I'm Roger Wesson, an astronomer working at Cardiff University, where I investigate the dust associated with core-collapse supernovae and their progenitors. Previously I was at University College London, working in the sndust group. Before that, I spent four years in Chile, where I was a Fellow at the European Southern Observatory and spent 80 nights a year supporting operations at the Very Large Telescope, including nighttime support on UT3 (Melipal). And before ESO, I was an undergraduate, postgraduate and postdoc at UCL. These pages contain information about my research.
I'm interested in two main topics: firstly, core-collapse supernovae and the dust they produce. How much do they make, when do they make it, and what ultimately happens to it? And secondly, chemical abundances in planetary nebulae and HII regions. These objects are now believed to contain some amount of cold, hydrogen-deficient gas, which affects abundance measurements. What is the origin of this material? Can we constrain its physical conditions and determine accurately the total heavy element content of these nebulae?
My most recent 5 publications:
- August 2022: Dust masses for a large sample of core-collapse supernovae from optical emission line asymmetries: dust formation on 30-year time-scales
Niculescu-Duvaz, Maria, Barlow, M. J., Bevan, A., Wesson, R., Milisavljevic, D., De Looze, I., Clayton, G. C., Krafton, K., et al.
- July 2022: SOFIA/HAWC+ observations of the Crab Nebula: dust properties from polarised emission
Chastenet, Jérémy, De Looze, Ilse, Hensley, Brandon S., Vandenbroucke, Bert, Barlow, Mike J., Rho, Jeonghee, Ravi, Aravind P., Gomez, Haley L., et al.
- June 2022: Inferring properties of dust in supernovae with neural networks
Ansari, Zoe, Gall, Christa, Wesson, Roger, Krause, Oswin
- May 2022: Quantifying the dust in SN 2012aw and iPTF14hls with ORBYTS
Niculescu-Duvaz, Maria, Barlow, M. J., Dunn, W., Bevan, A., Ahmed, Omar, Arkless, David, Barker, Jon, Bartolotta, Sidney, et al.
- April 2022: VizieR Online Data Catalog: Extreme abundance discrepancy factors in PNe (Wesson+, 2018)
Wesson, R., Jones, D., Garcia-Rojas, J., Boffin, H. M. J., Corradi, R. L. M.
Some of the codes I've written:
- alfa - automated line fitting algorithm
- neat - nebular empirical analysis tool
- astro-ph sorter - list up to 30 days of astro-ph abstracts, sorted according to your research interests
- airmass.org - visibility plotting tool for observation planning
See more on my codes page.