Astronomy and Space Science

Biography

Biography: Artur Martirosyan

Abstract

In this paper, we propose a novel approach for direct detection of changes in location and form distribution of astronomical objects by means of special apodizing filter. The optical transmittance of the filter should be changed by specific quadratic law along the radial direction. The astronomical objects’ parameters are derived by (relative flux powers) → (spatial parameters) transformation. In contrast to image processing, the objects’ characteristics are
calculated (not processed) with simple formulas by using data from non-matrix detectors. It has been proven that, after passing through the filter, the radiant flux of the astronomical object’s image is minimal , if its brightness center coincides with the apodizing filter axis (Fig. 1b). Besides, if transversal displacement d between the brightness center and apodizing filter axis occurs, the power gain of transmitted through the filter rays depends only on the displacement distance and the overall incident power , being independent from the power’s spatial distribution shape of image rays in the cross-sectional plane. These properties of the presented apodizing filter allowed finding displacement and radial standard deviation of the astronomical objects and their spatio-temporal evolution. Dividing these equations, and taking into account, that the relation between σ and radius of the star circle ρ is represented as , the relative uncertainty in detection of star’s brightness center location is estimated as . If the relative error of radiant flux measurements is , we obtain . It is well known that the barycenter of the Sun - Jupiter binary system is located at distance of from the Sun center ( is the Sun radius). Thus, the presented method provides an opportunity to discover exoplanet with the radius of about 37 times smaller than Jupiter’s (i.e. about 3.3 times smaller than Earth’s), if the exoplanet’s star has a mass comparable to the Sun’s.