Partecipanti: Leslie Hunt, (INAF, Osservatorio Astrofisico di Arcetri)
Abstract
Scaling relations of stellar mass (Mstar), star-formation rate (SFR), andmetallicity (O/H) provide strong clues for how galaxies evolve over cosmictime.
This talk will explore correlations of stellar mass, SFR, and O/H fromredshift z=0 to z<=3.5 based on a sample of ~1000 star-forming galaxies withmetallicity measurements spanning almost a factor of 100. Results suggest thatspecific SFR and O/H mutually evolve in a way that makes the scaling relationsof Mstar, O/H, and SFR redshift invariant, at least over the redshift range ofthe sample.
To gain insight into a physical understanding of the trends,predictions of recent theoretical models will also be discussed.
Comparingmodel predictions with data indicates that the properties of gas outflowthrough galactic winds and gas accretion do not change significantly withcosmic time, but rather that the redshift invariance is a consequence of otherchanges in the way galaxies evolve.
Next seminars:
- Thursday September 24th, at 14:00 Gisella Clementini (INAF, Osservatorio Astronomico di Bologna)
- Thursday October 1st, at 17:00, Aula della Specola (Via Zamboni 33) Roberto Battiston (Università di Trento)
- Thursday October 8th, at 14:00 Elio Antonello (INAF, Osservatorio Astronomico di Brera)
- Thursday October 15th, at 14:00 Mara Salvato (MPE, Garching, DE)
The complete list of seminars is available at: http://davide2.bo.astro.it/?page_id=4531
The organizers of seminars: