NDLI: Atomic and molecular data for interstellar studies: a status report

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Atomic and molecular data for interstellar studies: a status report

Content Provider	NASA Technical Reports Server (NTRS)
Author	Cardelli, Jason A. Federman, Steven R.
Copyright Year	1996
Description	Most interstellar species have a large fraction of their electronic transitions at far ultraviolet wavelengths. Observations at these wavelengths reveal spectra rich in absorption lines seen against the continuum of a background source, such as a hot star in our Galaxy, a supernova in a nearby galaxy, or even a bright nucleus in an active galaxy. Most of the observations continue to be made with space-borne instruments, but recent work includes measurements of extragalactic material at large redshifts obtained at high resolution with large ground-based telescopes (e.g., the Keck Telescope). The combination of precise experimental oscillator strengths, large-scale computations, and astronomical spectra with high signal-to-noise ratios are yielding a set of self-consistent-values that span a range in strength in excess of 100 for more and more species. The large range is important for studies involving the different environments probed by the various background sources. This review highlights recent work on the atomic species. Si II, S I, and Fe II, and on the molecules, CO and C2.
File Size	495005
Page Count	6
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19980018300
Archival Resource Key	ark:/13960/t6n062w5h
Language	English
Publisher Date	1996-01-01
Access Restriction	Open
Subject Keyword	Astrophysics Red Shift High Resolution Satellite-borne Instruments Supernovae Galaxies Data Acquisition Atoms Electron Transitions Molecules Ultraviolet Radiation Hot Stars Oscillator Strengths Telescopes Line Spectra Interstellar Matter Astronomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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