Nebular, a long-time reference                                                                                            ...
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From nebular to pynebular: a new package for the analysis of emission lines


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Poster presented by . Luridiana, C. Morisset, R.A. Shaw, D. Díaz-González at the IAU Symposium 283, Planetary Nebulae: an Eye to the Future, 25-29 July 2011, Tenerife, Spain.

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From nebular to pynebular: a new package for the analysis of emission lines

  1. 1. Nebular, a long-time reference package for the analysis of emission lines, started as a simple Fortran program and evolved into a nebular is being migrated powerful IRAF package. to a new environment, to make it more powerful In essence, nebular works by solving the equilibrium equations and user-friendly... for an n-level atom. These are some of the things nebular is able to compute: - physical conditions from suitable dignostic line ratios. - level populations, critical densities and line emissivities - 3-zone nebula models from sets of line ratios - dereddened line intensities Now nebular is being recasted in python and will become pyneb. pyneb is being designed to be more user-friendly and powerful than its predecessor. Here are some of the improvements: Emission maps as a function of temperature and density Fully user-defined and more Fully user-selectable atomic data numerous diagnostics y! he es r s t he line ! IR too Contour maps of diagnostic line ratios as a function of Te and Ne Full access to input data or intermediate and YES! a web interface: quantities a long way to go, but heres a prototype: One of them is a tool for the Dynamic plotting of extinction And there are many, many more features we intend to implement... for example: - Computation of elemental abundance using ICFs. - User-selectable and user-definable ICFs - Tools to perform error analysis of Ne, Te and abundances - Ionic abundances for He and other elements from recombination lines Wanna be a beta tester? Sign here or send us an email ( Valentina Luridiana (vale AT References Wishing a particular feature was there? ChristopheMorisset  De Robertis, M. M., Dufour, R. J., & Hunt, R. W. 1987, JRASC, 81, 195 Tell us or describe it here: Dick Shaw: shaw@ AT noao.eduShaw, R. A., de La Pena, M. D., Katsanis, R. M., & Williams, R. E. 1998, in ADASS VII, R. Albrecht, R. N. Hook, & H. A. Bushouse eds, ASP Conf. Series, 145, 192Shaw, R. A., & Dufour, R. J. 1995, PASP, 107, 896Acknowledgments: Manuel Núñez-Díaz kindly gave us his HH 204 data