منابع مشابه
Evidence for collisional depolarization in the MgH lines of the second solar spectrum
Analysis of the Hanle effect in solar molecular lines allows us to obtain empirical information on hidden, mixed-polarity magnetic fields at subresolution scales in the (granular) upflowing regions of the ‘quiet’ solar photosphere. Here we report that collisions seem to be very efficient in depolarizing the rotational levels of MgH lines. This has the interesting consequence that in the upflowi...
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The solar EUV irradiance is a key input for thermospheric and ionospheric models. Difficulties in continuously measuring the calibrated spectrum has prompted the use of various surrogate quantities. Although most proxies correlate quite well with the spectral variability, their use for modelling purposes becomes increasingly unsatisfactory. A different and data-driven approach is considered her...
متن کاملThe Helium spectrum in erupting solar prominences
Even quiescent solar prominences may become active and sometimes erupt. These events are occasionally linked to coronal mass ejections. However we know very little about the plasma properties during the activation and eruption processes. We present new computations of the helium line profiles emitted by an eruptive prominence. The prominence is modelled as a plane-parallel slab standing vertica...
متن کاملSolar and Atmospheric Neutrino Oscillations
I review the status of neutrino masses and mixings in the light of the solar and atmospheric neutrino data in the framework of two–, three– and four neutrino mixing. 1 Indications for Neutrino Mass: Two–Neutrino Analysis I a first review the present experimental status for solar and atmospheric neutrinos and the results of the different analysis in the framework of two–neutrino oscillations. Th...
متن کاملSolar radiation and atmospheric dynamics
This paper studies the problems of mathematical description of physical processes in open non-equilibrium atmosphere. It is proposed that the mathematical description should be based on the idea that properties of an open system are determined by the properties of its elements and external constraints. It is also explained why atmosphere should be represented by an open non-equilibrium system o...
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ژورنال
عنوان ژورنال: Science
سال: 1887
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.ns-9.205.13