WebAug 24, 2006 · As found by other authors, the Lyα line leads to the strongest distortion of the CMB spectrum and appears in the Wien tail of the blackbody spectrum. In our computations, it peaks at wavelength around 170 μm (see Fig. 8 and Table 1) and is very similar in shape and amplitude to the results obtained by Wong et al. (2006). However, … WebFeb 4, 2024 · The thermal Sunyaev-Zel'dovich (tSZ) effect is the distortion generated in the cosmic microwave background (CMB) spectrum by the inverse-Compton scattering of CMB photons off free, energetic electrons, primarily located in the intracluster medium (ICM). Cosmic infrared background (CIB) photons from thermal dust emission in star-forming …
SPECTRAL DISTORTIONS OF THE CMB DIPOLE
WebIn the expanding Universe, the average temperature of the cosmic microwave background (CMB) is expected to depend like on redshift . Adiabatic photon production (or destruction) or deviations from isotropy and homogen… WebMar 14, 2024 · The detection of distortions in the frequency spectrum of the cosmic microwa ve background (CMB) radiation is one of the key tasks of observ ational cosmology [1– burris optics rt 6 riflescope
SPECTRAL DISTORTIONS OF THE CMB DIPOLE - IOPscience
WebThe recombination of hydrogen and helium at z~1000-7000 gives unavoidable distortions to the Cosmic Microwave Background (CMB) spectrum. We present a detailed calculation of the line intensities arising from the Ly-alpha (2p-1s) and two-photon (2s-1s) transitions for the recombination of hydrogen, as well as the corresponding lines from helium. We give … CMB spectral distortions are tiny departures of the average cosmic microwave background (CMB) frequency spectrum from the predictions given by a perfect black body. They can be produced by a number of standard and non-standard processes occurring at the early stages of cosmic history, and … See more The energy spectrum of the CMB is extremely close to that of a perfect blackbody with a temperature of $${\displaystyle 2.7255K}$$. This is expected because in the early Universe matter and … See more The first considerations of spectral distortions to the CMB go back to the early days of CMB cosmology starting with the seminal papers of Yakov B. Zeldovich and Rashid Sunyaev in … See more About 280,000 years after the Big Bang, electrons and protons became bound into electrically neutral atoms as the Universe expanded. In … See more • Bremsstrahlung • Compton scattering • Cosmic Background Explorer • Cosmic Background Imager See more In the cosmological 'thermalization problem', three main eras are distinguished: the thermalization or temperature-era, the $${\displaystyle \mu }$$-era … See more The expected Lambda-CDM (LCDM) distortion signals are small -- The largest distortion, arising from the cumulative flux of all hot gas in the Universe, has an amplitude that is … See more WebMar 1, 2007 · @article{osti_1864188, title = {CMB Spectral Distortions from the Scattering of Temperature Anisotropies}, author = {Stebbins, Albert}, abstractNote = {Thomson scattering of CMBR temperature anisotropies will cause the spectrum of the CMBR to differ from blackbody even when one resolves all anisotropies. A formalism for computing the … burris optics usa