Dr. Stephan Hachinger
Leibniz Supercomputing Centre (LRZ)
Research Department / Forschung
85748 Garching b. München
Projects and collaborations
At LRZ, I am working with local and international collaborators mainly on research data management (RDM), computing-infrastructure, geoscience and atmospheric science projects.
My main projects:
Projects I was involved in in the past:
- LEXIS (Large Scale Execution for Industry and Society, EU H2020 Grant #825532)
- Lead of Work Package 3 (LEXIS Data System) - development of LEXIS's approach to distributed data management.
- Coordination of LRZ activities in LEXIS.
- ViWA (Virtual Water Values)
- Data Management for ViWA.
- Porting of the PROMET land-use/hydrology model (Mauser & Bach 2009) to massively parallel LRZ systems.
- Optimisation of PROMET for LRZ systems (e.g. for MPI-parallel runs).
Teams at LRZ:
- AlpEnDAC and BioClis (Alpine Environmental Data Analysis Centre / Virtual Alpine Observatory, Bio-Climatic Information System)
- Computing on Demand (CoD): Simulations (particle transport, etc. on the LRZ Compute Cloud)
as a "on-click" service in the AlpEnDAC portal.
- Design and maintenance of the AlpEnDAC software stack on the LRZ Compute Cloud,
including optimisation/parallelisation of the simulation codes used for CoD.
- Set-up of semi-operational simulation workflows of weather and air-mass transport (air quality) in the context of the BioClis project and AlpEnDAC.
- Concept and maintenance of the AlpEnDAC iRODS system for distributed data/metadata management within the AlpEnDAC.
- Consulting and dissemination, conferences, co-design of follow-up projects.
- COMPAT (Computing Patterns for High Performance Multiscale Computing)
- Maintenance of grid-computing infrastructure.
- Support with LRZ systems.
Important further collaborations of mine:
- RDM Team (Research Data Management Team, within LRZ's Research Department) - coordinated by me
- Harmonisation of RDM efforts (AlpEnDAC, GeRDI, ...) LRZ is involved in together with colleagues.
- Dissemination, consulting, proposal writing, competence building.
- Environmental Computing Team (within LRZ's Research Department)
- Project activities (AlpEnDAC, BioClis, ViWA, etc.) - coordination with colleagues.
- Dissemination and proposal writing.
- Application Labs (AstroLab, GeoLab)
- Helping with customer support on application porting/optimisation.
- Helping with organisational contributions.
- VERCE - Virtual Earthquake and Seismology Research Community in Europe
A blast from the past: my research in astrophysics
I have worked on exploding stars (supernovae, SNe) for a couple of years - more specifically, on transport phenomena of the emergent radiation:
- Type I supernova radiative transfer simulations
- Type Ia supernovae: analysis of the ejecta (density profile/abundances) from observed spectra. This gives hints on how these SNe explode, and what the progenitor stars are.
- Type Ib/Ic/IIb supernovae: analysis of the H/He envelope from observed spectra - determination of H and He masses and of the outer density profile.
- Radiative transfer / NLTE plasma state solvers which you need for these.
Here you can have a look at some of that work using the NASA Astrophysics Data System:
- Hachinger S. et al.: Type Ia supernovae with and without blueshifted narrow Na I D lines -
how different is their structure?, 2017, MNRAS, 471, 491
- Hachinger S. et al.: The UV/optical spectra of the Type Ia supernova SN 2010jn: a bright
supernova with outer layers rich in iron-group elements, 2013, MNRAS, 429, 2228
- Hachinger S., Mazzali P. A., Taubenberger S., Fink M., Pakmor R., Hillebrandt W., Seitenzahl, I. R.: Spectral modelling of the "super-Chandrasekhar" Type Ia SN 2009dc: testing a 2-solar-mass white dwarf explosion model and alternatives, 2012, MNRAS, 427, 2057
- Hachinger S. et al.: How much H and He is "hidden" in SNe Ib/c? I. - low-mass objects,
2012, MNRAS, 422, 70
- Hachinger S., Mazzali P. A., Taubenberger S., Pakmor R., Hillebrandt W.: Spectral analysis
of the 91bg-like Type Ia SN 2005bl: low luminosity, low velocities, incomplete burning,
2009, MNRAS, 399, 1238
- Hachinger S., Mazzali P. A., Tanaka M., Hillebrandt W., Benetti S.: Spectral luminosity indicators in Type Ia supernovae. Understanding the R(Si II) line-strength ratio and beyond, 2008, MNRAS, 389, 1087
- Hachinger S., Mazzali P. A., Benetti S.: Exploring the spectroscopic diversity of
Type Ia supernovae, 2006, MNRAS, 370, 299
Last not least - for legal reasons - I need to mention that for these sites the following regulations apply:
The contents of this webspace are administred by me (with me taking the responsibility) and do not necessarily reflect opinions of LRZ.