DOES TRANSPARENT HIDDEN MATTER GENERATE OPTICAL SCINTILLATION?
| العنوان: | DOES TRANSPARENT HIDDEN MATTER GENERATE OPTICAL SCINTILLATION? |
|---|---|
| المؤلفون: | Marc Moniez |
| المساهمون: | Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, EDP Sciences, 2003, 412, pp.105-120. ⟨10.1051/0004-6361:20031478⟩ |
| بيانات النشر: | WORLD SCIENTIFIC, 2005. |
| سنة النشر: | 2005 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, ISM: clouds, Galaxy: disk, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Angular diameter, 0103 physical sciences, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, Physics, Scintillation, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Molecular cloud, Astrophysics (astro-ph), Order (ring theory), Astronomy and Astrophysics, ISM: molecules, cosmology: dark matter, Galaxy: halo, Stars, Wavelength, Space and Planetary Science, Halo, Focus (optics), Intensity (heat transfer) |
| الوصف: | Stars twinkle because their light goes through the atmosphere. The same phenomenon is expected when the light of extra-galactic stars goes through a Galactic -- disk or halo -- refractive medium. Because of the large distances involved here, the length and time scales of the optical intensity fluctuations resulting from the wave distortions are accessible to the current technology. In this paper, we discuss the different possible scintillation regimes and we focus on the so-called strong diffractive regime that is likely to produce large intensity contrasts. The critical relationship between the source angular size and the intensity contrast in optical wavelengths is also discussed in detail. We propose to monitor small extra-galactic stars every $\sim 10 \mathrm{s}$ to search for intensity scintillation produced by molecular hydrogen clouds. We discuss means to discriminate such hidden matter signal from the foreground effects on light propagation. Appropriate observation of the scintillation process described here should allow one to detect column density stochastic variations in Galactic molecular clouds of order of $\sim 3\times 10^{-5} \mathrm{g/cm^2}$, that is $10^{19} \mathrm{molecules/cm^2}$ per $\sim 10 000 \mathrm{km}$ transverse distance. 16 pages, 10 eps figures. Accepted for publication in A&A. Minor changes/additions : temporal coherence aspects; scintillation of a quasar in tables 1 (reorganized) and 4; further details on the Local Interstellar Medium |
| تدمد: | 0004-6361 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::903b5d620a5d928b492ce438b634a2e6Test https://doi.org/10.1142/9789812701862_0002Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....903b5d620a5d928b492ce438b634a2e6 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00046361 |
|---|