luridiana
DESCRIPTION
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.TRANSCRIPT
Valentina Luridiana (IAC, ULL) Jorge García-Rojas (IAC, ULL)
A brief report on the workshop held in Tenerife
on 25-27 October 2010
IAU 283 Planetary
An eye Nebulae to the future 25-29 July, 2011 Puerto de la Cruz
rationale of the workshop
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
• Do uncertainties in atomic data matter? "
rationale of the workshop
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
HH204 (courtesy of M. Núñez-Díaz)
rationale of the workshop
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
• 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?"
participants
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
ASSESSORS""
Ferland (Cloudy), Del Zanna (CHIANTI),
Shaw (nebular)... "
USERS""
Stellar + nebular: Wesson, Bergemann, .."
PRODUCERS""
Aggarwal, Bautista, Mendoza..."
rationale of the workshop
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
• 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?"
rationale of the workshop
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
• 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?"
[Ne V] (Mendoza)
rationale of the workshop
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
• 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?"
advice to producers
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
• 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"
advice to users
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
• 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"
""
"
• 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"
""
"
advice to users
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
Ramsbottom et al 1996
Tayal & Zatsarinny 2010
advice to users
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
• 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"
""
"
communication
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
communication
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011
astroatom.wordpress.com
thank you!
Planetary An eye
Nebulae to the future IAU 283 - Puerto de la Cruz, 25-29 July, 2011