Joachim's research page
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Joachim's researcher page
Research positions
- PostDoc/researcher at Uppsala university: 2021 - ongoing.
- PostDoc at Royal Observatory of Belgium: 2018 (1 May) - 2019 (30 June).
- PhD position at Chalmers university of technology: 2011 - 2016 (defended thesis 30 September 2016).
Other work experiences
- Outreach/Lecturer at Slottsskogen Observatory: September 2020 - December 2021.
- Popular science author at online editorial of Populär Astronomi: July 2017 - ongoing.
- Math and physic teacher for Swedish 7th and 9th grade: January 2017 - March 2017.
- Various observational assistant positions: November 2016, June 2017.
Links
- Github: https://github.com/jwiegert
- Researchgate: https://www.researchgate.net/profile/Joachim_Wiegert
Publications
First author
Asymmetries in AGB stars and their winds Radiative transfer of time dependent 3D RHD models J. Wiegert, B. Freytag, and S. Höfner In preparation for publication in Astronomy & Astrophysics in 2024
Asymmetries in AGB stars and their winds From 3D RHD models to synthetic observables J. Wiegert, B. Freytag, and S. Höfner To be submitted to Astronomy & Astrophysics in January 2024
How to disentangle geometry and mass-loss rate from AGB-star spectral energydistributions. The case of EP Aquarii J. Wiegert, M.A.T. Groenewegen, A. Jorissen, L. Decin, and T. Danilovich Astronomy & Astrophysics, 642, A142, 15 pp (2020) DOI: 10.1051/0004-6361/202038029 https://www.aanda.org/articles/aa/abs/2020/10/aa38029-20/aa38029-20.html
94 Ceti: a triple star with a planet and dust disc J. Wiegert, V. Faramaz, F. Cruz-Saenz de Miera Monthly Notices of the Royal Astronomical Society, 462 (2), 1735-1748 (2016) DOI: 10.1093/mnras/stw1682 https://academic.oup.com/mnras/article-abstract/462/2/1735/2589424
How dusty is alpha Centauri? Excess or non-excess over the infrared photospheres of main-sequence stars J. Wiegert, R. Liseau, P. Thébault, G. Olofsson, A. Mora, G. Bryden, J. P. Marshall, C. Eiroa, B. Montesinos, D. Ardila, J. C. Augereau, A. Bayo Aran, W. C. Danchi, C. del Burgo, S. Ertel, M. C. W. Fridlund, M. Hajigholi, A. V. Krivov, G. L. Pilbratt, A. Roberge, G. J. White, and S. Wolf Astronomy & Astrophysics, 563, A102, 15 pp (2014) DOI: 10.1051/0004-6361/201321887 http://www.aanda.org/articles/aa/abs/2014/03/aa21887-13/aa21887-13.html
Co-authored
Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 um R. Amanullah, J. Johansson, A. Goobar, [...] and J. Wiegert (39 authors) Monthly Notices of the Royal Astronomical Society, 453, 3300-3328 (2015) DOI: 10.1093/mnras/stv1505 https://academic.oup.com/mnras/article-abstract/453/3/3300/1074216
alpha Centauri A in the far infrared. First measurement of the temperature minimum of a star other than the Sun R. Liseau, B. Montesinos, G. Olofsson, G. Bryden, J. P. Marshall, D. Ardila, A. Bayo Aran, W. C. Danchi, C. del Burgo, C. Eiroa, S. Ertel, M. C. W. Fridlund, A. V. Krivov, G. L. Pilbratt, A. Roberge, P. Thébault, J. Wiegert, and G. J. White Astronomy & Astrophysics, 549, L7, 5 pp (2013) DOI: 10.1051/0004-6361/201220776 http://www.aanda.org/articles/aa/abs/2013/01/aa20776-12/aa20776-12.html
The effective stability parameter for two-component galactic discs: is Q-1 ~ Qstars-1 + Qgas-1 ? Alessandro B. Romeo, Joachim Wiegert Monthly Notices of the Royal Astronomical Society, 416, 1191–1196 (2011) DOI: 10.1111/j.1365-2966.2011.19120.x https://academic.oup.com/mnras/article/416/2/1191/1059217
Thesis
Circumstellar dust emission from nearby Solar-type stars J. Wiegert Thesis for the degree of Doctor of Philosophy, Chalmers University of Technology, Department of Earth and Space Sciences, Göteborg, Sweden 2016 ISBN 978-91-7597-443-9 http://publications.lib.chalmers.se/publication/241098-circumstellar-dust-emission-from-nearby-solar-type-stars
Gravitational Instability of Galactic Discs J. Wiegert Thesis for the degree of Master of Science, University of Gothenburg, Department of Physics, Göteborg, Sweden 2010 http://publications.lib.chalmers.se/publication/134167-gravitational-instability-of-galactic-discs
Popular science
- test
Conference contributions, letters etc.
Origin and fate of dust in our universe, Gothenburg, Sweden, 2023 Poster: Radiative transfer through 3D models of dust clouds around AGB-stars
SU+UU-conference (for early career researchers), Stockholm, Sweden, 2023 Contributing talk: 3D radiative transfer simulations of envelopes around cool giant stars
EXWINGS-Workshop, Uppsala, Sweden, 2023 Contributing talk: Radiative transfer simulations of CO5BOLD results
Astronomdagarna, Gothenburg, Sweden. 2022 Poster: 3D radiative transfer simulations of envelopes around luminous cool giant stars
The Sharpest Eyes on the Sky, Exeter, Great Britain, 2022 Poster: Simulating scattering and emission from dust around luminous cool giant stars
IAU General Assembly, symposium S343, Vienna, Austria, 2018 Poster: Exploring dust mass and dust properties of nearby AGB stars Published in conference proceedings: J. Wiegert, M. A. T. Groenewegen and the STARLAB team Cambridge University Press. Volume 14, Symposium S343 (Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time). August 2018 , pp. 542-543. (2019) DOI: 10.1017/S1743921318004982 https://publi2-as.oma.be/record/4591
Pathways towards habitable planets, Bern, Switzerland, 2015 Poster: Discs and stable orbits around the planet-hosting triple star 94 Ceti
NOT spectroscopic classifications of optical transients F. Taddia, J. Sollerman, E. Gafton, G. Micheva, E. Freeland, A. Macchiavello, T. Mansson, J. Wiegert The Astronomer's Telegram, 5087 (2013) http://www.astronomerstelegram.org/?read=5087
YERAC: Young Europan Radio Astronomers Conference, Bielefeld, Germany, 2013 Poster: The SEDs of α Centauri and the detectability of dust emission
