Results 181 to 190 of about 1,577,375 (211)
Some of the next articles are maybe not open access.
Journal of Physical Chemistry A, 2016
The emergence of chemical complexity during star and planet formation is largely guided by the chemistry of unstable molecules that are reaction intermediates in terrestrial chemistry.
L. Zou, B. Hays, S. W. Weaver
semanticscholar +1 more source
The emergence of chemical complexity during star and planet formation is largely guided by the chemistry of unstable molecules that are reaction intermediates in terrestrial chemistry.
L. Zou, B. Hays, S. W. Weaver
semanticscholar +1 more source
Astronomical Spectroscopy Projects
2013Some people feel that it necessary to observe and do spectroscopy on faint stars and stars that have not been observed in detail by others. While this is certainly a worthy goal, it does not work well for small observatories. Because spectroscopy spreads the light out, taking spectroscopic images of faint objects requires very large telescopes to ...
openaire +2 more sources
Advances in detectors for astronomical spectroscopy
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1982Image-reproducing detectors for ultraviolet, optical and near infrared spectroscopic applications in astronomy are described. Emphasis is placed on detectors of the image photon-counting type and on charge-coupled devices.
openaire +2 more sources
Lasers in astronomical spectroscopy-2
Optics Technology, 1970Abstract In Part 1 electronic heterodyne spectroscopy using lasers was introduced. Part 2 discusses two experiments, one with a laser and a gas discharge as a laboratory source, the other with a laser and starlight collected by a telescope with a large receiving area.
openaire +2 more sources
Infrared astronomical spectroscopy with a noncryogenic spectrograph
SPIE Proceedings, 1998Large astronomical spectrographs designed for use in the visible for use in the visible can operate efficiently well beyond the long wavelength cutoff of CCD detectors. Given the expense and complexity of constructing IR-optimized high resolution or multi-object spectrographs, it is prudent to explore the range of scientific programs possible utilizing
Michael R. Meyer+3 more
openaire +2 more sources
EUV Astronomical Spectroscopy With CCD Detectors
SPIE Proceedings, 1986The applicability of CCD detectors to astronomical extreme ultraviolet (EUV) spectroscopy (100-1250 A) is discussed. The advantages of CCDs in this spectral region include internal electron yield, the potential for very high quantum efficiency (about 50-90 percent), and broad wavelength response.
R. A. Stern+3 more
openaire +2 more sources
Astronomical spectroscopy with an echelle-interferometer Cassegrain spectrograph
Applied Optics, 1982A novel Cassegrain spectrograph has been constructed which may be used to produce either echelle spectra or high-spectral resolution Fabry-Perot interferograms. A description of the spectrograph design is given, and results from first observational tests are used to discuss the merits and limitations of the technique for studies in high-resolution ...
Brian Bates+5 more
openaire +3 more sources
, 1999
The design and performance of a dual polarizing bolometer detector system for use with a polarizing Fourier transform spectrometer to conduct broadband astronomical spectroscopy at submillimeter wavelengths is presented.
D. Naylor+3 more
semanticscholar +1 more source
The design and performance of a dual polarizing bolometer detector system for use with a polarizing Fourier transform spectrometer to conduct broadband astronomical spectroscopy at submillimeter wavelengths is presented.
D. Naylor+3 more
semanticscholar +1 more source
Laboratory and Astronomical Rotational Spectroscopy
2018Rotational spectroscopy is a capable technique with a rich history in a variety of chemical physics applications that is undergoing a renaissance thanks to new approaches and powerful new experimental capabilities. This thesis demonstrates that flexibility by examining multiple uses of rotational spectroscopy from instrument development, analytical ...
openaire +2 more sources
Astronomical Fourier-Transform Spectroscopy of the 1990s [PDF]
The number of FT spectrometers mounted behind optical telescopes has decreased with the development of modern cold-grating infrared spectrometers, the instruments of choice for the study of faint astronomical objects. However, Fourier-transform spectroscopy remains unrivalled for high resolution work in the infrared.
openaire +1 more source