The importance of the diffuse ionized gas and dust attenuation for global properties of galaxies
Natalia Vale Asari
Universidade Federal de Santa Catarina, BR
The chemical evolution of galaxies is driven by both internal processes (star formation, recycling of gas from previous generations of stars) and external ones (inflow and outflow of gas, interaction with other galaxies). Those processes get imprinted in global properties of galaxies, such as their stellar masses, gas mass fractions and chemical abundances. Empirical relations between those global properties are thus a keystone to understanding the evolution of galaxies. In this seminar, I will discuss the role of the diffuse ionized gas and the inhomogeneities in dust attenuation for the stellar mass, gas-phase metallicity and star formation rate empirical relation. The diffuse gas biases abundance measurements based on strong line methods, while simple dust attenuation corrections yield too small star formation rates. Using integral field spectroscopy data, I will show how we may take into account those effects, and the extent to which they affect empirical galaxy laws.
I did my PhD in cotutelle at UFSC and Observatoire de Paris (France), having finished in 2010. Then I held a postdoc position in Cambridge (UK). I have been a professor at Universidade Federal de Santa Catarina since 2014. In 2018 I got a Newton Advanced–Royal Society fellowship, which allowed me to take a sabbatical leave in St Andrews, Scotland. In 2019 I received the Carolina Nemes prize given to early-career female physicists by the Brazilian Society of Physics.
Google Meet: https://meet.google.com/pcw-gmem-jyi
Link da transmissão: https://www.youtube.com/c/AstronomiaIAGUSP/live