The evolution of the inner regions of protoplanetary disks

June 22, 2021 | 12:00 p.m. (UTC-6).

Virtual seminar by zoom

Passcode : 12p56xg

I will present a study of the evolution of the inner regions of protoplanetary disks around low-mass stars. We study a sample of disks in nearby stellar groups, with ages spanning from 1 to 11 Myr, and introduce a new indicator of infrared (IR) emission that allows us to measure the contribution from the disk to the total observed emission. In addition, we perform a Bayesian study to infer the dust properties of the disk that produce the observed decrease of the IR emission with age. We calculate an extensive grid of disk models and obtain their physical structure. We find that the dust in the disk settles towards the disk midplane, and this process enhances dramatically as the age increases. We also estimate photoevaporative wind mass-loss rates that agree reasonably well with observational trends. The models also show the evolution of different "snowlines" (H2O and CO), which plays and important role in the new forming planets.

Dr. Ezequiel Manzo studied a degree in Physical Mathematical Sciences at the Universidad Michoacana de San Nicolás de Hidalgo. He completed his master's and doctorate degrees at the Institute of Radioastronomy and Astrophysics of the UNAM-Campus Morelia and later obtained a postdoctoral position at the MCTP, under the supervision of Dr. Luis Felipe Rodríguez. Recently, Ezequiel obtained a postdoctoral stay at the Institute of Astronomy of the UNAM, Ensenada headquarters. His research area focuses on the study of the physical properties and evolution of protoplanetary disks using numerical codes, as well as stellar rotation in young stars and their evolution. Dr. Manzo has participated in 24 national and international conferences and has made several research stays at the Department of Astronomy at the University of Michigan, at the Center for Astrophysics at Harvard University, at the Institute of Astronomy at UNAM and at the University of Guadalajara. He has given several courses at the undergraduate level and 18 outreach talks to the general public.