Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Efstratios Theodossiou"'
Publikováno v:
Journal of Astronomical History and Heritage. 14:180-189
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::988b0dff1f308a372f814677a3dfbe4b
https://doi.org/10.3724/sp.j.1440-2807.2011.03.02
https://doi.org/10.3724/sp.j.1440-2807.2011.03.02
Autor:
P. Mantarakis, Efstratios Theodossiou
Publikováno v:
Astronomical & Astrophysical Transactions. 25:347-354
As a result of the conquests of Alexander the Great, the lunisolar Macedonian calendar became the most widely circulated among all the lunisolar Greek calendars. However, despite its spread, two Roman calendars, generally unknown in the scientific co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::088d7ed4f746e49f8b25c79784959c09
https://doi.org/10.1080/10556790601029591
https://doi.org/10.1080/10556790601029591
Publikováno v:
Astronomical & Astrophysical Transactions. 25:105-118
In the whole of Greece, no eminent astronomers appeared after the great Claudius Ptolemy (second century AD). For ten centuries after Ptolemy we can distinguish only one astronomer: Nicephoros Gregoras (1295–1360). The monk Nicephoros Gregoras is d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b7f036e30905366dbb11ae56a3090a5
https://doi.org/10.1080/10556790600737046
https://doi.org/10.1080/10556790600737046
Autor:
P. Koutsouris, Efstratios Theodossiou, A. Kosionidis, C. Drakopoulos, D. Nikolaidis, Emmanouel Danezis, G. Christou, V. Lyratzi, M. Stathopoulou
Publikováno v:
Astrophysics and Space Science. 284:1119-1142
As it is already known, the spectra of many Oe and Be stars present Discrete Absorption Components (DACs) which, because of their profiles' width as well as the values of the expansion / contraction velocities, they create a complicated profile of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::247a122937667f305688c450966ae459
https://doi.org/10.1023/a:1023668422608
https://doi.org/10.1023/a:1023668422608
Publikováno v:
Astronomical & Astrophysical Transactions. 21:145-147
At the Orthodox Church Council in 1923 in Constantinople a proposal concerning the reform of the calendar, elaborated by the Serbian astronomer Milutin Milankovic´ together with professor Maksim Trpkovic´, was submitted, providing for a more exact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::665b4073ecc153d384ca3550ee80c5f6
https://doi.org/10.1080/10556790215577
https://doi.org/10.1080/10556790215577
Publikováno v:
Astrophysics and Space Science. 187:307-318
A detailed list and analysis of line identifications of five UV spectra of the RS CVn-type binary system TY Pyxidis are presented. These spectra are recorded at different phases with the International Ultraviolet Explorer (IUE). Two of them are in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2eb69f2aa8b6deea72d6fcb356e092f1
https://doi.org/10.1007/bf00643397
https://doi.org/10.1007/bf00643397
Publikováno v:
Astrophysics and Space Science. 183:67-89
A detailed list of line identifications of the far UV spectrum of the O4I(n)f star ζ Puppis (HD 66811) in the wavelength range λλ1168–1984 A recorded on 16 April, 1981 with the International Ultraviolet Explorer (IUE) is presented. The detailed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0c475b14af1485b512bd3cf37ecdf14
https://doi.org/10.1007/bf00643018
https://doi.org/10.1007/bf00643018
Publikováno v:
Astrophysics and Space Science. 179:13-37
A detailed list of line identifications of the far UV spectrum of the O4V((f)) star 9 Sagittarii (HD 164794) in the wavelength range λλ1174-2000 A is presented. The identification is based on two spectra recorded in 1981 (on 16 April—SWP 13729 an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53413d50d48e0568c88a5e88a045d122
https://doi.org/10.1007/bf00642350
https://doi.org/10.1007/bf00642350
Autor:
E. Danezis, Efstratios Theodossiou
Publikováno v:
Astrophysics and Space Science. 183:91-115
Empirical effective temperatures of 211 early-type stars found in a previous investigation (Kontizas and Theodossiou, 1980; Theodossiou, 1985) are combined with the effective temperatures of other 313 early-type stars found from literature. From thes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30158fd2fcf81327de38c02ded88fadc
https://doi.org/10.1007/bf00643019
https://doi.org/10.1007/bf00643019
Publikováno v:
Astrophysics and Space Science. 179:111-139
In this paper we study the main features of the far UV spectrum of the binary star AX Mon, observed with the IUE satellite at phase 0.568. Ions indicating a large range of ionization stages, going fromCi,Oi,Ni toSiv,Civ,Nv are present. The spectrum i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59fe6a453cb74e80e7abd07f2a43fe6d
https://doi.org/10.1007/bf00642357
https://doi.org/10.1007/bf00642357