Zobrazeno 1 - 10
of 44
pro vyhledávání: '"F. Freistetter"'
Autor:
M. M. Hohle, S. Rätz, N. Tetzlaff, Martin Vaňko, M. Moualla, T. O. B. Schmidt, F. Freistetter, Markus Mugrauer, T. Eisenbeiss, Ralph Neuhäuser
Publikováno v:
Astronomische Nachrichten. 330:511-517
In this work we present detailed photometric results of the trapezium like galactic nearby OB clusters NGC 1502 and NGC 2169 carried out at the University Observatory Jena. We determined absolute $BVRI$ magnitudes of the mostly resolved components us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11212a8e1035709171c094c3a7580af2
https://doi.org/10.1002/asna.200911207
https://doi.org/10.1002/asna.200911207
Autor:
F. Freistetter
Publikováno v:
Celestial Mechanics and Dynamical Astronomy. 104:93-102
Due to close encounters with the inner planets, Near-Earth-Asteroids (NEAs) can have very chaotic orbits. Because of this chaoticity, a statistical treatment of the dynamical properties of NEAs becomes difficult or even impossible. We propose a new w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72360397d7a2bd1b8bf69a12e48bcfc6
https://doi.org/10.1007/s10569-008-9168-z
https://doi.org/10.1007/s10569-008-9168-z
Publikováno v:
Celestial Mechanics and Dynamical Astronomy
Celestial Mechanics and Dynamical Astronomy, 2008, 102, pp.83-95. ⟨10.1007/s10569-008-9159-0⟩
Celestial Mechanics and Dynamical Astronomy, 2008, 102, pp.83-95. ⟨10.1007/s10569-008-9159-0⟩
We present a continuation of our numerical study on planetary systems with similar characteristics to the Solar System. This time we examine the influence of three giant planets on the motion of terrestrial-like planets in the habitable zone (HZ). Us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11e98f8fda96334419b567c9cefb3e5a
https://doi.org/10.1007/s10569-008-9159-0
https://doi.org/10.1007/s10569-008-9159-0
Publikováno v:
The Astrophysical Journal
The Astrophysical Journal, 2008, 681, pp.1639-1645. ⟨10.1086/587501⟩
The Astrophysical Journal, 2008, 681, pp.1639-1645. ⟨10.1086/587501⟩
International audience; We present a numerical study of several two-planet systems based on the motions of Jupiter and Saturn, in which the two giant planets move in low eccentric orbits close to a mean motion resonance. It is more likely to find two
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4c8c6b4f4d068ce1ace525fab0ae932
https://doi.org/10.1086/587501
https://doi.org/10.1086/587501
Publikováno v:
Astronomy & Astrophysics. 466:389-393
Observations have revealed a large variety of structures (global asymmetries, warps, belts, rings) and dynamical phenomena (“falling-evaporating bodies” or FEBs, the “ β Pic dust stream”) in the disk of β Pictoris, most of which may indicat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f858e27689ec579c67df906e6726334
https://doi.org/10.1051/0004-6361:20066746
https://doi.org/10.1051/0004-6361:20066746
Autor:
F. Freistetter
Publikováno v:
Astronomy & Astrophysics. 453:353-361
Context. We have known about the Trojan group of asteroids since 1906. With a suspected number comparable to that of the main-belt, they move around the Lagrangian points L 4 and L 5 of the Sun-Jupiter system. Aims. During the past century the Trojan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6378180028d83f3b2481e1c6e2cd3aae
https://doi.org/10.1051/0004-6361:20054689
https://doi.org/10.1051/0004-6361:20054689
Publikováno v:
International Journal of Bifurcation and Chaos. 15:2865-2882
The standard map x′ = x + y′, y′ = y + (K/2π) sin (2πx), where both x and y are given modulo 1, becomes mostly chaotic for K ≥ 8, but important islands of stability appear in a recurrent way for values of K near K = 2nπ (groups of islands
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30e8181f8414e0f9bc73c05c1187904e
https://doi.org/10.1142/s021812740501371x
https://doi.org/10.1142/s021812740501371x
Publikováno v:
Astronomy & Astrophysics. 426:L37-L40
We investigate the stability regions of hypothetical terrestrial planets around the Lagrangian equilibrium points L4 and L5 in some specific extrasolar planetary systems. The problem of their stability can be treated in the framework of the restricte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7120de29c70fc1d81a7e608dddb62ecf
https://doi.org/10.1051/0004-6361:200400075
https://doi.org/10.1051/0004-6361:200400075
Autor:
T. Laczkowski, Adrián Rodríguez, E. Vieira Neto, G. Hadjivantsides, Ryuji Morishima, J. Pyo, F. Freistetter, O. Peles, Hauke Hussmann, O. Miloni, R. Zechner, S. Kozlowski, A. Khramova, Amaya Moro-Martin, W. von Bloh, C. Romano, J. C. Castro Palacio, B. Pecnik, Marco Thiel, A. Pal, Dimitri Veras, Vinod Patidar, I. Kitiashivilli, Rudolf Dvorak, N. Todorovic, Joachim Stadel, M. Khristoforova, Eeshankur Saikia, E. Zhuchkova, Jozef Vilagi, T. Laakso, V. Paksyutov, I. Csillik, N. Asghari, C. Broeg, L. Carone, D. Lytvinenko, Rigoberto A. Casas-Miranda, Thomas R. Quinn, I. Khromova
Publikováno v:
Astronomy & Astrophysics. 426:353-365
We have undertaken a thorough dynamical investigation of five extrasolar planetary systems using extensive numerical experiments. The systems Gl 777 A, HD 72659, Gl 614, 47 Uma and HD 4208 were examined concerning the question of whether they could h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f187ff4491f51c617afb0162dfb9536
https://doi.org/10.1051/0004-6361:20040390
https://doi.org/10.1051/0004-6361:20040390
Publikováno v:
Celestial Mechanics and Dynamical Astronomy. 90:43-50
Since the first extrasolar planet was discovered about 10 years ago, a major point of dynamical investigations was the determination of stable regions in extrasolar planetary systems where additional planets may exist. Using numerical methods, we inv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6121df3a6f48fad2764c783c37b7bd07
https://doi.org/10.1007/s10569-004-0516-3
https://doi.org/10.1007/s10569-004-0516-3