ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] The broad-line intensity ratios can be understood in terms of optically thick clouds of solar composition photoionized by the UV and X-ray continuum1'3. This requires gas densities N - 1095 cm"3 and an 'ionization parameter' G?? = f??/Nc 1015, where ^uv^lO^cnT2 is the flux of ionizing photons ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/305407a0
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