Coherent spectroscopy in astrophysics ... - Jacques Moret-Bailly
direction, a cylinder and are seen like a ring; this ring is discontinuous because of the competition of the modes. As the emissions at the various frequencies of a.Missing:
Coherent spectroscopy in astrophysics: SNR1987A, quasars, galaxies ... Jacques.MoretBailly@ubourgogne.fr Abstract: A lot of astronomical observations seem inexplicable, "anomalous", because, except refraction, the coherent interactions of light with matter are ignored. Understanding optical coherence seems difficult: Although Einstein published a fundamental paper on emission and absorption of light in 1917, most spectroscopists ignored the concept of coherence until Townes' maser worked. The necklace of SNR1987A, the spectroscopy of the quasars, the anomalous acceleration of the far Pioneer probes, the existence of voids in the maps of far galaxies, and so on are easily explained. Introduction: the Strömgren's model. Strömgren studied a system consisting of a large homogenous cloud of hydrogen under low pressure, cold at long distance, containing an extremely hot source as a O or B star. Near the star, at a temperature T higher than 5 .104K, hydrogen is fully ionized into protons and electrons. Further, for T close to 2.104K, it is in an atomic state and at longdistance, for T
Jun 13, 2013 - selection rule for transitions between these hyperfine levels is. AF = 0, Ð1 where .... sample of NH3 pumped with a high power N2O laser.18 In their study they found ..... L. Diehl, C. PflÑgl and F. Capasso, Electron. Lett., 2009,.
signal decomposition in order to accelerate the convergence. ... Refs: Vonesch et al, 2007; Elad et al 2008; Wright et al., 2008; Nesterov, 2008 and Beck-Teboulle, 2009; ... IST can be seen as a generalization of projected gradient descent.
â¢Part 3: Wavelets in Astronomy: from orthogonal wavelets and to the Starlet ... inpainting, blind source separation. ... Planck Component Separation Principle. 10.
-Wavelets are functions defined over a finite interval and having an average value of zero. Haar wavelet .... h(l,k) l,k. â. Ï(x â l,y â k) wj (x,y) =< f (x,y),. 1. 4 j Ï(.
The Curvelet Transform for Image Denoising, IEEE Transaction on Image .... compact objects in the Aquila and Polaris clouds observed by Herschelâ, A&A, 518,.
Sep 28, 2008 - of a gas laser, can be superradiant at several eigen frequencies of atomic hydrogen; the .... the layer of thickness Ç« = cdt, and K a coefficient of diffusion; the total field is: ..... making laboratory experiments easy (Yan et al.
Sep 2, 2003 - tuations and the turbulent shear stress are directly related to the mean ... ematical framework of an improved theory of turbulence. However it is ...
ABSTRACT. Directional filters are a commonly used tool in modern seis- mic data processing to process coherent signals depending on their apparent slowness ...
software, most laboratories possesses instrumentation capable of producing excel- lent data. Fibers ... tary to other characterization techniques and has proven of enormous value to studies in ..... Only recently has calculation of vibrational ......
also the potential of other terrestrial applications for which these ... middle infrared to finely analyze the spectral properties ... high resolution spectroscopy.
Nov 6, 2007 - The equivalent size (in km) of the theoretical resolution element (Î) on Ceres and ..... near-infrared spectra of Ceres: 0.4 µm cutoff, 0.60 µm and.
May 19, 2000 - It is widely believed that form and motion are analysed separately in ... Figure 1c depicts the distribution of velocities obtained by connecting all ...
mic data processing to address coherent signals, depending on their apparent slowness or slope. ... artificial energy sources producing impulsive events. Each .... domain can be written using the transfer function defined in. (2) as: Wyxc (Ï,λ) =.
Together with the magnetic energy, the magnetic helicity is an important quantity used to describe the nature of a magnetic field configuration. In the following ...
This is a new application of ICA to multichannel astrophysical data analysis. Then ... Key words. cosmology: large-scale structure of Universe â cosmology: observations â galaxies: clusters: general â ..... We end up with one map per fre-.
tive region loops (height, inclination, radius, width) applying a dynamical .... The spatial resolution is 5.2 with the same. 340 Ã 300 ... Table 1. Minimal and maximal values of the three magnetic field com- ponents ..... pot m (see Amari et al. 20
netic field, (ii) the shear and twist are then developed by impos- ing a flow field along .... (iii) the distribution of the vertical magnetic field on the photo- sphere (Fig. ... due to the coordinate transformation, we reduce the IVM field- of-view
Tonry et al. 2001), is the first target of the subsample that was observed with OASIS/PUEO. Its steep power-law central luminosity profile (γ = 2.03, Gebhardt et al.
to move synchronously with the moving grating. ... move from the first spot to the second as commonly ..... at a suitable SOA (say 150 to 300 msec), then one.
Jan 6, 2005 - itons, are mixed photonâexciton states that have a number of attractive features .... The polariton energies are now complex numbers. For zero.
pulsed IR excitation and IR probing of samples providing detailed ... nique to study gas-phase samples is still limited. ... In the case of condensed-phase 2D-IR.
Feb 22, 2008 - to the diffusely scattered background is observed. This .... ignoring (dashed curve) and taking into account (full red curve) absorption in the ...
