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9141. http://star.arm.ac.uk/~ambn/abstract179.html
We perent radio flux measurements at 5 GHz for a sample of RS CVn-type chromospherically active binary systems made from 1988 to 1992 using the NRAL broad-band interferometer (BBI). The derived radio luminosities are consistent with previous observations but show that radio flaring is a common feature which will affect the results of rotation-activity studies. ... Key words: stars: activity - stars: late type - stars: binaries: close - stars: flare - stars: variables - stars: radio continuum ...
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Ссылки http://star.arm.ac.uk/~ambn/abstract179.html -- 1.7 Кб -- 31.05.1996
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9142. http://star.arm.ac.uk/~ambn/abstract180.html
In two previous papers we investigated in detail the formation of Hydrogen lines in high pressure dMe stellar chromospheres, constraining the possible structures over a two orders of magnitude pressure range. ... We found that when decreasing the transitoin region presure (i.e. the chromospheric temperature gradient), the Balmer lines change rapidly from emission to strong absorption, then the profiles weaken and become narrower until they disappear totally (zero H$_{\alpha}$ stars). ...
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Ссылки http://star.arm.ac.uk/~ambn/abstract180.html -- 4.0 Кб -- 31.05.1996
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9143. http://star.arm.ac.uk/~ambn/abstract165.html
Four low activity dM(e) stars Gl 105B, Gl 643, Gl 813 and Gl 821 were observed spectroscopically in the optical and ultraviolet regions. Despite relatively long integrations, only one of the four had detectable {\it Ca II K\ } emission, Gl 821, which had an observed flux of 9 10$^{-15}$ {\it erg cm}$^{-2}$ {\it s}$^{-1}$, giving a surface flux of only 0.8 10$^{4}$ {\it erg cm}$^{-2}$ {\it s}$^{-1}$. ...
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Ссылки http://star.arm.ac.uk/~ambn/abstract165.html -- 2.5 Кб -- 31.05.1996
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9144. http://star.arm.ac.uk/~ambn/abstract166.html
... No flares were detected during the 3.5 hours of monitoring. ... The resultant spectrum was of sufficient quality to allow the detection of emission lines with an integrated flux of 10$^{-15}$ erg cm$^{-2}$ s$^{-1}$ or greater. Lines of C I, O I, O V, Cl I and Fe XXXI were detected. ... From the upper limit on the observed line width, we derive an upper limit of 38 km s$^{-1}$ for the turbulent velocity in the 10$^{7}$ K plasma. ...
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Ссылки http://star.arm.ac.uk/~ambn/abstract166.html -- 3.0 Кб -- 31.05.1996
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9145. http://star.arm.ac.uk/~ambn/abstract167.html
Investigations of dMe stars at Armagh have revealed a new wave phenomenon in photometric data outside stellar flares which we have attributed to coronal loop resonances. ... In an interpretation of this phenomenon, we examine what we believe might be the key related theoretical questions: What source controls the heating of quiescent coronae in active cool stars, and what is the role played by convection? ...
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Ссылки http://star.arm.ac.uk/~ambn/abstract167.html -- 2.7 Кб -- 31.05.1996
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9146. http://star.arm.ac.uk/~ambn/abstract168.html
A brief description is given of: (1) a newsletter which has been established to notify interested observers of future collaborative programmes, (2) MUSICOS, a group which organizes multisite, continuous spectroscopy, and (3) a computer program which has been written to assist in the coordination of simultaneous observations from ground-based and satellite telescopes.
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Ссылки http://star.arm.ac.uk/~ambn/abstract168.html -- 1.4 Кб -- 31.05.1996
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9147. http://star.arm.ac.uk/~ambn/abstract169.html
We present and disucss observations of a flare event on the dM4.5e star AT Mic (Gl 799AB). These data show evidence of an energetic flare with a radiated energy of 3 10$^{31}$ erg in the range 3600-4200$\AA$. ... Simple models were applied to derive order of magnitude estimates for the mass and kinetic energy budget of the flare for assumed electron density, ionization fraction and temperature values. ... Key words: stars: flares - stars: UV ceti-type - stars: magetic activity ...
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Ссылки http://star.arm.ac.uk/~ambn/abstract169.html -- 2.0 Кб -- 31.05.1996
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9148. http://star.arm.ac.uk/~ambn/abstract171.html
The formation of the Si II resonance multiplets near 1814, 1530, 1306 and 1262 $\AA$ in the Sun is investigated by means of non-LTE radiative transfer computations. ... The lines of the multiplet near 1814 $\AA$ are found to be effectively thin, but ther depth of formatiom embraces regions of widely differing gas pressures, essentially invalidating the {\it coronal} approximation. ... Key words: Sun: Chromosphere - Sun: transition region - Sun: UV radiation - Line: formation ...
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Ссылки http://star.arm.ac.uk/~ambn/abstract171.html -- 2.4 Кб -- 31.05.1996
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9149. http://star.arm.ac.uk/~ambn/abstract172.html
It has been shown by Friss-Christensen and Lassen (1991) that there is a close correspondence in the behaviour of the mean northern hemisphere air temperature and the length of the sunspot cycle, over the period 1861-1990. ... In this paper we extend the comparison between sunspot cycle length and temperature back to the late 18th century using data accumulated at Armagh Observatory since 1795. ...
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Ссылки http://star.arm.ac.uk/~ambn/abstract172.html -- 1.8 Кб -- 31.05.1996
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9150. http://star.arm.ac.uk/~ambn/205.ps
... Gammak \Gamma 1; k + 1] respectively. ... Multipolar magnetic fields in Ap stars X k?1 (\Gamma1) 1+k+q 2ъ ? (2k + 3)!! (k + 1)! ... Multipolar magnetic fields in Ap stars 15 + B (2) 35 \ Gamma 3u 420 i \ Gamma U 2 1 e \Gammai\ Theta + U 2 \ Gamma1 e +i\ Theta \ Delta ? hB 2 + B 2 z i = ъg(u) \ Theta ? B (1) B (1) ` 255 \ Gamma 79u 360 + 105 + 13u 1260 i 3 \ Gamma U 1 0 \ Delta 2 \ Gamma 1 j ' + B (1) B (2) ` \Gamma1392 + 377u 1680 p 2 (U 1 1 U 2 \ Gamma1 +U 1 \ Gamma1 U 2 1 ) + 192 ...
9151. http://star.arm.ac.uk/f77to90/code/functions.mod
MODULE FUNCTIONS,0 FILE 0,tpkf.f PROC FUN,1,8,0: 2,0,0,0,393345,1 RESULTVAR R,4,0,,FUN: 2,0,0,0,129,0 VAR T,3,1,,: 2,0,0,0,267,0 ENDPROC END
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Ссылки http://star.arm.ac.uk/f77to90/code/functions.mod -- 1.1 Кб -- 08.05.1996
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9152. Notables in the transition from Fortran 77 to Fortran 90
... The old source code form, which is based on the punched card, and now called fixed form and the new free form. These two forms may not be mixed independently but must be separated at the compilation; an old program, (one or several program units in the form of a main program, subroutines or functions), which is compiled in free form, has the possibility to give a different result compared with earlier when it was compiled with fixed form, compilation errors are possible. ... Comments. ...
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Ссылки http://star.arm.ac.uk/f77to90/c1.html -- 4.1 Кб -- 17.04.1996
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9153. Explanation of certain terms
adjustable array . The array in a subprogram has a variable dimension just as in Fortran 77 through that both the array name and the dimension (all dimensions) are dummy arguments. ... Array sections can be used here instead of arrays. array function . ... An array in a subprogram which is not local and has a certain data type and a certain rank. ... Each Fortran program has to consist of exactly one main program and and any number of subroutines, functions, modules and BLOCK DATA program units. ...
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Ссылки http://star.arm.ac.uk/f77to90/a9.html -- 15.8 Кб -- 30.03.1996
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9154. Backward and Forward compatibility
Very important in the introduction of a new programming language standard is that old programs (at least those who obey the outgoing standard) can be used once again, with the new standard. When we went from Fortran 66 to Fortran 77 the extended DO -loop was removed (the extended DO -loop means that if you do not change any of the DO -loop parameters you can jump out of the loop and then jump in again (this is somewhat contrary to the concept of structured programming). ... 2, June 1993, page 1. ...
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Ссылки http://star.arm.ac.uk/f77to90/a4.html -- 5.4 Кб -- 30.03.1996
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9155. Use of program libraries
The two main numerical libraries in Fortran 90 are . NAG Numerical Libraries for Fortran 90 Users . IMSL Fortran 90 MP Library Both of these offer both a modified version of the Fortran 77 library, recompiled for Fortran 90, and a completely new library, using all the new facilities of Fortran 90. ... On the Sun using Sun OS 4.2.1 we also got completely wrong results when using library functions in single precision, since the C system on Sun converted all function calls into double precision. ...
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Ссылки http://star.arm.ac.uk/f77to90/c15.html -- 5.2 Кб -- 30.03.1996
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9156. ASA Carriage Control Characters
The first character in each record (line) of formatted output defines a carriage control character to the lineprinter, often called ASA-character, for a previous name of the US Standardization Organization ANSI. ... When using VAX/VMS for output first on a file, which is to be printed later on paper, it is advisable to use the extension .DAT . ... You use the compiler switch -vms f77 -vms prog.f and get the control characters removed from the screen output. ...
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Ссылки http://star.arm.ac.uk/f77to90/asa.html -- 4.5 Кб -- 23.03.1996
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9157. Summary of Fortran 77 statements
... Executable GOTO statements . ... Input/output statements . ... GOTO statement_number_variable, (snr1, snr2, snr3) - an assigned GOTO statement, jumps to the statement number that equals the statement number variable (an arbitrary number of statement numbers snr are permitted). GOTO statement_number_variable - this is an assigned ordinary GOTO statement, it is a combination of the first one, GOTO snr1, and previous one, GOTO statement_number_variable without a list of permitted alternatives. ...
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Ссылки http://star.arm.ac.uk/f77to90/a2.html -- 15.9 Кб -- 23.03.1996
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9158. http://star.arm.ac.uk/f77to90/code/random.f90
IMPLICIT NONE INTEGER, DIMENSION(1) :: OLD, SEED ! THIS PROGRAM ASSUMES K = 1 INTEGER :: I, K REAL, DIMENSION(3) :: HARVEST SEED(1) = 12345 CALL RANDOM_SEED CALL RANDOM_SEED (SIZE=K) WRITE (*,*) ' Number of integers for starting value = ', K CALL RANDOM_SEED ( GET = OLD (1:K)) WRITE (*,*) ' Old starting value = ', OLD CALL RANDOM _NUMBER( HARVEST ) WRITE (*,*) ' Random numbers : ', HARVEST CALL ...
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Ссылки http://star.arm.ac.uk/f77to90/code/random.f90 -- 1.9 Кб -- 18.03.1996
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9159. Tutorial on Fortran 90, Digital UNIX
System parameters on Digital UNIX . ... Digital and Cray use the number of bytes as the KIND -parameter. ... LOGICAL Default byte word KIND number = 4 1 4 LOGICAL Default double quad KIND number = 4 8 16 INTEGER int15 int31 int63 KIND number = 2 4 8 digits = 15 31 63 radix = 2 2 2 range = 4 9 18 huge = 32767 2147483647 9223372036854775807 bit_size = 16 32 64 REAL single double quad KIND number = 4 8 16 digits = 24 53 113 maxexponent = 128 1024 16384 minexponent = -125 -1021 -16381 ...
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Ссылки http://star.arm.ac.uk/f77to90/alpha.html -- 10.4 Кб -- 13.03.1996
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9160. http://star.arm.ac.uk/f77to90/code/epsilon.f90
PROGRAM EPSILON IMPLICIT NONE REAL :: A, B, C, D, E A = 1.0/3.0 B = 4.0*A - 1.0 C = 3.0*B - 1.0 D = 0.5*C E = ABS(D) WRITE(*,*) ' mu = ', E END PROGRAM EPSILON
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Ссылки http://star.arm.ac.uk/f77to90/code/epsilon.f90 -- 1.3 Кб -- 08.03.1996
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