Results 71 to 80 of about 45,635 (242)

Radial Velocities as an Exoplanet Discovery Method

open access: yes, 2017
The precise radial velocity technique is a cornerstone of exoplanetary astronomy. Astronomers measure Doppler shifts in the star's spectral features, which track the line-of/sight gravitational accelerations of a star caused by the planets orbiting it ...
B Campbell   +17 more
core   +1 more source

First results of the Kourovka Planet Search: discovery of transiting exoplanet candidates in the first three target fields [PDF]

open access: yes, 2016
We present the first results of our search for transiting exoplanet candidates as part of the Kourovka Planet Search (KPS) project. The primary objective of the project is to search for new hot Jupiters which transit their host stars, mainly in the ...
Balega, Yuri Yu.   +19 more
core   +1 more source

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

open access: yesGeochemistry, 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   +6 more
wiley   +1 more source

Trojan Exoplanets

open access: yes
Comment: Hans Deeg \S Juan Antonio Belmonte. Handbook of Exoplanets, 2nd Edition, Springer International Publishing AG, part of Springer Nature, In ...
Robutel, Philippe, Leleu, Adrien
openaire   +3 more sources

Exoplanet Predictions Based on Harmonic Orbit Resonances

open access: yes, 2017
The current exoplanet database includes 5454 confirmed planets and candidate planets observed with the KEPLER mission. We find 932 planet pairs from which we extract distance and orbital period ratios.
Aschwanden, Markus J., Scholkmann, Felix
core   +1 more source

Radial velocity eclipse mapping of exoplanets [PDF]

open access: yes, 2015
Planetary rotation rates and obliquities provide information regarding the history of planet formation, but have not yet been measured for evolved extrasolar planets.
Barnes J. W.   +23 more
core   +2 more sources

Boundaries of photosynthesis: adaptations of carbon fixation in extreme environments

open access: yesFEBS 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   +3 more
wiley   +1 more source

Coreless Terrestrial Exoplanets [PDF]

open access: yesThe Astrophysical Journal, 2008
Differentiation in terrestrial planets is expected to include the formation of a metallic iron core. We predict the existence of terrestrial planets that have differentiated but have no metallic core--planets that are effectively a giant silicate mantle.
Linda T. Elkins-Tanton, Sara Seager
openaire   +3 more sources

Selective Principal Component Extraction and Reconstruction: A Novel Method for Ground Based Exoplanet Spectroscopy

open access: yes, 2010
Context: Infrared spectroscopy of primary and secondary eclipse events probes the composition of exoplanet atmospheres and, using space telescopes, has detected H2O, CH4 and CO2 in three hot Jupiters. However, the available data from space telescopes has
A. Thatte   +15 more
core   +1 more source

Efficient Follow-Up of Exoplanet Transits Using Small Telescopes [PDF]

open access: yes, 2019
11 pages, 5 figures, to be published in PASP, comments welcomeHere, we introduce an online tool for the prediction of exoplanet transit light curves.
Beck, Peter   +4 more
core   +3 more sources

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