High-amplitude, long-term X-ray variability in the solar-type star HD 81809: The beginning of an X-ray activity cycle?

Astronomy and Astrophysics

Volumn 418, Issue 1, 2004, Pages

  Favata, F ^a   Micela, G ^b   Baliunas, S L ^c   Schmitt, J H M M ^d   Gudel M ^e   Harnden Jr , F R ^c   Sciortino, S ^b   Stern, R A ^f  

^a EUROPEAN SPACE AGENCY   (Netherlands)

^b INAF OSSERVATORIO ASTROFISICO DI TORINO   (Italy)

^c HARVARD SMITHSONIAN CENTER FOR ASTROPHYSICS   (United States)

^d UNIVERSITY OF HAMBURG   (Germany)

^e PAUL SCHERRER INSTITUTE   (Switzerland)

^f LOCKHEED MARTIN   (United States)

Author keywords

Stars: X rays

Indexed keywords

ABSORPTION; CHARGE COUPLED DEVICES; LIGHT REFLECTION; SAMPLING; SOLAR RADIATION; SPECTRUM ANALYSIS; X RAY ANALYSIS;

CORONAL ACTIVITY; STARS: X-RAYS; X-RAY MODULATION; X-RAY VARIABILITY;

ASTROPHYSICS;

EID: 2342585485     PISSN: 00046361     EISSN: None     Source Type: Journal    
DOI: 10.1051/0004-6361:20040105     Document Type: Article

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