AtomicSpectra 1.0 - Copyright 2002 - Mark Kness. A description of how different chemicals can produce very specific emission lines or absorption lines in the spectrum of light from a distant object and how. This is a further clue implying that the absorbing water revealed by Herschel is distributed in a torus along the planet's equatorial plane.ĭifferent colours in the lower panel correspond to spectra taken with Herschel on different dates L is Enceladus' orbital longitude, in degrees, on the three indicated dates, respectively. AtomicSpectra is a Windows program that draws the line spectra of the elements. As shown by the cartoons in the two panels, the rings and satellites are seen almost edge-on in 2009-2010, whereas the configuration was much more oblique at the time of the SWAS observations. The fact that no absorption was detected by SWAS in 1999 is due to the varying geometry of Saturn's system of rings and satellites as viewed from the Earth and its vicinity. In contrast, absorption points at water that is located somewhere in the foreground of the planet, along its line of sight to the observatory, and in a colder environment than that responsible for the emission lines. For example, you can query the 3 dB and 10 dB spectral widths of various optical line modulation formats from the line-side optical module specifications in. At the same frequency, the HIFI spectrometer on board Herschel has recorded a strong absorption feature, as well.Įmission lines are a sign of water in Saturn's upper atmosphere. There is the NIST Atomic Spectra Database where you could browse by elements. The spectrum acquired by SWAS in 1999 only reveals emission by water molecules in Saturn's atmosphere, at a frequency of 557 GHz. The diagram below represents the bright-line spectra of four elements and a bright-line spectrum pro January 2020 NY Regents Chemistry Exam 49 The diagram. The two spectra are substantially different. This graph shows water lines in the spectra of Saturn as detected by NASA's Submillimeter Wave Astronomy Satellite (SWAS) in 1999 (upper panel) and by ESA's Herschel Space Observatory in 20 (lower panel). Hartogh et al., A&A, 532, L2, 2011, reproduced with permission © ESO Emission and absorption lines of water in Herschel and SWAS spectra of Saturnĭepicts: Water lines in Herschel and SWAS spectra of SaturnĬopyright: P.
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