Results 191 to 200 of about 2,644 (226)
Electronic energy transfer ionization in naphthalene-CO2 clusters reveals excited states of dry ice. [PDF]
Chem SciLemmens AK +3 more
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Absorption Line Spectroscopy of the Interstellar Medium
1983Absorption line studies of the interstellar medium are described. The discussion is in three parts. The first describes current views of diffuse interstellar clouds, while the second reports the results of recent extensive surveys of interstellar regions. The final part is an outline of possible future observations.
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Interstellar H3+Line Absorption toward LkHα 101
Astrophysical Journal, 2004 We present a detection of three lines of the H+3 ion in the near-infrared spectrum of the Herbig Be star LkHalpha 101. H+3 is the principal initiator of gas-phase chemistry in interstellar clouds and can be used to constrain the ionization rate or the ...
Sean D Brittain +2 more
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Investigation into broad interstellar absorption lines
Astronomical & Astrophysical Transactions, 2003Diffuse interstellar bands (DIBs) are investigated mainly with high-resolution spectroscopy, which allows very fine structures to be detected. However, the rapidly increasing resolution of echelle spectra becomes a disadvantage when broad absorption structures are involved.
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Small-scale structure in the interstellar medium: time-varying interstellar absorption towards κ Velorum [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 Ultra-high spectral resolution observations of time-varying interstellar absorption towards κ Vel are reported, using the Ultra-High Resolution Facility on the Anglo-Australian Telescope.
M A Cordiner, S Viti, Viti Serena
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Variable interstellar absorption lines: a brief review
Astrophysics and Space Science, 2003I review the recent discoveries of variable interstellar absorption lines, widely taken to imply the existence of very small scale(10–100 AU) structure in the interstellar medium. Possible origins of this structure are discussed, and attention is drawn to the fact that most known examples seem to be associated with interstellar shells and bubbles of ...
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Interstellar Emission and Absorption Lines
2012Interstellar emission and absorption lines are discussed, including optical recombination lines, the 21cm hydrogen line, and broad lines such as the interstellar Lyman-alpha line. This chapter ends with a discussion of the curve of growth.
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Variable interstellar absorption lines in young stellar aggregates
Monthly Notices of the Royal Astronomical Society, 2018The variability of interstellar atomic lines, sporadically reported in the astronomical literature, has been confirmed both in the case of the nearby hot star delta Ori and the very young and violent star-forming region eta Carinae, using high-resolution echelle spectra. The presented variability concerns the intensities and profiles of Na I, KI and Ca
J Krełowski +4 more
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Interstellar Absorption-Line Observations of the Magellanic Clouds
2008A brief overview of the interstellar absorption-line observations of the Magellanic clouds is given, with particular emphasis on the results obtained by the ESO Key-Program for the Magellanic Clouds. It is shown that high resolution interstellar observations towards bright MCs sources can probe the large scale distribution of the interstellar gas ...
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