Molecules and planets in the outer Galaxy: is there a boundary of the Galactic Habitable Zone?

Session

Session-4: Star-forming regions at sub-Solar metallicity: theory

4

13 Nov 2024, 11:15

Sala Capitolo (Fuligno Cenacle)

36. Star-forming regions at sub-Solar metallicity: astrochemical modelling

Serena Viti (Leiden University)

13/11/2024, 11:15

The chemistry of star forming regions heavily depend on the physical conditions of their gas. While there are many studies that have investigated such dependencies, the influence of the metallicity, as well as the initial elemental abundances, is less studied and, moreover, has only recently being investigated in the context of star forming regions in the outer galaxy. In this talk I shall...

37. Astrochemistry in extreme galactic conditions

Thomas Bisbas (Zhejiang Lab)

13/11/2024, 11:45

Photodissociation Regions (PDRs) characterize the interface between the ionized and molecular gas phases. They are dominated by the presence of far-UV photons and play an important role in understanding the chemistry and the thermal balance of the interstellar medium (ISM), since it is in these regions that the atomic-to-molecular (HI-to-H2) transition occurs. I will review recent developments...

38. Cosmic rays: shaping dynamics and chemistry in star-forming regions

Marco Padovani (Istituto Nazionale di Astrofisica (INAF))

13/11/2024, 12:15

Low-energy (<1 TeV) cosmic rays (CRs) are a key element in several physical and chemical processes of the interstellar medium, from the large scales of molecular clouds to the small scales of protostellar systems. During the last decade, significant progress has been made in understanding their transport regimes at different depths of a cloud and their interaction with magnetic fields. I will...

39. Chemical models with non-Solar metallicity

Steven Charnley

13/11/2024, 14:30

Low-energy (<1 TeV) cosmic rays (CRs) are a key element in several physical and chemical processes of the interstellar medium, from the large scales of molecular clouds to the small scales of protostellar systems. During the last decade, significant progress has been made in understanding their transport regimes at different depths of a cloud and their interaction with magnetic fields. I will...

40. Chemical modeling of Magellanic Clouds and low-metallicity clouds/hot cores

Rob Garrod (University of Virginia)

13/11/2024, 15:00

I will review the status and results of astrochemical modeling of low-metallicity clouds, including the Magellanic Clouds. A particular emphasis will be placed on the results of grain-surface/ice chemical modeling. I will also present preliminary results from our most recent hot-core chemical models, using metallicities and gas-to-dust ratios appropriate to the outer galaxy. The influence on...

41. The physics of the metallicity dependent IMF

Piyush Sharda (Leiden University)

13/11/2024, 15:30

Understanding what sets the stellar initial mass function (IMF) in diverse environments remains a critical but unanswered question in astrophysics. The mass of stars that form is closely linked to the thermodynamics of interstellar gas, which controls how gas fragments as it collapses under gravity. As the Universe has grown in metal abundance over cosmic time, this thermodynamic behaviour has...