A spectral energy distribution (SED) is a plot of energy versus frequency or wavelength of light (not to be confused with a 'spectrum' of flux density vs frequency or wavelength).[1] It is used in many branches of astronomy to characterize astronomical sources. For example, in radio astronomy they are used to show the emission from synchrotron radiation, free-free emission and other emission mechanisms. In infrared astronomy, SEDs can be used to classify young stellar objects.
The SED of M51 (upper right) obtained by combining data at many different wavelengths, e.g. UV, visible, and infrared (left)
The count rates observed from a given astronomical radiation source have no simple relationship to the flux from that source, such as might be incident at the top of the Earth's atmosphere.[2] This lack of a simple relationship is due in no small part to the complex properties of radiation detectors.[2]
^"SED plots - CoolWiki". coolwiki.ipac.caltech.edu. Retrieved 27 February 2018.
^ abcdDolan JF (Aug 1972). "The Direct Reduction of Astronomical X-Ray Spectra". Astrophys. Space Sci. 17 (2): 472–81. Bibcode:1972Ap&SS..17..472D. doi:10.1007/BF00642917. S2CID 123125127.
Further reading
Eberhard Haug & Werner Nakel (2004). The elementary process of Bremsstrahlung. River Edge NJ: World Scientific. p. Scientific lecture notes in physics, vol. 73. ISBN978-981-238-578-9.
Jakob Walcher; Brent Groves; Tamás Budavári; Daniel Dale. . Archived from the original on 2014-08-14.
External links
The Science of Spectroscopy
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spectral, energy, distribution, other, uses, disambiguation, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, n. For other uses see Sed disambiguation This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Spectral energy distribution news newspapers books scholar JSTOR December 2009 Learn how and when to remove this template message A spectral energy distribution SED is a plot of energy versus frequency or wavelength of light not to be confused with a spectrum of flux density vs frequency or wavelength 1 It is used in many branches of astronomy to characterize astronomical sources For example in radio astronomy they are used to show the emission from synchrotron radiation free free emission and other emission mechanisms In infrared astronomy SEDs can be used to classify young stellar objects The SED of M51 upper right obtained by combining data at many different wavelengths e g UV visible and infrared left Contents 1 Detector for spectral energy distribution 2 See also 3 References 4 Further reading 5 External linksDetector for spectral energy distribution EditThe count rates observed from a given astronomical radiation source have no simple relationship to the flux from that source such as might be incident at the top of the Earth s atmosphere 2 This lack of a simple relationship is due in no small part to the complex properties of radiation detectors 2 These detector properties can be divided into those that merely attenuate the beam including residual atmosphere between source and detector absorption in the detector window when present quantum efficiency of the detecting medium 2 those that redistribute the beam in detected energy such as fluorescent photon escape phenomena inherent energy resolution of the detector 2 See also EditAstronomical radio source Astronomical X ray sources Background radiation Bremsstrahlung Cosmic microwave background spectral distortions Cyclotron radiation Electromagnetic radiation Synchrotron radiation Wavelength dispersive X ray spectroscopyReferences Edit SED plots CoolWiki coolwiki ipac caltech edu Retrieved 27 February 2018 a b c d Dolan JF Aug 1972 The Direct Reduction of Astronomical X Ray Spectra Astrophys Space Sci 17 2 472 81 Bibcode 1972Ap amp SS 17 472D doi 10 1007 BF00642917 S2CID 123125127 Further reading EditEberhard Haug amp Werner Nakel 2004 The elementary process of Bremsstrahlung River Edge NJ World Scientific p Scientific lecture notes in physics vol 73 ISBN 978 981 238 578 9 Jakob Walcher Brent Groves Tamas Budavari Daniel Dale Fitting the spectral energy distributions of galaxies Archived from the original on 2014 08 14 External links EditThe High Energy Astrophysics Science Archive Research Center HEASARC at NASA The Science of Spectroscopy This astronomy related article is a stub You can help Wikipedia by expanding it vte This scattering related article is a stub You can help Wikipedia by expanding it vte This spectroscopy related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Spectral energy distribution amp oldid 1120169194, wikipedia, wiki, book, books, library,
