Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Mon. Not. R. Astron. Soc. 000, 000--000 (0000) Printed 13 December 1996 (MN L a T E X style file v1.3) Radio and EUV observations of CF Tucanae
 

Summary: Mon. Not. R. Astron. Soc. 000, 000--000 (0000) Printed 13 December 1996 (MN L a T E X style file v1.3)
Radio and EUV observations of CF Tucanae
A. G. Gunn 1? , V. Migenes 2y , J. G. Doyle 1 , R. E. Spencer 3 and M. Mathioudakis 4
1 Armagh Observatory, College Hill, Armagh, BT61 9DG, N. Ireland
2 ATNF, P. O. Box 76, Epping, NSW 2121, Australia
3 NRAL, Jodrell Bank, Lower Withington, Cheshire, SK11 9DG, UK
4 Department of Pure & Applied Physics, Queen's University of Belfast, Belfast, BT7 1NN, N. Ireland
Accepted 1996 Received 1996 in original form February 1995
ABSTRACT
We present contemporaneous EUV and radio observations obtained for the totally
eclipsing chromospherically active RS CVn­type binary CF Tucanae. Observations were
made with the ATNF Compact Array at 6 cm and 3.6 cm over one complete orbital
cycle of the system and with the EUVE Deep Survey/Spectrometer telescope over five
orbital cycles. We obtained a strong detection of the source (1.9 mJy at 6 cm and
1.1 mJy at 3.6 cm) in the radio. Both EUV and radio flux levels appear to show a
clear modulation at the orbital period with a maximum at phase 0.5 which indicates
the existence of an intra­binary region of activity. This has important consequences for
the details of coronal formation and field interaction in active close binary stars. We
interpret the EUV emission as an isotropically radiating thermal source; on the other
hand the radio emission shows evidence of intrinsic gyromagnetic directivity. We also

  

Source: Armagh Observatory

 

Collections: Physics