Planetary Group Seminar: Chemistry at the dawn of star formation and links to our Solar System (P. Caselli)

  • Datum: 24.02.2016
  • Uhrzeit: 11:00 - 12:00
  • Vortragende(r): Paola Caselli
  • Max Planck Institute for Extraterrestrial Physics, Garching
  • Ort: MPS
  • Raum: Auditorium
  • Gastgeber: Urs Mall
Planetary Group Seminar: Chemistry at the dawn of star formation and links to our Solar System (P. Caselli)

Before the formation of Sun-like stars, molecular clouds in our Galaxy fragment and produce dense regions called pre-stellar cores. These objects represent the initial conditions in the process of star and planet formation. They are cold (kinetic temperature < 10 K), dense (number density of H2 molecules > 10^5 cm^-3, at least ten times higher than the surrounding parent cloud), and quiescent (line broadening is dominated by thermal motions). Dust grains are covered with thick icy mantles and the first steps toward Deuterium and 15N enrichments, also measured in comets, meteorites and on Earth, proceed at these early stages. Here, I shall discuss our understanding of the chemical structure of pre-stellar and protostellar cores, as well as recent theoretical predictions about protoplanetary disks in their earliest phases of evolution. Links to our own Solar System will be made.

Zur Redakteursansicht