Results 31 to 40 of about 1,480 (207)

Search for (sub)stellar Companions of Exoplanet Hosts by Exploring the Second ESA-Gaia Data Release

Frontiers in Astronomy and Space Sciences, 2021
We present the latest results of an ongoing multiplicity survey of exoplanet hosts, which was initiated at the Astrophysical Institute and University Observatory Jena, using data from the second data release of the ESA-Gaia mission.
K.-U. Michel, M. Mugrauer
doaj   +1 more source

TOI-2525 b and c: A Pair of Massive Warm Giant Planets with Strong Transit Timing Variations Revealed by TESS

The Astronomical Journal, 2023
The K-type star TOI-2525 has an estimated mass of M = ${0.849}_{-0.033}^{+0.024}$ M _⊙ and radius of R = ${0.785}_{-0.007}^{+0.007}$ R _⊙ observed by the TESS mission in 22 sectors (within sectors 1 and 39).
Trifon Trifonov, Rafael Brahm, Andrés Jordán, Christian Hartogh, Thomas Henning, Melissa J. Hobson, Martin Schlecker, Saburo Howard, Finja Reichardt, Nestor Espinoza, Man Hoi Lee, David Nesvorny, Felipe I. Rojas, Khalid Barkaoui, Diana Kossakowski, Gavin Boyle, Stefan Dreizler, Martin Kürster, René Heller, Tristan Guillot, Amaury H. M. J. Triaud, Lyu Abe, Abdelkrim Agabi, Philippe Bendjoya, Nicolas Crouzet, Georgina Dransfield, Thomas Gasparetto, Maximilian N. Günther, Wenceslas Marie-Sainte, Djamel Mékarnia, Olga Suarez, Johanna Teske, R. Paul Butler, Jeffrey D. Crane, Stephen Shectman, George R. Ricker, Avi Shporer, Roland Vanderspek, Jon M. Jenkins, Bill Wohler, Karen A. Collins, Kevin I. Collins, David R. Ciardi, Thomas Barclay, Ismael Mireles, Sara Seager, Joshua N. Winn   +46 more
doaj   +1 more source

The Demographics of Terrestrial Planets in the Venus Zone

The Astronomical Journal, 2023
Understanding the physical characteristics of Venus, including its atmosphere, interior, and its evolutionary pathway with respect to Earth, remains a vital component for terrestrial planet evolution models and the emergence and/or decline of planetary ...
Colby Ostberg, Stephen R. Kane, Zhexing Li, Edward W. Schwieterman, Michelle L. Hill, Kimberly Bott, Paul A. Dalba, Tara Fetherolf, James W. Head, Cayman T. Unterborn   +9 more
doaj   +1 more source

The study of exoplanets and protoplanetary discs in the Main astronomical observatory of NAS of Ukraine

Вісник Астрономічної школи, 2016
Long-term spectral and photometric observations of transit and nontransit exoplanet systems are carried out in MAO NAS of Ukraine. On the base of obtained data we study the influence of exoplanets on chromospherical activity of the host stars, model the ...
Yu. Kuznyetsova, V. N. Krushevska, O. V. Zakhozhay, O. M. Matsiaka, A. P. Vidmachenko, Ya. O. Shliakhetskaya, M. V. Andreev, Ya. O. Romanyuk   +7 more
doaj   +1 more source

Statistical Trends in the Obliquity Distribution of Exoplanet Systems [PDF]

The Astronomical Journal, 2018
Abstract Important clues to the formation and evolution of planetary systems can be inferred from the stellar obliquity ψ. We study the distribution of obliquities using the California-Kepler Survey and the TEPCat Catalog of Rossiter–McLaughlin (RM) measurements, from which we extract, respectively, 275 and 118 targets.
Diego J. Muñoz, Diego J. Muñoz, Diego J. Muñoz, Hagai B. Perets   +3 more
openaire   +3 more sources

The observation of exoplanet transit events in China

EPJ Web of Conferences, 2011
We have carried out a research project on the exoplanet transit events at Yunnan Observatory. By using CCD cameras attached to 1m telescope of Yunnan Observatory and 85cm telescope of Xinglong station, NAOC, a group of exoplanet systems with transit ...
Fang X.-S., Collier Cameron A., Gu S.-H., Wang X.-B.   +3 more
doaj   +1 more source

The K2 and TESS Synergy. II. Revisiting 26 Systems in the TESS Primary Mission

The Astronomical Journal, 2023
The legacy of NASA’s K2 mission has provided hundreds of transiting exoplanets that can be revisited by new and future facilities for further characterization, with a particular focus on studying the atmospheres of these systems. However, the majority of
Erica Thygesen, Jessica A. Ranshaw, Joseph E. Rodriguez, Andrew Vanderburg, Samuel N. Quinn, Jason D. Eastman, Allyson Bieryla, David W. Latham, Roland K. Vanderspek, Jon M. Jenkins, Douglas A. Caldwell, Mma Ikwut-Ukwa, Knicole D. Colón, Jessie Dotson, Christina Hedges, Karen A. Collins, Michael L. Calkins, Perry Berlind, Gilbert A. Esquerdo   +18 more
doaj   +1 more source

Solar System Planets and Exoplanets

, 2021
Solar System planets have been studied for centuries, but the observation of exoplanets is only a few decades old. Consequently, knowledge of exoplanets is considerably more limited than Solar System planets. This chapter reviews the essential characteristics of Solar System planets and associated data derived from a variety of observational approaches.
openaire   +4 more sources

A Candidate High-velocity Exoplanet System in the Galactic Bulge

The Astronomical Journal
Abstract We present an analysis of adaptive optics images from the Keck I telescope of the microlensing event MOA-2011-BLG-262. The original discovery paper by Bennett et al. reports two possibilities for the lens system: a nearby gas giant lens with an exomoon companion or a very low-mass star with a planetary companion in the Galactic ...
Sean K. Terry, Jean‐Philippe Beaulieu, D. P. Bennett, Aparna Bhattacharya, Jon Hulberg, Macy Huston, Naoki Koshimoto, Joshua W. Blackman, I. A. Bond, Andrew A. Cole, Jessica R. Lu, ‪Clément Ranc, Natalia E. Rektsini, Aikaterini Vandorou   +13 more
openalex   +7 more sources

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