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Article
Editorial to the special issue Synergies Between Solar and Stellar Modelling
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Article
CoRoT 102931335: a candidate γ Dor in an eclipsing binary
We present an on-going study of CoRoT 102931335. Our preliminary results indicate that the target is an eclipsing binary system with an orbital period of
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Article
The SUGAR experiment, technical description and performances
An experiment to verify the performances of BGO/CsI phoswich detectors, in the domain of gamma-ray astronomy, was converted into a small-size experiment to detect X-gamma emission from the SN1987A. We shortly ...
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Article
The LAPEX experiment for observation of the supernova SN 1987A in hard X-rays
The LAPEX payload is described in the configuration that will be launched to observe the supernova SN 1987A. The balloon flight will be performed from Alice Springs (Australia) in April 1989 as a part of a NAS...
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Article
Large-area phoswich balloon experiment for hard-X-ray astronomy
We describe a balloon experiment, currently in the marking, devoted to the observation of celestial X-ray sources. The main features of the X-ray telescope are summarized as follows. It operates in the energy ...
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Article
Second-order scattering approximation to X-ray photon transport at balloon altitudes
A numerical solution of the transport equation, based on the iterative method of expansion in order of scattering, is proposed to evaluate the effect of multiple Compton scattering on the cosmic X-ray spectrum...
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Article
Chemical and physical properties of nearby population I stars
An analysis of some photometric and kinematic data for nearby Population I stars has been carried out. The main results show that a good correlation exists between the dynamic state and age; but a non-negligib...
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Article
Transient short time periodicities in the optical enission from Cyg X-1
TEMPORAL structure down to the millisecond time scale has been observed in the X-ray emission of Cyg X-1 (ref. 1). This has been interpreted as evidence of instabilities in the accretion disk surrounding a bla...