Results 51 to 60 of about 1,480 (207)

Comparing Geochemical and Geodynamical Models of Plume and Ridge Mantle Source Composition

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 8, August 2025.
Abstract We use a multidisciplinary approach to investigate how the parameter space of mantle convection affects present‐day mantle composition. We compare 22 forward geodynamical mantle circulation model simulations against 24 variants of a geochemical inversion model of the global radiogenic isotope data set of mantle‐derived lavas.
Paul Béguelin, James Panton, Morten Andersen, Tim Elliott, Huw Davies, Joel Rodney, Abigail Plimmer   +6 more
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

Detecting Exoplanet Transits with the Next Generation of X-Ray Telescopes

The Astronomical Journal
Detecting exoplanet transits at X-ray wavelengths would provide a window into the effects of high-energy irradiation on the upper atmospheres of planets.
Raven Cilley, George W. King, Lía Corrales   +2 more
doaj   +1 more source

Variability of Known Exoplanet Host Stars Observed by TESS

The Astronomical Journal, 2023
Both direct and indirect methods of exoplanet detection rely upon detailed knowledge of the potential host stars. Such stellar characterization allows for accurate extraction of planetary properties, as well as contributing to our overall understanding ...
Emilie R. Simpson, Tara Fetherolf, Stephen R. Kane, Joshua Pepper, Teo Močnik, Paul A. Dalba   +5 more
doaj   +1 more source

Boundaries of photosynthesis: adaptations of carbon fixation in extreme environments

FEBS Open Bio, Volume 15, Issue 7, Page 1028-1040, July 2025.
Photosynthesis faces challenges from environmental extremes of temperature, pH, and salinity, limiting gas diffusion, modifying membrane fluidity, and destabilizing photochemical and biochemical reactions. Photosynthetic organisms have evolved unique adaptations overcoming these stresses and maintaining their photosynthetic activity.
Pere Aguiló‐Nicolau, Concepción Iñiguez, Sebastià Capó‐Bauçà, Jeroni Galmés   +3 more
wiley   +1 more source

Three-dimensional Orbital Architectures and Detectability of Adjacent Companions to Hot Jupiters

The Astrophysical Journal
The orbital properties of the (as yet) small population of hot Jupiters with nearby planetary companions provide valuable constraints on the past migration processes of these systems.
Thomas MacLean, Juliette Becker
doaj   +1 more source

Research Progress on Atmospheric Turbulence Perception and Correction Based on Adaptive Optics and Deep Learning

Advanced Photonics Research, Volume 6, Issue 7, July 2025.
This work presents a systematic review of atmospheric turbulence fundamentals, including theoretical formulations and adaptive optics‐based mitigation strategies. This includes an in‐depth examination of the devices, theories, and methodologies associated with traditional correction approaches.
Qinghui Liu, Yihang Di, Mengmeng Zhang, Zhenbo Ren, Jianglei Di, Jianlin Zhao   +5 more
wiley   +1 more source

A NEW ANALYSIS OF THE EXOPLANET HOSTING SYSTEM HD 6434 [PDF]

The Astronomical Journal, 2015
The current goal of exoplanetary science is not only focused on detecting but characterizing planetary systems in hopes of understanding how they formed, evolved, and relate to the Solar System. The Transit Ephemeris Refinement and Monitoring Survey (TERMS) combines both radial velocity (RV) and photometric data in order to achieve unprecedented ground-
Genady Pilyavsky, Stephen R. Kane, Tabetha S. Boyajian, David James, Natalie R. Hinkel, Natalie R. Hinkel, Debra A. Fischer, Dominique Naef, Stéphane Udry   +8 more
openaire   +3 more sources

Zehn Jahre Gaia‐Messungen: Die hochgenaue Kartierung des Himmels

Physik in unserer Zeit, Volume 56, Issue 4, Page 175-183, July 2025.
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

Searching for transit timing variations in transiting exoplanet systems [PDF]

Proceedings of the International Astronomical Union, 2008
AbstractSearching for transit timing variations in the known transiting exoplanet systems can reveal the presence of other bodies in the system. Here we report such searches for two transiting exoplanet systems, TrES-1 and WASP-2. Their new transits were observed with the 4.2m William Herschel Telescope located on La Palma, Spain.
Ian Skillen, Chris Benn, Petr Harmanec, Simon Tulloch, Don Pollacco, Yogesh C. Joshi, Neale P. Gibson, M. Hrudková   +7 more
openaire   +3 more sources