated carbon absorbers) for high-boiling-point lithographic solvents [421].…”

Section: Solvent Recoverymentioning

confidence: 99%

“…HOT-AIR DRYING Conventional high-velocity, hot-air drying has seen a number of improvements as a result of detailed thermodynamic and aerodynamic studies of the drying process (423-4 2 6 ) . Increased efficiency has resulted from the replacement of solvent after-burners by solvent-recovery systems of improved pattern [420,421] . Low-energy, heat-set inks, which partially set on contact with paper, are under development (427) OVERCOATINGS One method of solving set-off problems has been to apply fast-drying coatings in-line with the press [ 4 2 8 ] .…”

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The Printing of Paper and Packaging Materials

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1978

Review of Progress in Coloration and Related Topics

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Gravitationally lensed high redshift galaxies in the field of 1E0657-56

Mehlert¹,

Seitz

Saglia

et al. 2001

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Abstract. We present images and long-slit spectra obtained with FORS1 at UT1 of the VLT centered on the gravitational arc of the galaxy cluster 1E0657-56 (z = 0.296). The cluster is one of the hottest, most massive clusters known so far and acts as a powerful gravitational telescope, amplifying the flux of background sources by up to a factor of 20. We present photometric results together with the spectra of the gravitational arc (z = 3.24) and four additional amplified high redshift objects (z = 2.34 to 3.08) that were also included in the slit by chance coincidence. A magnification map has been obtained from a lens model derived from the multiple image systems. We compare our observed spectra with models and briefly discuss the stellar contents of these galaxies. Furthermore we measured the equivalent widths of the C iv 1550 and Si iv 1400 absorption lines for the objects behind 1E0657-56 studied here, as well as for some additional starburst galaxies (nearby and at high z). For C iv we find an increasing absorption equivalent width with decreasing redshift. We discuss whether this correlation could be related to the increase of metallicity with the age of the universe.

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Metallicities and Dust in High-z Galaxies

Cited by 3 publications

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Chemically consistent evolution of galaxies

Chemically consistent evolution of galaxies

The Printing of Paper and Packaging Materials

Gravitationally lensed high redshift galaxies in the field of 1E0657-56

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