Age-dating the Tully-Fisher relation at moderate redshift
- Autor(en)
- Ignacio Ferreras, Asmus Böhm, Bodo Ziegler, Joseph Silk
- Abstrakt
We analyse the Tully-Fisher relation at moderate redshift from the point of view of the underlying stellar populations, by comparing optical and NIR photometry with a phenomenological model that combines population synthesis with a simple prescription for chemical enrichment. The sample comprises 108 late-type galaxies extracted from the FORS Deep Field and William Herschel Deep Field surveys at z ≲ 1 (median redshift z = 0.45). A correlation is found between stellar mass and the parameters that describe the star formation history, with massive galaxies forming their populations early (z
FOR ~ 3), with star formation timescales, τ
1 ~ 4 Gyr, although with very efficient chemical enrichment time-scales (τ
2 ~ 1Gyr). In contrast, the stellar-to-dynamical mass ratio - which, in principle, would track the efficiency of feedback in the baryonic processes driving galaxy formation - does not appear to correlate with the model parameters. On the Tully-Fisher plane, no significant age segregation is found at fixed circular speed, whereas at fixed stellar-to-dynamical mass fraction, age splits the sample, with older galaxies having faster circular speeds at fixed M
s/M
dyn. Although our model does not introduce any prior constraint on dust reddening, we obtain a strong correlation between colour excess and stellar mass.
- Organisation(en)
- Institut für Astrophysik
- Externe Organisation(en)
- University College London, Leopold-Franzens-Universität Innsbruck, Université Paris VI - Pierre-et-Marie-Curie
- Journal
- Monthly Notices of the Royal Astronomical Society
- Band
- 437
- Seiten
- 1872 - 1881
- Anzahl der Seiten
- 10
- ISSN
- 0035-8711
- DOI
- https://doi.org/10.1093/mnras/stt2018
- Publikationsdatum
- 01-2014
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103003 Astronomie, 103004 Astrophysik
- Schlagwörter
- ASJC Scopus Sachgebiete
- Astronomy and Astrophysics, Space and Planetary Science
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/bb74e67a-5951-41ba-9673-d53b6d132aff