The 1997 Diffuse Interstellar Band Catalog (original) (raw)

Diffuse Interstellar Band spectrum

Diffuse Interstellar Bands are relatively broad absorption bands in the spectra of stars behind interstellar matter. The bands are most likely caused by large molecules, but their identity remains ellusive.

This is an updated catalog of DIBs found in the survey of P. Jenniskens & F.-X. Desert (1994 - Astronomy & Astrophysics Supp. Ser. 106, 39 - 78), an image of which is shown above. Full paper. Below, this catalogue has been completed by new discoveries reported in:


References:



On how to use the catalog


Always compare DIB Catalog data to published astronomical spectra in order to address problems with contamination, line identification, etc.

Common questions:

To obtain DIB spectrum as published in AAS paper:

f(L) = 1 - [Wave/(1.06447*FWHM)] * exp( -(L-Lair)^2/(2*sigma^2) )

Wave = average equivalent width per unit of E(B-V). Note that the Table gives the equivalent width of the DIBs measured in four program stars which are not normalised to reddening E(B-V). The final column Wave is an average of these four values after normalisation to unit W5780, scaled to represent W per unit E(B-V). This average is thought to represent the diffuse interstellar medium

FWHM = Full Width at Half Maximum

sigma = FWHM/2.35482

Lair = peak wavelength (in air)

wavelength in vacuum = 1.000276 (+/- 0.000003?) * wavelength in air

peak wavenumber in vacuum (Nvac) versus peak wavelength in air (Lair): Nvac = 0.9997241/Lair cm-1

Notes: + = certain identification, o = probable, - = uncertain

Value of "-1.00" means: no data available

<* = values differ from those in publication.


The Catalog of Diffuse Interstellar Bands


Legend: "Q" = quality factor. "Lair" = wavelength in air (in Angstrom). Nvac = wavenumber in vacuum, FWHM = full width at half absorption maximum. "30614" refers to data for star HD30614. W is strength of the band in terms of equivalent width. Reference refers to references above.


Q Lair +/- Nvac +/- FWHM(A) +/- W (A) ref: A cm-1 30614 21389 190603 183143 ave +/-


Q Lair +/- Nvac +/- FWHM(A) +/- W (A) ref: A cm-1 30614 21389 190603 183143 ave +/-


Q Lair +/- Nvac +/- FWHM(A) +/- W (A) ref: A cm-1 30614 21389 190603 183143 ave +/-


Q Lair +/- Nvac +/- FWHM(A) +/- W (A) ref: A cm-1 30614 21389 190603 183143 ave +/-

o 6215.7 0.5 16083.8 1.3 1.06 0.55 0.005 0.005 0.002 0.012 0.007 0.003 JD94


Q Lair +/- Nvac +/- FWHM(A) +/- W (A) ref: A cm-1 30614 21389 190603 183143 ave +/-

o 6494.9 0.3 15392.4 0.6 1.39 0.51 0.010 0.021 0.009 0.024 0.023 0.009 JD94 o 6497.5 0.4 15386.2 0.9 0.50 0.09 0.004 0.003 0.004 0.007 0.006 0.001 JD94


Q Lair +/- Nvac +/- FWHM(A) +/- W (A) ref: A cm-1 30614 21389 190603 183143 ave +/-


Q Lair +/- Nvac +/- FWHM(A) +/- W (A) ref: A cm-1 30614 21389 190603 183143 ave +/-


Q Lair +/- Nvac +/- FWHM(A) +/- W (A) ref: A cm-1 30614 21389 190603 183143 ave +/-

o 7935.3 0.2 12598.4 0.2 0.95 0.32 0.006 0.005 0.007 0.014 0.011 0.002 JD94 o 7987.9 0.2 12515.5 0.3 2.90 1.16 -1.000 0.024 0.033 0.069 0.051 0.011 JD94



Last modified: May 4, 2009 P. Jenniskens - email: Petrus.M.Jenniskens [at] nasa.gov