by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English
|Other titles||X-ray search for PMS stars in traslucent molecular clouds.|
|Statement||principal investigator, Jean-Pierre Caillault.|
|Series||NASA contractor report -- NASA CR-196151.|
|Contributions||United States. National Aeronautics and Space Administration.|
|The Physical Object|
Abstract. We present a systematic study of the X-ray emission of pre-main-sequence stars in the Taurus-Auriga complex; the sample consists of all catalogued stars in this region observed with the Einstein Observatory, resulting in a total of 69 of served stars, 53 of which identified with X-ray sources. We present the X-ray luminosity functions, based on detections and upper limits, for the. Abstract: We report the results of a new survey of massive, OB stars throughout the Carina Nebula using the X-ray point source catalog provided by the Chandra Carina Complex Project (CCCP) in conjunction with infrared (IR) photometry from the Two Micron All-Sky Survey and the Spitzer Space Telescope Vela--Carina survey. Mid-IR photometry is relatively unaffected by extinction, hence it. X-ray observation of the highly active star forming region NGC In total we could detect 20 X-ray sources, 16 of which we assume to be members to the cluster of pre main sequence stars. Since most of the stars in NGC are still deeply embedded in the molecular cloud (AV. Early history of X-ray spectroscopy in the U.S. Philips Gloeilampen Fabrieken, headquartered in Eindhoven in the Netherlands, got its start as a manufacturer of light bulbs, but quickly evolved until it is now one of the leading manufacturers of electrical apparatus, electronics, and related products including X-ray equipment.
(abridged) Non-degenerate stars of essentially all spectral classes are soft X-ray sources. Low-mass stars on the cooler part of the main sequence and their pre-main sequence predecessors define the dominant stellar population in the galaxy by number. Their X-ray spectra are reminiscent, in the broadest sense, of X-ray spectra from the solar corona. X-ray emission from cool stars is indeed. X-ray spectroscopy was the poor cousin of X-ray photometry (possibly with some low en- ergy resolution) until recently, even though a few notable experiments like crystal spectrom- eters or gratings were carried on early satellites (e.g., Einstein, EXOSAT). In a similar study of site selective SXES, in this case for a type superconductor, also the orbital symmetry of the induced states was studied [11,12] This was accomplished by recording the X-rays at different emission angles with respect to the crystal axis. Only p x,y states contribute to the SXES spectrum recorded along the c axis, whereas both p x,y and p z symmetries contribute. Start studying Intro to Radiology Chapter 1. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. X-ray energy is emitted by: the shell of an atom. discovered they could identify the molecular structure of deoxyribonucleic acid (DNA).
Submitting X-ray Crystallographic Data. As part of the Supporting Information, Authors must provide an electronic copy of the structural data as a Crystallographic Information File (CIF) and must clearly notify the Editor in the cover letter that the manuscript contains structural data.. Authors submitting manuscripts can upload CIFs directly as Supporting Information for Publication. X-ray spectroscopy has emerged as a powerful tool in research and in industrial laboratories. It is used in the study of metals, semiconductors, amorphous solids, liquids and gases. This comprehensive presentation develops the subject from its basic principles and relates the theory to experimental observations. The new edition includes topics that have recently become important, for example. X-ray sources in the ROSAT HRI fields. The composite ISOCAM map of Abergel et al. () (LW2 filter image [ µm], plus LW3 filter image [ µm]) is merged with the background optical. LARGE AREA X-RAY SPECTROSCOPY MISSION The documentation appended here summarizes the work completed on this project during the referenc_l period. NASA Grant NAG Annual Report #1 For the Period 15 September through 14 September Principal Investigator Dr. Harvey Tananbaum September Prepared for.