SCIENTIFIC ABSTRACT ZHEVAKIN, S.A. - ZHEVANDROV, N.D.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R002064720013-6
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: March 20, 2001
• Sequence Number: 13
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

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AUTHOR% Zhevakin$ S.A. SOV/33-36-2-9/27
TITLEs The Evaluation of Non-Adiabatic Stellar Pulsations by Use of
a Discrete Model
PERIODICALs Astronomichos~iy zhurnaltl959,Vol 36,Nr 2,pp 269-202 (USSR)
ABSTRACTs The author develops a method for the calculation of radial
non-adiabatio stellar pulsation with the aid of a discrete
model of aetellar envelope, It is pointed out that this method
requLres much less calculation expenditure than the methods pro;
posed by WoltJor Z_Ref 13 ' '4 7 and Rosseland Z_Ref 17 7 .'Th
author formulates the conditians under which the new meTiod is
applicable. He constructs a discrete multilayer spherical model
of a pulsating stellar envelope and Investiaates the equations
of motion of this model. - There.are I figureI and 40 referencess
23 of which are Soviet, 9 English, 4 Germang 3 Dutch, I Indian.
ASSOCIATIONt Radiofizicheskiy institut -Gorlkovskogo,'goa. uhiveralteta imeni N.T.
Lobachevskogo (Radiophynical Institute at the Gorlkiy State U~ii-
veraily imeni N*I*.Lobachevskiy)
SUBMITTEDs February 100958
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30):
AUTHORs Zhevakin,S.A.- BOT/33-36-3-2/29
TITLEi 'On the Theory of Stellar Pulsations V (Spherical Discrete Model
of Several Layers)
PERIODICA LilAstronomicheakiy zhurnal,1959,Vol 369Nr 3,PP 394-409 (USSR)
ABSTRACTs The present paper is a continuation of fRef 12t3,2,2e-7 and
oontaine.a theory of stellar pulsations. The author uses a
spherical disarete model of several layers, where the change of
the temperature gradient is considered for the appearing
oscillations. Thereb an essential improvement of the qualitative
results ofcRef 27is obtained. The consideration of the long.-
periodic variable of the type RR Herculis and A Canis Majorio is
new. The behavior of these stars corresponds well to the theory
of the author, The moot essential reaults aret If the envelope
contains,oa. 15 % helium and If there appears a radiative energy
transfer In the zone of critical He II ionization, then in the
envelope there appears a negative dissipation, sufficient for
maintaining the oscillations of the star. The influence of the
.parameters of the stellar envelope on -the amplitude and phase of
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On.the Theory of Stellar Pulsations V (Spherical 807/33-36-3-2/29
Discrete Model.of Several Layers)
oscillations of the radiative flow from the star is investigated.
The data of the parameter values corresponding to the single
types of pulsation are improved.
There are 6 tables, 3 fig-area, and 32 references, 14 of whi ch are
Soviet, 4 Germanp 2 Dutch, 1 Canadian, 3 English, and 8 Americano
-'ASSOCIATION i Radio f i zi che skiy institut pri Gortkovskogo go~udarst*ennogo ui�YmsL-
teta bnA N.I.Lobachevokogo (Hadlophysical Institute at the Gorlkiy State
University imeni n.r.Lobachevskiy)
SUBMITTEDi May 19, 1958
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ZHZVAKIN, S.A.
~Phase and,amplituds -variations of oocillations of the radiation
flux passing through a nonadiabatic envelope of a pulsating star.
Astron.shur. 37. no.3,-443-45? W-Je '60. (MIRA 13:0)
1. Radiofisicheskiy institut Gorlkovskogo gonudaretvannogo
universitets, imeni 11.1. Lobachevskogo.
(Stars,Iaria'ble)
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9/053/60/037/005/007/o24
E032/E514
.AUTHOR: Zhevakin, S. A.
TITLE1 on a Comm6n.Error in'the Theory of stellar Variability
PERIODICALs Astronomicheakiy zhurnal, 1960, V01,371 NO-5*
842-847
'In a number of papers attempting to explain the
TEXT:
existence of the phase difference between light variations and
radius variations in pulsating stars, use is made of the analogy
between this phase.shift and,the,phase lag which occurs during the
propagation of thermal waves through a non-pulsating medium. This
analogy was first noted by Eddington and was later developed by
Rosseland. , ~The present author claims that he showed in Ref.4
that this analogy in quite false. However, in recent years the
analogy was employed by Cox and Whitney (Ref.5) and Cox (Ref.6)
who derived various formulae from it and applied them to the
theory of non-adiabatic pulsations of stars and used them in the
."semi-empirical" derivation of the period-luminosity relation for
classical Cepheids and Cepheids in globular clustera. The
incorrect Rosseland-Cox-Whitney formula (Eq*1 of Ref-5) was also
used by Wallerstein (Ref-7) in his calculation of the phase shift
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E032/E5i4
On a Common Error in the Theory of Stellar Variability
for the various models of the variables M5 No.42 and W Virginis.
The,present paper develops the criticism given in Ref.4 in greater
detail. It is shown that Rosselandfs formula for the phase shift
for various stars, which is based on -the above analogy, can lead,
depending on -the adopted stellar model, io a value of the phase,
.shift,which differs quite considerably from the true value. This
is due -to the fact that the term pd/dt (1/e), which was neglected
by Rosseland, is in faet of the name order of magnitude as the
term'(div We It is also argued that the theory of non-
.adiabatic pulsations developed by Cox (Refs. 20 and 6) and
Cox and Whitney (Ref.5),* although based on the correct idea, i.e.
theassumption that the peripheral zone of critical ionization in
responsible for the pulsations, contains fundamental errors and
the majority of statements contained in these papers are
incorrect. They will be'discussed in greater detail in a future
publication. Reference is made to numerous publications by the
present author in which a correct treatutent of this problem is
,said to be given. There are 28 referenceni 20 Soviet and
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S/033/60/037/005/007/024
E032/E511k
'On a Common Error in the Theory of Stellar Variability
8 English.
ASSOCIATIONt Radiofizicheskiy institut Gorlkovskogo goo.
universitsta.imeni N. 1. Lobachevskogo
(Radiophysical'Institute of the GorIkiy State
University iment N .I.I. Lobacheveray)
SUBMITTEDt October 1959
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AUTHOR Zhevskin S* At I' Strellcov, G M__
-Metspettral line due-to-collisions
TITLE: n; e 0M of
*'---Zhg' Fizika Abs
RU BMCE Tri Komiso kt 19(* 139-4i
po op~ roakdpiie AN BOSH; t, 3?, vypo 10
--TOPIC TAGS: spectral line, light scattering, kinstic,equation) molecular spectrum
ABSTRACT:: It i's shown that an error has crept into the derivation.of the formu3A
_paper-~4rf Van-Vleck and Weiss-
for-the: contour: of-the- spectral- line -in -the -well known
kopf. For an idealized model,of the optical oscillator the c6rrect-torm affhe_-_
spectral line can be obtained by the kinetic-equation method. This method leads to
the same spectral-line shape under three different assumption's concerning the mechan-
ill-M-6f the collision betwienAhe optical oscillator and the*moleculen surrounding it#
This spectral-line shape# unlike.the spectral-line abape given by Van-Vleck and
Weiaskopf, makes it possible to describe satisfactorily the rotational spectrum of
-water vapor* :[Translation of:abstract]
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ACCESSION NR: AP4043666
~AUTHOR: Zhevakint S#.A*9 Naumovo A# P.
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TITLE: Absorption of ce timater and nAllimeter waves by atmospheric water
vapor.,-,
iSOURCE:. Radidtekhnika claktronikao ve 9. not 8, 1164,.1327-1337
-,TOPIC TAGS: radio, radio commiant cation, radio wave, radio wave absorption,
;radio wave atmospheric absorption
-ABSTRACT: The coefficient of absorption of (0, 7 mm - 3Z cm) radio waves by'
atmospheric water vapor is computed on the basis of a kinetic equation developed
by, the authors , earlier (IVUZ. Radlofizikas 1963, 6, 4. 674, and Geomagnetizm. i
1963, 3. 4. 666). The shape, of the water spectral line determined
from that equation to credited with a better agreement than Van-Vleck-
Wetookopf 'a line shape with published oxporimantal data, yet no complete
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AUTHCR - Zhevakin,-5. A.1 Naumv, A. P.
MG: Scient1ftg_,Re8ejLr. t Rod, (Rauchno-J_
issledovatelfifty radiofiticheekly instit pri Gorilkovskom wAveraltate)
TITLEt Some problems in calculating and measuring the absorption of millimeter am
submilli or waves atmospheric water vapor
SOURCEs IVUZ. Radiolzika,, v. 8, no. 6, 1965, ilOO-1109
TOPIC TAGS: millimeter wave, submillimeter wave, radio wave absorption
ABSTRACTs Theoretical values of the absorption factor -Y for a rmge of 10 0 -52 as
were reported in recent of the autboWwarks (e.g. , Rad. I alektronW, no. 9, p - 1 ~27,
1964)1 measured values of JV were 1.5--2 times higher than the theoretical for the
2-8-= band and for the submillizeter ( A , 60 u ) band. Tho presont artlcIe
exaaines the temperature of solar radiatloo attenuated by the Marttv- -( IT- f: I t - - , - ' ~, e
absorption factor of atmospheric water vapor, and the tenp"rat,~.ire of atmnsphor',c
-4radiation. It is preferable to measure thp abp,~r-ptirn Ui the -ibmi.111--if-ar !-a:igv t,y
igolar radla'Cfon'id~ than by -Atroopheri, r441q,- :zi, iet;p)t" ''o it , -.it
solar-radiation nethod is appLicable only when Oe antenna soLir twT:-raturp i-q
rather high and substantially varles with the zenith distance. Poni-.hle eauli,-I, Cf tho
above discrepancy are briefly discussed in the light of currt-n t ~ 19+ -t 11- wivt f. n,
publications. Orig, art. hast 5 figures and 2 formulaa.
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SUB GODHI 170 SUN UTM 144q65 / MM RM 017 / OM M 015 ATD PRITZ.-
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ACCESSION KRz AP5015"0 UR/0109/65/010/006/0987/09%
621.371.1645
AUTHORs Zhevakin, S. Ail Naumov, A. P4, Z",
-abiorption- of centimeter and millizie-ter--
waves by the atmospheria 9~D~6n
SOURCE: Radiotekhnika i elektranikao v. 10, no. 6, 1965, 987-996
TOPIC TAGSt wave absorption by oxygen, centimeter vnive, mi.111mkirter wave
ABSTRACT! A rev-l~w is presented of the published works on the coeff iclent of
absorption of microwaves by oxygan. The coofficient of abf.orption i~ ;:alcu-
1,ited for a 2.2 mrn-10 cm band with a ine form obt4kned oy ,oivii,~ a ;.Itnet',c
Fli 3 t i fjr. .7hp cliscrepancy betwoer, -, At)