The southern RS CVn binary, HD 5303
نویسندگان
چکیده
منابع مشابه
UBV ( RI ) C and uvby photometry of HD 81410 and starspot distribution in RS CVn objects ?
We present UBV RI and uvby photometry of HD 81410 obtained on a total of 40 nights during 1987–90, and an analysis of its long-term photometric behaviour. The star is found to show two well-separated minima in its light curve most of the time; probably there are two preferred effective longitudes about which spots are mainly formed. The migration of the phase of the light minimum usually seen i...
متن کاملMusicos 1998: Optical and X-rays Observations of Flares on the Rs Cvn Binary Hr 1099
We present simultaneous and continuous observations of Hα, Hβ, Na i D1, D2 and He i D3 lines of the chromospherically active binary HR 1099. We have observed HR 1099 for more than 3 weeks almost continuously and monitored two flares. An increase in Hα, Ca ii H & K, Hβ, Hei D3 and Hei λ6678 and a strong filling-in of the Nai D1, D2 and Mgi b triplet during one of the flares are observed. We have...
متن کاملMagnetic Activities in Outer Atmosphere of the RS CVn-type Binary SZ Psc
Abstract. We present the results of time-resolved high-resolution spectroscopic observations of the very active RS CVn-type star SZ Psc, obtained during two consecutive observing nights in 2011 October. Chromospheric activity indicators (including the Hα, Na i D1, D2, He i D3, and Hβ lines) formed at different atmospheric heights were analyzed using the spectral subtraction technique, which sho...
متن کاملMusicos 1998: Observations of Rotational Modulation and Flares on the Rs Cvn Binary Hr1099
We present simultaneous and continuous observations of Hα, Hβ, Na I D 1 , D 2 , He I D 3 and Ca II H & K lines of the chromospherically active binary HR 1099. We have observed HR 1099 for more than 3 weeks almost continuously and monitored two flares. An increase in Hα and Ca II H & K, Hβ and He I D 3 and a strong filling-in of the Na I D 1 , D 2 during the flares are observed. We have found th...
متن کاملA Study of the Coronal Plasma in RS CVn binary systems : HR 1099 and co
XMM-Newton has been performing comprehensive studies of X-ray luminous RS CVn binary systems in its calibration and guaranteed time programs. We present results from ongoing investigations in the context of a systematic study of coronal emission from RS CVns. We concentrate here on coronal abundances and investigate the abundance pattern in RS CVn binaries as a function of activity and average ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1981
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/197.3.769