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Asteroseismology of two Kepler detached eclipsing binaries

By |2022-01-18T12:31:03+02:0009/10/2020|

The present work contains light curve, spectroscopic, and asteroseismic analyses for KIC 04851217 and KIC 10686876. These systems are detached eclipsing binaries hosting a pulsating component of δ Scuti type and have been observed with the unprecedented accuracy of the Kepler space telescope. Using ground-based spectroscopic observations, the spectral types of the primary components of the systems were estimated as A6V and A5V for KIC 04851217 and KIC 10686876, respectively, with an uncertainty of one subclass. The present spectral classification, together with literature radial velocity curves, were used to model the light curves of the systems and, therefore, to calculate the absolute parameters of their ...

Two new nova shells associated with V4362 Sagittarii and DO Aquilae

By |2022-01-18T12:32:55+02:0021/09/2020|

A classical nova is an eruption on the surface of a white dwarf in an accreting binary system. The material ejected from the white dwarf surface generally forms an axisymmetric shell. The shaping mechanisms of nova shells are probes of the processes that take place at energy scales between planetary nebulae and supernova remnants. We report on the discovery of nova shells surrounding the ...

Το τηλεσκόπιο ΑΡΙΣΤΑΡΧΟΣ συμβάλλει στην ανακάλυψη νέων εξωπλανητών

By |2022-01-24T13:35:22+02:0024/04/2020|

ARISTARCHOS telescope contributes to the discovery of new exoplanets In April 2020, a scientific paper (https://arxiv.org/abs/2004.06622) was published in the Astronomical Journal by an international team of researchers led by Benjamin F. Cooke. The work concerns the discovery of two new exoplanets of the type "Hot Jupiter" (Hot Jupiters) around the stars

Η εταιρεία ‘Optical Surfaces’ προμήθευσε το Εθνικό Αστεροσκοπείο Αθηνών με φακούς ακριβείας για το τηλεσκόπιο Αρίσταρχος

By |2022-01-24T13:56:20+02:0009/09/2016|

Η κάμερα ευρέως πεδίου «Αρίσταρχος» Wide-Field Camera (AWFC) είναι μια νέα συσκευή απεικόνισης ευρέος πεδίου που θα χρησιμοποιηθεί στο τηλεσκόπιο «Αρίσταρχος» στο Αστεροσκοπείο Χελμού στην Ελλάδα. Έχει οπτικό πεδίο 26 x 26 λεπτών στον ουρανό με ανάλυση καλύτερη από 1 δευτερόλεπτο ανά pixel.

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