It is clear that the solar corona is being heated and that coronal magnetic fields undergo reconnection all the time. Here we attempt to show that these two facts are related--i.e. coronal reconnection generates heat. This attempt must address the fact that topological change of field lines does not automatically generate heat. We present one case of flux emergence where we have measured the ra...

Recently, a new universal HPLC detection technology has been developed based on charged aerosol detection that has led to the development of a universal HPLC detector, the Corona CAD. To further understand the capabilities of charged aerosol detection and the use of the technology in an HPLC detector, the Corona CAD was tested for its sensitivity, dynamic range, response from compounds of diffe...

Cool stars such as our Sun are surrounded by a million degree hot outer atmosphere, the corona. For more than 60 years, the physical nature of the processes heating the corona to temperatures well in excess of those on the stellar surface have remained puzzling. Recent progress in observational techniques and numerical modeling now opens a new window to approach this problem. We present the fir...

Measurements of the temperature and density structure of the solar corona provide critical constraints on theories of coronal heating. Unfortunately, the complexity of the solar atmosphere, observational uncertainties, and the limitations of current atomic calculations, particularly those for Fe, all conspire to make this task very difficult. A critical assessment of plasma diagnostics in the c...

We extended the disk corona model (Meyer & Meyer-Hofmeister 1994; Meyer, Liu, & MeyerHofmeister 2000a) to the inner region of galactic nuclei by including different temperatures in ions and electrons as well as Compton cooling. We found that the mass evaporation rate and hence the fraction of accretion energy released in the corona depend strongly on the rate of incoming mass flow from outer ed...

The steady-state structure of a disc with a corona is analyzed when the vertical component of the gravitational force due to the self-gravity of the disc is considered. For the energy exchange between the disc and the corona, we assume a fraction f of the dissipated energy inside the accretion disc is transported to the corona via the magnetic tubes. Analytical solutions corresponding to a pres...

Hypercritical accretion flows onto stellar mass black holes (BHs) are commonly considered as a promising model of central engines of gamma-ray bursts (GRBs). In this model a certain fraction of gravitational binding energy of accreting matter is deposited to the energy of relativistic jets via neutrino annihilation and/or magnetic fields. However, some recent studies have indicated that the ene...

We investigate the escape of species from Io's atmosphere using a steady-state model of Io's exospheric corona and its interaction with the Io plasma torus. The corona is assumed to be spherically symmetric with the radial density and compositional structure determined by the gas kinetic temperature, critical level radius, and mixing ratios of the component species. Thermal and nonthermal escap...

امروزه استفاده از محرک­های پلاسمایی جریان متناوب نسبت به جریان مستقیم، جهت کنترل فعال جریان، متداول­تر بوده و تقریبأ هیچ کار تحقیقی بر روی پلاسمای جریان مستقیم انجام نگرفته است. در این مقاله با استفاده از یک منبع تغذیه جریان مستقیم و هندسه های گوناگون، خصوصیات پلاسما در هر دو حالت corona و dbd (dielectric barrier discharge)  مورد مطالعه قرار گرفت. با استفاده از نتایج این پژوهش مشخص شد که جریان ...

Microresonators have been utilized to construct optical interconnection networks. One of the drawbacks of these microresonators is that they suffer from intrinsic crosstalk noise and power loss, resulting in Signal-to-Noise Ratio (SNR) reduc-tion and system performance degradation at the network level. The novel contribution of this paper is to systematically study the worst-case crosstalk nois...