Results 61 to 70 of about 22,639,627 (262)

From Methane to Nanodiamond Precursors in Water: Superacid‐like Condensation Pathways Under Extreme Conditions

Angewandte Chemie, Volume 138, Issue 3, 16 January 2026.
Under extreme pressure and temperature, superionic water acts as a strong superacid, catalyzing methane polycondensation through pentacoordinated carbonium ions (CH5+). This discovery reveals the non‐classical carbocation chemistry underlying the early stages of diamond formation in water under extreme conditions.
Thomas Thévenet, Axel Dian, Matteo Cioni, Alexis Markovits, Sandro Scandolo, Arthur France‐Lanord, Flavio Siro Brigiano   +6 more
wiley   +2 more sources

Solar System Physics for Exoplanet Research

Publications of the Astronomical Society of the Pacific, 2020
Abstract Over the past three decades, we have witnessed one of the great revolutions in our understanding of the cosmos—the dawn of the Exoplanet Era. Where once we knew of just one planetary system (the solar system), we now know of thousands, with new systems being announced on a weekly basis.
J. Horner, S. R. Kane, J. P. Marshall, P. A. Dalba, T. R. Holt, J. Wood, H. E. Maynard-Casely, R. Wittenmyer, P. S. Lykawka, M. Hill, R. Salmeron, J. Bailey, T. Löhne, M. Agnew, B. D. Carter, C. C. E. Tylor   +15 more
openaire   +3 more sources

Exoplanet secondary atmosphere loss and revival [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2020
Significance Earth and Venus have significant atmospheres, but Mercury does not. Thousands of exoplanets are known, but we know almost nothing about rocky exoplanet atmospheres. Many rocky exoplanets were formed by a sub-Neptune-to-super-Earth conversion
E. Kite, M. Barnett
semanticscholar   +1 more source

The multiplicity of exoplanet host stars - New low-mass stellar companions of the exoplanet host stars HD125612 and HD212301

, 2008
Aims: We present new results from our ongoing multiplicity study of exoplanet host stars, carried out with SofI/NTT. We provide the most recent list of confirmed binary and triple star systems that harbor exoplanets.
Bakos, Bakos, Baraffe, Bonavita, Chauvin, Chauvin, Cushing, Desidera, Eggenberger, Eggenberger, Fischer, Holman, Holmberg, Lagrange, Liu, Lo Curto, Luhman, Luhman, M. Mugrauer, Mayor, Monet, Mugrauer, Mugrauer, Mugrauer, Mugrauer, Mugrauer, Mugrauer, Mugrauer, Mugrauer, Neuhäuser, Patience, Pickles, R. Neuhäuser, Raghavan, Reid, Skrutskie, Tamuz   +36 more
core   +1 more source

The Ultraviolet Radiation Environment Around M dwarf Exoplanet Host Stars [PDF]

, 2012
The spectral and temporal behavior of exoplanet host stars is a critical input to models of the chemistry and evolution of planetary atmospheres. At present, little observational or theoretical basis exists for understanding the ultraviolet spectra of M ...
Bushinsky, Rachel, Desert, Jean-Michel, France, Kevin, Froning, Cynthia S., Linsky, Jeffrey L., Mauas, Pablo, Roberge, Aki, Stocke, John T., Tian, Feng, Vieytes, Mariela, Walkowicz, Lucianne M.   +10 more
core   +4 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

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

Proceedings of the International Astronomical Union, 2008
Searching 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.
M. Hrudkov'a, I. Skillen, C. Benn, D. Pollacco, N. Gibson, Y. Joshi, P. Harmanec, Simon Tulloch Astronomical Institute of the Charles University, Prague, Czech Republic, Isaac Newton Group of Telescopes, L. Palma, Spain, Queen's University of Belfast, Belfast, UK.   +15 more
semanticscholar   +1 more source

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

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

Spin-orbit measurements and refined parameters for the exoplanet systems WASP-22 and WASP-26 [PDF]

, 2011
We report on spectroscopic and photometric observations through transits of the exoplanets WASP-22b and WASP-26b, intended to determine the systems’ spin-orbit angles. We combine these data with existing data to refine the system parameters.
D. Anderson, A. Cameron, M. Gillon, C. Hellier, E. Jehin, M. Lendl, D. Queloz, B. Smalley, A. Triaud, M. Vanhuysse   +9 more
semanticscholar   +1 more source