منابع مشابه
Period change and δ Scuti pulsations of eclipsing binary star RZ Cassiopiae
RZ Cas is an Algol-type partial eclipsing binary, the secondary component of which has filled its Roche lobe. Its visual magnitude is 6.18 and its period is 1.195 days. The most important characteristics of RZ Cas are period change (due to mass transfer) and anomalies in the primary minimum of its light curve (due to δ Scuti pulsations). In this paper, light curves of RZ Cas are obtained using ...
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We present an analysis of the lithium abundances in late spectral type binaries of different ages. They belong to several open clusters (Pleiades, Hyades and M67), as well as to Chromospherically Active Binary Systems (CABS). All these binaries have reliable ages, since they are members of wellknown open clusters or, in the case of the CABS, some stellar parameters such masses and radii are acc...
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We show that there are strong links between certain types of asymmetrical Planetary Nebulae (PNe) and symbiotic stars. Symbiotics are binaries and several have extended optical nebulae all of which are asymmetrical and ≥ 40% are bipolar. Bipolar PNe are likely to be formed by binaries and share many properties with symbiotic nebulae (SyNe). Some PNe show point symmetry which is naturally explai...
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Herpes Simplex Virus (HSV) is the most common cause of non-epidemic, acute focal central nervous system infection. HSV type 1 (HSV-1 or Human Herpes Virus-1 [HHV-1]) is commonly associated with oropharyngeal infections, keratoconjunctivitis, and infections of the central nervous system, whereas HSV type 2 (HSV-2 or HHV-2) commonly produces genital infections. Severe disseminated HSV infection m...
متن کاملPulsation, binarity and close frequency spacing in δ Scuti stars: BQ and BW Cancri Results of the STEPHI VI campaign in Praesepe Cluster
New pulsation modes in two δ Scuti stars of Praesepe cluster, BQ and BW Cnc, have been detected during the STEPHI VI campaign in 1995. In particular, 3 frequencies for BQ Cnc and 9 frequencies for BW Cnc have been found above a 99% confidence level. The possibility of the presence of a g-mode present in BQ Cnc is discussed, considering its binarity. The effect of mutual interference between ver...
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ژورنال
عنوان ژورنال: Communications in Asteroseismology
سال: 2007
ISSN: 1021-2043,1021-2043
DOI: 10.1553/cia145s78