Energy equilibrium in coronal magnetic loops -reinvestigated     

Suresh Chandra  Lalan Prasad 《Astrophysics and Space Science》1994,222(1-2):9-38

Temperature distribution in cylindrically symmetric coronal magnetic loops has been reinvestigated under various conditions: (a) loop with the pressure varying along the radial distance, and (b) loop with constant pressure, for cooler apex loops and hotter apex loops. This work is reinvestigation of our previous work published inAstrophysics and Space Science (Chandra and Prasad, 1993b).  相似文献   

Effect of biochar on desiccation of marine soils under constant and cyclic temperatures     

Puspanathan  Thellen Kumar  Jayawardane  Vihan Shenal  Paul  Suvash Chandra  Ying  Kong Sih  Shukla  Sanjay Kumar  Anggraini  Vivi 《Acta Geotechnica》2022,17(12):5441-5464

Acta Geotechnica - Biochar has recently been gaining increasing attention as a stable and sustainable soil amendment material. However, the effect of biochar amendment on the desiccation behaviour...  相似文献   

3D SEM Approach to Evaluate the Stability of Large-Scale Landslides in Nepal Himalaya   总被引：3，自引：0，他引：3  

Ram Chandra Tiwari  Netra Prakash Bhandary  Ryuichi Yatabe 《Geotechnical and Geological Engineering》2015,33(4):773-793

  相似文献   

Precambrian crustal growth and tectonics: introduction     

Vinod K. Singh  Ram Chandra  Asish R. Basu  Surendra P. Verma  Tapas K. Biswal 《International Geology Review》2015,57(11-12):v-viii

  相似文献   

Lunar daily distance numbersD andD′     

Jagdish Chandra Gupta 《Earth, Moon, and Planets》1975,14(2):247-253

In analyses of the effect of variation of the Earth-Moon distance on geophysical phenomena, it is customary to arrange the geophysical data according to the dates of apogee and perigee. However, lunar distances at apogee and especially at perigee vary within wide limits from month to month. A new daily indexD' of lunar distance is defined to permit a more precise determination of effects related to lunar distance. It is readily calculated by a computer program.  相似文献   

Radiative recombination in some ions of astrophysical interest     

Udit Narain  H. P. Mital  Suresh Chandra 《Solar physics》1977,52(2):417-422

Radiative recombination coefficients for some quadruply and quintuply ionized atoms, present in the Sun and its atmosphere, are investigated in the temperature range 10–10⁴ K by using the method of detailed balance. Simple expressions are given for a quick estimation.  相似文献   

Temperature in transition region and inner corona     

Suresh Chandra 《Astrophysics and Space Science》1983,96(2):455-456

The investigation of Alamet al. (1979), of the temperature distribution in spherically-symmetric transition region and inner corona, appears to be in error.  相似文献   

The effects of saturant salinity and pressure on the electrical resistivity of Hawaiian basalts     

Chandra S. Rai  Murli H. Manghnani 《Geophysical Journal International》1981,65(2):395-405

  相似文献   

Study of Distribution and Asymmetry of Solar Active Prominences during Solar Cycle 23     

Navin Chandra Joshi  Neeraj Singh Bankoti  Seema Pande  Bimal Pande  Kavita Pandey 《Solar physics》2009,260(2):451-463

In this article we present the results of a study of the spatial distribution and asymmetry of solar active prominences (SAP) for the period 1996 through 2007 (solar cycle 23). For more meaningful statistical analysis we analyzed the distribution and asymmetry of SAP in two subdivisions viz. Group1 (ADF, APR, DSF, CRN, CAP) and Group2 (AFS, ASR, BSD, BSL, DSD, SPY, LPS). The North – South (N – S) latitudinal distribution shows that the SAP events are most prolific in the 21° to 30° slice in the Northern and Southern Hemispheres; the East – West (E – W) longitudinal distribution study shows that the SAP events are most prolific (best observable) in the 81° to 90° slice in the Eastern and Western Hemispheres. It was found that the SAP activity during this cycle is low compared to previous solar cycles. The present study indicates that during the rising phase of the cycle the number of SAP events are roughly equal in the Northern and Southern Hemispheres. However, activity in the Southern Hemisphere has been dominant since 1999. Our statistical study shows that the N – S asymmetry is more significant then the E – W asymmetry.  相似文献   

3D Evolution of a Filament Disappearance Event Observed by STEREO     

S. Gosain  B. Schmieder  P. Venkatakrishnan  R. Chandra  G. Artzner 《Solar physics》2009,259(1-2):13-30

A filament disappearance event was observed on 22 May 2008 during our recent campaign JOP 178. The filament, situated in the Southern Hemisphere, showed sinistral chirality consistent with the hemispheric rule. The event was well observed by several observatories, in particular by THEMIS. One day, before the disappearance, Hα observations showed up- and down-flows in adjacent locations along the filament, which suggest plasma motions along twisted flux rope. THEMIS and GONG observations show shearing photospheric motions leading to magnetic flux canceling around barbs. STEREO A, B spacecraft with separation angle 52.4°, showed quite different views of this untwisting flux rope in He ii 304 Å images. Here, we reconstruct the three-dimensional geometry of the filament during its eruption phase using STEREO EUV He ii 304 Å images and find that the filament was highly inclined to the solar normal. The He ii 304 Å movies show individual threads, which oscillate and rise to an altitude of about 120 Mm with apparent velocities of about 100 km?s^?1 during the rapid evolution phase. Finally, as the flux rope expands into the corona, the filament disappears by becoming optically thin to undetectable levels. No CME was detected by STEREO, only a faint CME was recorded by LASCO at the beginning of the disappearance phase at 02:00 UT, which could be due to partial filament eruption. Further, STEREO Fe xii 195 Å images showed bright loops beneath the filament prior to the disappearance phase, suggesting magnetic reconnection below the flux rope.  相似文献