Thesis Topic: The interstellar medium (ISM) in high-redshift galaxies
Thesis Supervisor: Paola Andreani
(Aristotle University of Thessaloniki, Greece)
(University of Bologna, Italy)
(Najin University, China
The interstellar medium of high redshift galaxies can be investigated through the emission lines of the atoms and molecules present in the various phases of the gas in the galaxy disc and the thermal emission from dust. Tracing the various stages of the gas (warm, cold, molecular) and its relation to the dust is key to understand the initial conditions of star formation and the type of the stellar initial mass function, therefore it provides information on the star formation processes in the galaxy.
Many Atomic and Molecular lines are accessible with the ALMA array and with submm single dishes like APEX and several observations are available for high redshift sources. In particular key is the combination of molecule emission (CO and others) and the Atomic Carbon lines which when studied together are able to shed light on the thermal state of the ISM and on the mechanism at play heating the gas and the dust.
The project aims at looking at ALMA and APEX data of various sources at high and low redshift and at making a physical study of the status of the ISM by investigating Atomic Carbon, CI, ionised Carbon, C+, and Carbon Monoxide, CO, and other tracers of the warm and cold gas present in star-forming regions of the galaxy discs.
The thesis will be tailored to the student's preference and skills.
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