NIST Atomic Spectroscopy Databases in Support of Astronomy

Details NIST Atomic Spectroscopy Databases in Support of Astronomy NIST Atomic Spectroscopy Databases in Support of Astronomy

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21944301r&link_type=abstract

American Astronomical Society, AAS Meeting #219, #443.01

Astronomy and Astrophysics

Astrophysics

Scientific paper

Joseph Reader1, Alexander Kramida1, Yuri Ralchenko1
1National Institute of Standards and Technology, Gaithersburg, Maryland.
The NIST Atomic Spectroscopy Data Center maintains a number of online databases supporting astronomical observations of atomic spectra. The available numerical and bibliographic databases can be accessed from the NIST Physical Measurement Laboratory website www.nist.gov/pml/data/atomspec.cfm. The largest one, the Atomic Spectra Database (ASD), contains wavelength and energy level data for nearly 180,000 spectral lines including 73,400 oscillator strengths. ASD also includes 92,500 energy levels for various ions of 89 elements. In addition to tabular data, ASD can generate dynamic Grotrian diagrams and Saha/LTE spectra, which can be tailored to the user's needs. We continue to systematically expand this database according to needs of the astrophysics and fusion energy science communities. Our bibliographic databases for atomic spectra are updated about every two weeks; they serve as a valuable resource in searching for the latest data. We also provide online non-LTE codes for plasma modeling. Our compilations of spectral data are largely oriented to the needs of astronomers. Recently completed are extensive compilations for Ar, Cr, Ti, and Ni, and a new compilation for Ca is in progress. Recent updates of line lists and transition probabilities include data for H, He, Li, Be, B, C, N, F, Ne, Na, Mg Al, Cl, Sr, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Sb, Te, I, Cs, and Ba. We welcome suggestions from astronomers regarding spectra to be compiled and added to the online databases. Spectral atlases of Pt/Ne and Th/Ar hollow cathode lamps for wavelength calibration of astronomical spectrometers can also be found at his website.
Our Data Center is supported by NASA (agreement NNH09AL771) and by the Office of Fusion Energy Sciences of the U. S. Department of Energy.

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