Results 51 to 60 of about 704,493 (229)

Exoplanet orbital eccentricity: Multiplicity relation and the Solar System [PDF]

Proceedings of the National Academy of Sciences, 2014
Significance The Solar System planets have near-circular orbits (i.e., unusually low eccentricity) compared with the known population of exoplanets, planets that orbit stars other than the Sun. This fact has been widely interpreted to indicate that the Solar System is an atypical member of the overall population of planetary systems.
Mary Anne Limbach, Edwin L. Turner
openaire   +3 more sources

Gaia Search for Stellar Companions of TESS Objects of Interest V

Astronomische Nachrichten, EarlyView.
ABSTRACT In this paper, we present the latest results of our ongoing multiplicity survey of (Community) TESS Objects of Interest, using astrometry and photometry from the latest data release of the ESA Gaia mission to detect stellar companions of these stars and to characterize their properties.
Markus Mugrauer, Ann‐Kathrin Kollak, Lara Pietsch, Kai‐Uwe Michel   +3 more
wiley   +1 more source

Statistical Distribution Function of Orbital Spacings in Planetary Systems

The Astronomical Journal
The minimum orbital separation of planets in long-stable planetary systems is often modeled as a step function, parameterized with a single value ${{\rm{\Delta }}}_{\min }$ (measured in mutual Hill radius of the two neighboring planets).
Jeremy Dietrich, Renu Malhotra, Dániel Apai   +2 more
doaj   +1 more source

Spectroscopic Follow-up of Gaia Exoplanet Candidates: Impostor Binary Stars Invade the Gaia DR3 Astrometric Exoplanet Candidates

The Astronomical Journal, 2023
In this paper, we report on the follow-up of six potential exoplanets detected with Gaia astrometry and provide an overview of what is currently known about the nature of the entire Gaia astrometric exoplanet candidate sample, 72 systems in total.
Marcus L. Marcussen, Simon H. Albrecht
doaj   +1 more source

The multiplicity of exoplanet host stars - Spectroscopic confirmation of the companions GJ3021B and HD27442B, one new planet host triple-star system, and global statistics [PDF]

, 2007
We present new results from our ongoing multiplicity study of exoplanet host stars and present a list of 29 confirmed planet host multiple-star systems. Furthermore, we discuss the properties of these stellar systems and compare the properties of exoplanets detected in these systems with those of planets orbiting single stars.
arxiv   +1 more source

Zehn Jahre Gaia‐Messungen: Die hochgenaue Kartierung des Himmels

Physik in unserer Zeit, EarlyView.
Das astrometrische Weltraumobservatorium Gaia der Europäischen Weltraumorganisation hat die astrometrische Forschung revolutioniert, indem es unter anderem präzise Positionen, Bewegungen und Entfernungen von fast zwei Milliarden Himmelsobjekten gemessen hat. Damit stellt es wertvolle Daten für fast alle Gebiete der Astrophysik bereit. Nach dem Ende der
Stefan Jordan
wiley   +1 more source

System study of EPICS: the exoplanets imager for the E-ELT

SPIE Proceedings, 2010
ESO and a large European consortium completed the phase-A study of EPICS, an instrument dedicated to exoplanets direct imaging for the EELT. The very ambitious science goals of EPICS, the imaging of reflected light of mature gas giant exoplanets around bright stars, sets extremely strong requirements in terms of instrumental contrast achievable. The
Vérinaud, Christophe, Kasper, Markus E., Beuzit, Jean-Luc, Gratton, R. G., Mesa, Dino, Aller-Carpentier, Emmanuel, Fedrigo, Enrico, Abe, Lyu, Baudoz, Pierre, Boccaletti, Anthony, Bonavita, Mariangela, Dohlen, Kjetil, Hubin, Norbert N., Kerber, Florian, Korkiakoski, Visa, Antichi, Jacopo, Martinez, Patrice, Rabou, Patrick, Roelfsema, P. R., Schmid, Hans-Martin, Thatte, Niranjan A., Salter, Graeme, Tecza, Matthias, Venema, Lars, Hanenburg, Hiddo H., Jager, Rieks, Yaitskova, Natalia, Preis, Olivier, Orecchia, Mélanie, Stadler, Eric   +29 more
openaire   +3 more sources

Dynamics of Two Planets near a 2:1 Resonance: Case Studies of Known and Synthetic Exosystems on a Grid of Initial Configurations

Universe
The distribution of period ratios for 580 known two-planet systems is apparently nonuniform, with several sharp peaks and troughs. In particular, the vicinity of the 2:1 commensurability seems to have a deficit of systems.
Valeri Makarov, Alexey Goldin, Dimitri Veras   +2 more
doaj   +1 more source

Tools for Learning—Promoting Reflection for Student Teachers' Development of PCK

Journal of Research in Science Teaching, EarlyView.
ABSTRACT This paper investigates how the coherent integration of three different tools for reflection during a science methods course can contribute to student teachers' planning and enactment of science teaching, that is, their development of pedagogical content knowledge (PCK).
Pernilla Nilsson, Anne‐Marie Cederqvist   +1 more
wiley   +1 more source

Homogeneous Transit Timing Analyses of Ten Exoplanet Systems [PDF]

, 2022
16 pages, 5 figures, accepted for publication by the ...
Baştürk, Ö, Esmer, EM, Yalçınkaya, S, Torun, Ş, Mancini, L, Helweh, F, Karamanli, E, Southworth, J, Aliş, S, Wünsche, A, Tezcan, F, Aladağ, Y, Aksaker, N, Tunç, E, Davoudi, F, Fişek, S, Bretton, M, Evans, DF, Yeşilyaprak, C, Yılmaz, M, Tezcan, CT, Yelkenci, K   +21 more
openaire   +2 more sources