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"Stellar magnetism"

International Conference Proceedings,

1992 ,

181-185 .

A M HE R I N TH E LO W

STAT E (SEPTEMBER , 1990 )

J.M . BONNET-BIDAUD* , N.N .

SOMOV** ,

T.A . SOMOVA* *

* Servic e d'Astrophysique , CEN Saclay, Franc e * * Specia l Astrophysica l Observator y o f the Russia n A S Nizhni j Arkhy z 357147 , Russi a

ABSTRACT . vations

The paper reports the results of spectral and photometrical obserof AM Her obtained on September 17 1990. The star was investi-

gated using the scans obtained with the TV-scanner of the 6 m telescope within the range 3600-5100 AA the with a spectral resolution of ~4 A. installed in UBVR

photometry was obtained with condary focus (NI). Parallel

Nasmyth photometer

the se-

spectral observations of the system were carThat night AM Her was observed in the Using dwarf the absorption its filter spectrum magnetic

ried out with the TV-scanner. v=15 .013 of
m

± 0 .021, i.e. hydrogen estimated.

m

at

the low state. in the

Zeeman

splitting

white

atmosphere

field was

181