Results 91 to 100 of about 21,297 (217)

High Pressure Formation of the Eight‐Fold Coordinated Post‐Post Spinel MgFe2O4

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract MgFe2O4 was probed to 74(1) GPa and 2,840(130) K as a low‐pressure analog to post‐post spinel Mg2SiO4 predicted in super‐Earths using synchrotron multigrain X‐ray diffraction techniques in the laser‐heated diamond anvil cell. With high‐temperatures above 65 GPa the eight‐fold coordinated δ‐MgFe2O4 (Th3P4‐type) is stable with Mg and Fe ...
Claire C. Zurkowski, Jing Yang, Stella Chariton, Vitali Prakapenka, Yingwei Fei   +4 more
wiley   +1 more source

Toward High-precision Mass Measurements of Two Sub-Neptunes in the K2-266 Planetary System Through Transit Timing

The Astronomical Journal
Sub-Neptunes have been found to be one of the most common types of exoplanets, yet their physical parameters and properties are poorly determined and in need of further investigation.
Ing-Guey Jiang, Li-Chin Yeh, Billy Edwards, Ming Yang, Keivan G. Stassun, Napaporn A-thano   +5 more
doaj   +1 more source

The Search for Stellar Companions to Exoplanet Host Stars Using the CHARA Array

, 2008
Most exoplanets have been discovered via radial velocity studies, which are inherently insensitive to orbital inclination. Interferometric observations will show evidence of a stellar companion if it sufficiently bright, regardless of the inclination ...
Ellyn K. Baines, Habets G. M. H. J., Harold A. McAlister, Imbert M., Judit Sturmann, Laszlo Sturmann, Mitchell D. S., Nils H. Turner, Perryman M. A. C., Stephen T. Ridgway, Theo A. ten Brummelaar   +10 more
core   +1 more source

Phase Topology Stability of an Optical Vortex via an Electrically Controlled Twist‐Planar Oriented Liquid Crystal Fresnel Lens

Advanced Optical Materials, Volume 14, Issue 5, 2 February 2026.
A simple and efficient method for determining the stability of optical vortices via Fourier transform using a conventional spherical lens is presented. The theoretical and experimental results demonstrate a practical approach to directly and unambiguously measure the magnitude and sign of the topological charge of a beam without altering an ...
Elena Melnikova, Katsiaryna Pantsialeyeva, Dmitry Gorbach, Alexei Tolstik, Sergei Slussarenko Jr., Alina Karabchevsky   +5 more
wiley   +1 more source

Architecture Classification for Extrasolar Planetary Systems

The Astronomical Journal
This paper presents a classification framework for the architectures of planetary systems based on a complete survey of the confirmed exoplanet population. With nearly 6000 confirmed exoplanets discovered, including more than 300 multiplanet systems with
Alex R. Howe, Juliette C. Becker, Christopher C. Stark, Fred C. Adams   +3 more
doaj   +1 more source

Symposium Review: Wild Animal Welfare is in Our Backyards

The Bulletin of the Ecological Society of America, Volume 107, Issue 2, April 2026.
Bonnie Fairbanks Flint, David R. Daversa, M. Camille Hopkins, Jessica X. Wright‐Lichter   +3 more
wiley   +1 more source

The effect of the stellar absorption line centre-to-limb variation on exoplanet transmission spectrum observations

, 2017
Transit spectroscopy is one of the most commonly used techniques for exoplanet atmosphere characterisation. This technique has been used to detect ionized and neutral species in exoplanet atmospheres by comparing the observed stellar lines in and out of ...
Fosbury, Robert A. E., Henning, Thomas, Pallé, Enric, Petr-Gotzens, Monika G., Yan, Fei   +4 more
core   +1 more source

TESS Hunt for Young and Maturing Exoplanets (THYME). XI. An Earth-sized Planet Orbiting a Nearby, Solar-like Host in the 400 Myr Ursa Major Moving Group

The Astronomical Journal
Young terrestrial worlds are critical test beds to constrain prevailing theories of planetary formation and evolution. We present the discovery of HD 63433 d—a nearby (22 pc), Earth-sized planet transiting a young Sun-like star (TOI-1726, HD 63433).
Benjamin K. Capistrant, Melinda Soares-Furtado, Andrew Vanderburg, Alyssa Jankowski, Andrew W. Mann, Gabrielle Ross, Gregor Srdoc, Natalie R. Hinkel, Juliette Becker, Christian Magliano, Mary Anne Limbach, Alexander P. Stephan, Andrew C. Nine, Benjamin M. Tofflemire, Adam L. Kraus, Steven Giacalone, Joshua N. Winn, Allyson Bieryla, Luke G. Bouma, David R. Ciardi, Karen A. Collins, Giovanni Covone, Zoë L. de Beurs, Chelsea X. Huang, Jon M. Jenkins, Laura Kreidberg, David W. Latham, Samuel N. Quinn, Sara Seager, Avi Shporer, Joseph D. Twicken, Bill Wohler, Roland K. Vanderspek, Ricardo Yarza, Carl Ziegler   +34 more
doaj   +1 more source

Eccentricity Evolution of Warm Jupiters: The Role of Distant Perturbers and nearby Companions

The Astrophysical Journal
Warm Jupiters (WJs)—giant exoplanets with orbital periods between 10 and 200 days—exhibit a broad range of eccentricities and are often accompanied by nearby low-mass planets.
Ying He, Dong-Hong Wu, Sheng Jin
doaj   +1 more source

Ruling Out Possible Secondary Stars to Exoplanet Host Stars Using the CHARA Array

, 2010
Of the over 450 exoplanets known to date, more than 420 of them have been discovered using radial velocity studies, a method that tells nothing about the inclination of the planet's orbit.
Allende Prieto, Baines, Baines, Baines, Baines, Bartkevicius, Berger, Boden, Butler, Butler, Christopher D. Farrington, Cohen, Cox, Cutri, Ellyn K. Baines, ESA, Habets, Hanbury Brown, Hanbury Brown, Harold A. McAlister, Hatzes, Imbert, Johnson, Johnson, Judit Sturmann, Konacki, Laszlo Sturmann, McAlister, Mermilliod, Monet, Neugebauer, Nils H. Turner, P. J. Goldfinger, Press, Prugniel, Sato, Sato, Schuler, Soubiran, Stephen T. Ridgway, ten Brummelaar, Theo A. ten Brummelaar, van Belle, van Leeuwen, Vogt, Wittenmyer, Wright   +46 more
core   +1 more source