NASA Ames PAH IR Spectroscopic Database

General

These settings are common to most tools.
Select transitions between and
Convolve transitions with a line profile having a full-width-at-half-maximum (FWHM) of cm^-1
Apply ^* emission model at K
^*The emission models make use of the harmonic approximation.

Co-add

This tool will co-add the spectra in the provided frequency range of the species you selected with selected weights. With the given emission model, the bands are convolved with the chosen emission profile with chosen width. This is then the (weighted) emission spectrum from the selected mixture of PAHs. Due to resource constraints this tool is limited to 256 species.

Choose a weighting scheme:

Up to 5 weights can be set manually.

Stack

This tool will stack the spectra in the provided frequency range of up-to ten species you selected. With the given emission model, the bands are convolved with the chosen emission profile with chosen width. This then allows for the direct comparison of the individual emission spectra of the first ten PAHs selected. Due to resource constraints this tool is limited to 10 species.

Spectral fit

This tool will fit an uploaded astronomical spectrum using the spectra from the selected PAH species. With the given emission model, the bands are convolved with the chosen emission profile and chosen width. When uncertainties are provided they are taken into account. Due to resource constraints this tool is limited to 256 species.
for upload. Valid input formats are: two- or three-column ASCII (wavelength, flux [, uncertainty]), VOTABLE and ISO/Spitzer-YAAR.
Shift the database spectra cm^-1 to the red.
Note, the maximum allowed number of concurrently running spectral fits is 1. Currently running: 0.

Temperature stack

This tool will stack the spectrum in the provided frequency range of one of the species you selected at one-to-five different temperatures. Which species can be chosen below. The bands are convolved with the chosen emission profile with chosen width. This then allows for the direct comparison of the spectrum from one of the PAHs selected at different emission temperatures.
Choose a PAH from your current selection:

Choose up to 5 different blackbody temperatures (in Kelvin)

T₁	T₂	T₃	T₄	T₅

You are kindly asked to consider the following references for citation when using the database:

C.W. Bauschlicher, Jr., A. Ricca, C. Boersma, L.J. Allamandola, "THE NASA AMES PAH IR SPECTROSCOPIC DATABASE: COMPUTATIONAL VERSION 3.00 WITH UPDATED CONTENT AND THE INTRODUCTION OF MULTIPLE SCALING FACTORS", The Astrophysical Journal Supplement Series, 234, 32, 2018 10.3847/1538-4365/aaa019 — BibTeX - RIS
C. Boersma, C.W. Bauschlicher, Jr., A. Ricca, A.L. Mattioda, J. Cami, E. Peeters, F. Sánchez de Armas, G. Puerta Saborido, D.M. Hudgins, and L.J. Allamandola, "THE NASA AMES PAH IR SPECTROSCOPIC DATABASE VERSION 2.00: UPDATED CONTENT, WEBSITE AND ON/OFFLINE TOOLS", The Astrophysical Journal Supplement Series, 211, 8, 2014 10.1088/0067-0049/211/1/8 — BibTeX - RIS
Mattioda, A. L., Hudgins, D. M., Boersma, C., Ricca, A., Peeters, E., Cami, J., Sánchez de Armas, F., Puerta Saborido, G., Bauschlicher, C. W., J., and Allamandola, L. J. "THE NASA AMES PAH IR SPECTROSCOPIC DATABASE: THE LABORATORY SPECTRA", The Astrophysical Journal Supplement Series, 251, 22, 2020 10.3847/1538-4365/abc2c8 — BibTeX - RIS