SCIENTIFIC ABSTRACT SALOMONOVICH, A.YE. - SALOSHENKO, P.N.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001446910011-4
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: August 25, 2000
• Sequence Number: 11
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

S/033/61/038/002/009/011
1XI, E032/E414
AUTHORS; Kuz'mim, A.D., Salomonovich, A.Ye. and Udalltsov, V.A.@
TITLE,
On the Radio Emission of the Planetary Nebulae
NGC 6853 and-NGC 7293.1
PERIODICAL: Astronamteheskiy zhurnal, 1961, Vol-38, No.2,
373-375.'
p.
p
TEXT: The present.authors,have made an attempt to detect the
..'.radio emission of NGc 6853 and NGC 7293 on 9.6 cm. -The-NGC 6853
nebula was examined at the end of 1958 with the 31 m radio-
telescope of the Krymskaya- stantsiya (Crimean Statlon) of FIAN,
The above radiotelescope has been described by V.V.Vttkevich and
V;A.Udalltsov (Ref.2) and the radiometer has been described by
A.D.Kuzlmin and V.A.Udalltsov (Ref-3). The radiometer had a
'J.'sensitivity of 00.5 at a time constant of 20 see. It is
:-!_estimated that the flux density of radio emission dug to the'
NGC 6853 nebula on 9.*6 cm must be less-than 4 x'10-2bW M-2 cps-1.
The NGC 7293 nebulA was examined-with the 22 m radiotelescope of
FIAN at. the begin@aiiig of 196G. This.radiotelescope has been
described by Aje.@Salomonovich (Ref.4). It is estimated that the
Card @-A
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S/033/61/038/002/009/01
On the Radio Emission E032/F,414.
flux density for,the above two nebulae on 9.6 cm turns out to be at
1@-least by an order of magnitude lower than that reported by
F.D.Drake and H.T.Ewen (Ref.1) on 3.75 cm. Since.the accuracy
t!,,- of the present results is said to be higher by an order of
magnitude than the results reported by Drake and Ewen, it is
i suggested that the latter are incorrect. Using the upper limits
for the flux density, the present authors estimated the-emission
measure ME the electron density n and the mass M of the
above two planetary nebulae. These three quantities are
estimated from the following formulae
As /-P. tv (2)
(P.V -W-P,
M
4.8 10
(PR3 VtpRp-1016
is the angular diameter of the source In frectio a bf-
where @p n
degree and R is the distance in parsecs. These' formulae are
Card.2/4
iA

S/033/61/038/002/009/011
On the Radio Emission E032/E4i4

.1 .7 angular dimensions
2 distance, PC

3 -6
m E, Cm PC
Table

a 6'ji U'A a

isiamepu Fz!6cTofrHii ne n cx- U AIR. cm Inc.

NGC 7293.
2'xt5' 180.16 io