STARLIB: A Next-Generation Reaction-Rate Library for Nuclear Astrophysics

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Champagne University of North Carolina, Chapel Hill/Triangle Universities Nuclear

1 STARLIB: A Next-Generation Reaction-Rate Library for Nuclear Astrophysics Anne L. Sallaska C. Iliadis, A. E. Champagne University of North Carolina, Chapel Hill/Triangle Universities Nuclear Laboratory F. X. Timmes, S. Starrfield Arizona State University XII International Symposium on Nuclei in the Cosmos: Lunchtime Workshop August

2 LR Cumulative probability F(x) MR HR Probability f(x) (arb. units) Introduction STARLIB: tabular reaction rate library for stellar modelers. Includes: Uncertainties on rates Information to build realistic rate probability density functions (PDFs) (a) Structure based on Monte Carlo method to calculate experimental reaction rates Input: assign physically motivated PDF to each nuclear physics parameter Output: the rate PDF Low, median, and high rates are defined in a statistically rigorous manner % 50% 16% Reaction rate (cm mol s -1 ) (b) NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 2

LR Cumulative probability F(x) MR HR Probability f(x) (arb. units) STARLIB Library Header Chapter number, interacting nuclei, source, Q-value 0.004 (a) 0.

3 LR Cumulative probability F(x) MR HR Probability f(x) (arb. units) STARLIB Library Header Chapter number, interacting nuclei, source, Q-value (a) columns Temperature Rate 1 MK 10 GK Thermonuclear rate [cm 3 mol -1 s -1 ] Decay constant of photodisintigration or beta decay [s -1 ] Factor uncertainty Rate = e m f.u. = e s all ingredients for rate PDF % 50% 16% f (x;m,s ) = exp[-(ln x - m) 2 / (2s 2 )] s 2p x Reaction rate (cm mol s -1 ) (b) NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 3

4 starlib.physics.unc.edu Rate Library Rate Calculator Details NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 4

5 Rate Library Download entire library Download subset of library Display an individual rate NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 5

6 Option to chose archived libraries 3 menu options to display individual rate Click? to display formatting examples Download entire library Upload list of nuclei for library subset NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 6

7 STARLIB version Reaction name Source (hyperlinked) Q value Temperature Rate Factor uncertainty NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 7

8 Rate Calculator Display our MC input files Run MC on our server Monitor simulation progress Download output files NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 8

9 Preparing for the Simulation Repository for MC input files Because of formatting, we recommend editing an existing file Input file displayed here NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 9

10 Starting and Monitoring the Simulation Enter address to: Start simulation Monitor simulation Access output files NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 10

remaining Abort * Upon completion, alert email sent to

11 Monitoring the Simulation Job ID issued upon submission Monitor: Job ID Status Run time Progress Estimated time remaining Abort * Upon completion, alert sent to address provided * NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 11

12 Monitoring the Simulation and Accessing Output Files Monitor simulation Access output files NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 12

13 Access Files Files tagged with: Reaction name Job ID *.in: input *.out: output *.hist: binned PDF *.latex: output in Latex format Clean up files NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 13

Upper limit properties: E R, G p limit, etc. Iliadis et al., Nucl. Phys A841, 31 (2010).

14 Input and Output Files Low rate Median rate High rate Reaction properties: masses, Q-values, spins, etc. Lognormal parameters: m, s Resonance properties: E R, wg, etc. Upper limit properties: E R, G p limit, etc. Iliadis et al., Nucl. Phys A841, 31 (2010). Iliadis et al., Nucl. Phys A841, 251 (2010). NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 14

15 Details Construction of library Library formatting All references and links to original papers Information on STALRIB updates NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 15

16 Thank you! starlib.physics.unc.edu See Poster 242 for more details NIC 8/6/12: starlib.physics.unc.edu A. L. Sallaska 16

Physics 736. Experimental Methods in Nuclear-, Particle-, and Astrophysics. - Statistics and Error Analysis -

Physics 736. Experimental Methods in Nuclear-, Particle-, and Astrophysics. - Statistics and Error Analysis - Physics 736 Experimental Methods in Nuclear-, Particle-, and Astrophysics - Statistics and Error Analysis - Karsten Heeger heeger@wisc.edu Feldman&Cousin what are the issues they deal with? what processes