Paper presented by Valentina Luridiana and Jorge García-Rojas at the IAU Symposium 283, Planetary Nebulae: an Eye to the Future, 25-29 July 2011, Tenerife, Spain.

1. A brief report on the workshop
held in Tenerife
on 25-27 October 2010
Valentina Luridiana (IAC, ULL)
Jorge García-Rojas (IAC, ULL)
Planetary
IAU 283 An eye
Nebulae
to the future 25-29 July, 2011 Puerto de la Cruz

2. rationale of the workshop
• Do uncertainties in atomic data matter? "
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

3. rationale of the workshop
HH204 (courtesy of M. Núñez-Díaz)
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

4. rationale of the workshop
• How large are uncertainties in atomic data?"
• Why are they not usually specified?"
• If they are not given, how can I estimate them?"
• How can I decide which ones to use? "
• How will they affect my final results?"
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

5. participants
PRODUCERS"
"
Aggarwal, Bautista,
Mendoza..."
USERS"
" ASSESSORS"
Stellar + nebular: "
Wesson, Bergemann, .." Ferland (Cloudy),
Del Zanna (CHIANTI),
Shaw (nebular)...
"
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

6. rationale of the workshop
• How large are uncertainties in atomic data? "
• Crucially depends on the particular calculation and its scope"
• Strong transitions better than weak transitions "
• High Te better than low Te "
• Ei better than Aij better than Ω
(Ei∼1%, Αij ~ 3-10%, Ω 5 50% or more!)"
• Why are they not usually specified?"
• If they are not given, how can I estimate them?"
• How can I decide which ones to use? "
• How will they affect my final results?"
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

7. rationale of the workshop
[Ne V] (Mendoza)
• How large are uncertainties in atomic data? "
• Crucially depends on the particular calculation and its scope"
• Strong transitions better than weak transitions "
• High Te better than low Te "
• Ei better than Aij better than Ω
(Ei∼1%, Αij ~ 3-10%, Ω 5 50% or more!)"
• Why are they not usually specified?"
• If they are not given, how can I estimate them?"
• How can I decide which ones to use? "
• How will they affect my final results?"
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

8. rationale of the workshop
• How large are uncertainties in atomic data? "
• Crucially depends on the particular calculation and its scope"
• Strong transitions better than weak transitions "
• High Te better than low Te "
• Ei better than Aij better than Ω
(Ei∼1%, Αij ~ 3-10%, Ω 5 50% or more!)"
• Why are they not usually specified?"
• If they are not given, how can I estimate them?"
• How can I decide which ones to use? "
• How will they affect my final results?"
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

9. advice to producers
• Compare explicitly to previous data "
• In case of large differences, try to understand and explain them without
making assumptions"
• Tailor your calculations to the potential market"
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

10. advice to users
• Compare among different data sets "
• Ask the authors"
• Remember that the newest data are not always the best"
• Find observational tests"
• Do not extrapolate"
• Cite the work you are using"
• Ask other modellers for their experience/opinion/assessment"
"
"
"
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

11. advice to users
Ramsbottom et al 1996
• Compare among different data sets "
• Ask the authors"
• Remember that the newest data are not always the best"
• Find observational tests"
• Do not extrapolate" Tayal & Zatsarinny 2010
• Cite the work you are using"
• Ask other modellers for their experience/opinion/assessment"
"
"
"
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

12. advice to users
• Compare among different data sets "
• Ask the authors"
• Remember that the newest data are not always the best"
• Find observational tests"
• Do not extrapolate"
• Cite the work you are using"
• Ask other modellers for their experience/opinion/assessment"
"
"
"
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

13. communication
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

14. communication
astroatom.wordpress.com
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future

15. thank you!
Planetary Nebulae
IAU 283 - Puerto de la Cruz, 25-29 July, 2011 An eye to the future