Postdoctoral position in Theoretical Astrophysics
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Duties/Project description: Evolved stars play a crucial role for the cosmic matter cycle and the origin of life. Critical chemical elements, like carbon, are produced inside luminous cool giant stars, transported to the surface by turbulent gas flows, and ejected into interstellar space by massive outflows of gas and dust. The current knowledge of stellar winds is incomplete, and does not allow us to fully understand their effects on the evolution of stars, and how they enrich their surroundings with newly produced elements and cosmic dust. Project EXWINGS, funded by the European Research Council with an ERC Advanced Grant, aims at a breakthrough in understanding the winds of cool giant and supergiant stars by developing a new type of models: global dynamical star-and-wind-in-a-box simulations, in full 3D geometry. Astronomical instruments with high spatial resolution, which give images of the stellar atmospheres where the winds originate, will allow us to test the new models.
The post-doctoral researcher will work together with Susanne Höfner, Bernd Freytag, and other EXWINGS team members on studying the interplay of dynamical processes in the stellar interior (convection, pulsation) with physical phenomena (shocks, dust formation, emergence of complex structures) in the extended atmosphere, where the stellar wind has its origin. Comparing a new generation of dynamic models for Asymptotic Giant Branch (AGB) and red supergiant (RSG) stars to state-of-the-art observations, the mechanisms which drive their winds will be explored. More information on project EXWINGS and the stellar winds research group can be found at https://www.physics.uu.se/research/research-funding/european-research-council/exwings/ and https://www.physics.uu.se/research/astronomy-and-space-physics/research/stars/Stellar+winds/.
Requirements: To qualify for an employment as a postdoctor you must have a PhD degree or a foreign degree equivalent to a PhD degree in Astronomy or Physics. The PhD degree must have been obtained no more than three years prior to the application deadline. The three year period can be extended due to circumstances such as sick leave, parental leave, duties in labour unions, etc. Furthermore, candidates should be fluent in English and have the capacity to work both independently and in collaboration with the team. Applications should include a brief description of research interests and relevant experience, CV, copies of university grades, certificates and diplomas, and contact details for at least one reference person.
Additional qualifications: Practical experience with relevant numerical simulations (gas dynamics, radiative transfer), or with observational techniques (e.g. spectroscopy, interferometry) applied to AGB and RSG stars, will be considered a merit.
Salary: Individual salary.
Starting date: 01-09-2021 or as otherwise agreed.
Type of employment: Temporary 2 year position according to central collective agreement.
Scope of employment: 100 %.
For further information about the position please contact: Susanne Höfner (firstname.lastname@example.org), Professor of Theoretical Astrophysics.
Please submit your application by 17 May 2021, UFV-PA 2021/1015.
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Placement: Department of Physics and Astronomy
Type of employment: Full time , Temporary position longer than 6 months
Pay: Fixed salary
Number of positions: 1
Working hours: 100%
County: Uppsala län
Number of reference: UFV-PA 2021/1015
Last application date: 2021-05-17
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