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JRA3: Laboratory Astrophysics

JRA3: Laboratory Astrophysics. Atomic & Nuclear. Overview. Coordinator JRA3 : Wim Hermsen Two work packages: WP1 : atomic physics (coordinators Ehud Behar & Jelle Kaastra) WP2 : nuclear physics (coordinator Roland Diehl). WP1: Atomic Physics. Atomic physics.

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JRA3: Laboratory Astrophysics

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  1. JRA3: Laboratory Astrophysics Atomic & Nuclear

  2. Overview • Coordinator JRA3: Wim Hermsen • Two work packages: • WP1: atomic physics (coordinators Ehud Behar & Jelle Kaastra) • WP2: nuclear physics (coordinator Roland Diehl)

  3. WP1: Atomic Physics

  4. Atomic physics • Different physical conditions and situations in astrophysical sources: • Collisional ionisation versus Photoionisation • Emission versus absorption spectra • Foreground/Background emission and absorption from cold or ionised gas • All probed by X-ray spectroscopy

  5. Current status • For most processes, basics are understood • Accuracy & completeness of atomic data is highly inhomogeneous • Robust estimates of physical parameters in astrophysical sources often depends on subtleties of the atomic data • Need for improved data & codes, to be obtained through calculations, experiments & code development

  6. Networking & education • In addition to JRA3 research activities we propose: • Annual workshops: comparing codes & models, exchanging of new ideas (50 k, incl travel) • Combined with X-ray spectroscopy school(twice, @ 20 k each) • Example: MSSL workshop & school 17-20 March 2009, see http://www.mssl.ucl.ac.uk/~ajb/workshop3/

  7. Activity: EBIT measurements of DR • EBIT instrument @ TUB Berlin: measurements of dielectronic recombination • Plot: DR measurements compared to HULLAC calculations; other processes also desirable (e.g. for Fe&Ni-K, @ calorimeter resolution) • Needs: experimental postdoc @ TUB and computational postdoc @ Technion • Prime contacts: Biedermann, Behar DR of W, Biedermann et al. 2008

  8. Activity: further development Titan code • Titan unique amongst photoionisation codes: best treatment radiative transfer • Needs postdoc, support for further development • Prime contacts: Goosman, Gonçalves, Dumont (Strasbourg & Paris) Gonçalves et al. (2006)

  9. Activity: lab measurements for warm absorbers • Goal: measure inner-shell absorption structures through lab (e.g. laser) experiments • Need support for equipment experiments (10 k/yr?) & theor. backup (0.5 postdoc) • Contact: Gonçalves (Paris), Behar Chenais-Popovic et al. 2000

  10. Activity: update atomic data SPEX • Goal: improve atomic data in multi-tasking spectral analysis code SPEX (and others) • Time-consuming, • Need 0.4 staff for calculations, + support postdoc for maintenance/update code at SRON • Contact: Kaastra, Raassen, Behar

  11. Activity: implementing atomic data into applications • Chianti project computes/collects/compiles large database atomic data for astrophysics • Data needs to be incorporated into astrophysical applications, e.g. SPEX • Careful assessment and benchmarking / comparison codes (Cloudy, XSTAR, SPEX, etc.) needed • Needs postdoc @ IoA/DAMTP • Contacts: Blustin, Fabian, Del Zanna

  12. Activity: update Fe-K diagnostics high-Z elements • Recent computational work by group Palmeri et al. on Fe-K data • Needs extension to other high-Z elements (Astro-H, IXO) • Needs postdoc @ Mons • Contact: Palmeri Palmeri et al. 2003, Fe-K

  13. WP2: Nuclear Physics

  14. Introduction • Nuclear fusion reactions determine HE sources • Nuclear properties needed to interpret γ-ray line intensities • Nuclear interactions: key importance in instrumental backgrounds

  15. Nuclear physics ingredients • Nuclear properties & cross section measurements in lab & theory • Instrumental interaction simulation packages (GEANT), in-orbit radiation environment monitors & simulators

  16. Activity: stimulate HEA implementing nuclear physics workshops & projects Cosmic HE source models • Extract nucleosynthesis yields from SN models (cc-SNe, SNIa) • Extract HE continuum light curves versus nucl. energy productions • Explore variations observable parameters for model discriminations • Needs: infrastructure, travel money (~50-70 k€/y) Instrument simulations • Exploit nuclear physics experiments, theoretical models, databases for isotope properties • Needs: 1 Postdoc (~100 k€/y)

  17. Activity: enhance manpower / resources for instrument simulations through projects • MGGPOD (Monte Carlo code) as part of GEANT: benchmarks for known materials, cmp. measurements • Instrument-specific simulation package development & benchmarks (Compton telescopes, others) • Needs 3 Postdocs + travel (~180 k€/y)

  18. Activity: enhance nucl-phys applications for HEA: nuclear spectroscopy • Benchmarks for spectroscopic analysis known source data • Performance & analysis radioactive-source and γ-beam tests • Exploration instrumental line suppression tools & algorithms • Needs: 1 Postdoc + travel (~60 k€/y)

  19. Activity: establish space particle environment libs & tools for HEA • Compile & extract space environment lib • Exploit / extract available databases wrt. HE needs • Establish background model lib for HE Instruments • Needs: infrastructure, 1 Postdoc (~100 k€/y)

  20. Summary of requested annual budgets • WP1: 475 k€/yr • WP2: 500 k€/yr • JRA3 total: 975 k€/yr • Warning: these are all preliminary estimates!

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