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Featured researches published by G. Oprescu.


International Astronomical Union Colloquium | 1993

Asteroseismological Models with Rotation

Doru Marian Suran; G. Oprescu

The low frequency NRP oscillations are considered in the case of differential rotation. Partial differential equations for adiabatic oscillations are reduced to a system of ordinary equations by means of a truncated spherical-harmonic expansion. The numerical method for solving the system is described. The final model also includes line profile variations (lpv) and posttheoretical mass (pth) calculations for the complete determinations of the physical, chemical, rotational and seismological properties of the stars.


FIFTY YEARS OF ROMANIAN ASTROPHYSICS | 2007

Fifty Years of Stellar Astrophysics, Extragalactic Astronomy and Cosmology in Bucharest Observatory

Marian Doru Suran; Alexandru Dumitrescu; Nedelia Antonia Popescu; G. Oprescu

This is a short review of some of the main activities of the Bucharest Observatory along the past 50 years: stellar astrophysics, galactic and extragalactic astrophysics and cosmology.


Astronomy and Astrophysics | 1997

THE GO CYGNI SYSTEM : A NEAR CONTACT ECLIPSING BINARY

Helen Rovithis-Livaniou; P. Rovithis; G. Oprescu; Alexandru Dumitrescu; Marian Doru Suran


Astronomy and Astrophysics | 1994

An orbital period study of the contact system AB Andromedae

Anastassios Kalimeris; Helen Rovithis-Livaniou; Peter Rovithis; G. Oprescu; Adrian Dumitrescu; Marian Doru Suran


Archive | 1992

Campaign PHEMU-91: Mutual Events of the Galilean Satellites Observed in Romania

G. Oprescu; Adrian Dumitrescu; Marian Doru Suran; Dorin Chis; V. Turcu; Lucian Burs; Octavian Gherega; Laszlo Farkas; Akos G. Horvath


Archive | 1986

Participation at the campaign of simultaneous observations of X-ray sources, from the Earth and from space.

G. Oprescu; C. P. Cristescu; Alexandru Dumitrescu


Archive | 2005

The Eclipsing Binary AW UMa: Observations at Athens and Bucharest

Peter Rovithis; Alexandru Dumitrescu; Helen Rovithis-Livaniou; G. Oprescu; Marian Doru Suran


Archive | 1998

Observing the VW Cephei Variable

Helen Rovithis-Livaniou; Peter Rovithis; Adrian Dumitrescu; G. Oprescu


Archive | 1997

GO Cygni system (Rovithis-Livaniou+ 1997)

Helen Rovithis-Livaniou; Peter Rovithis; G. Oprescu; Adrian Dumitrescu; Marian Doru Suran


Archive | 1997

On the Possible Variability of the Comparison Star for GO Cygni

G. Oprescu; Peter Rovithis; Adrian Dumitrescu; Helen Rovithis-Livaniou

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Helen Rovithis-Livaniou

National and Kapodistrian University of Athens

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Peter Rovithis

National and Kapodistrian University of Athens

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J. Tremko

Slovak Academy of Sciences

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Paul A. C. Mason

Case Western Reserve University

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