Results 51 to 60 of about 22,677,777 (195)

Star-exoplanet interactions: A growing interdisciplinary field in heliophysics

Frontiers in Astronomy and Space Sciences, 2023
Traditionally, heliophysics is characterized as the study of the near-Earth space environment, where plasmas and neutral gases originating from the Earth, the Sun, and other solar system bodies interact in ways that are detectable only through in-situ or
K. Garcia‐Sage, A. Farrish, V. Airapetian, D. Alexander, O. Cohen, S. Domagal‐Goldman, C. Dong, G. Gronoff, A. J. Halford, J. Lazio, J. Luhmann, E. Schwieterman, A. Sciola, A. Segura, F. Toffoletto, J. Vievering, Md Redyan Ahmed, K. Bali, G. Rau   +18 more
semanticscholar   +1 more source

Predictions of the Nancy Grace Roman Space Telescope Galactic Exoplanet Survey. II. Free-floating Planet Detection Rates [PDF]

Astronomical Journal, 2020
The Nancy Grace Roman Space Telescope (Roman) will perform a Galactic Exoplanet Survey (RGES) to discover bound exoplanets with semimajor axes greater than 1 au using gravitational microlensing. Roman will even be sensitive to planetary-mass objects that
Samson A. Johnson, M. Penny, B. Gaudi, E. Kerins, N. Rattenbury, Annie C. Robin, S. Calchi Novati, Calen Henderson   +7 more
semanticscholar   +1 more source

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

Application of Bayesian model inadequacy criterion for multiple data sets to radial velocity models of exoplanet systems [PDF]

, 2011
We present a simple mathematical criterion for determining whether a given statistical model does not describe several independent sets of measurements, or data modes, adequately.
M. Tuomi, D. Pinfield, H. Jones
semanticscholar   +1 more source

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

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

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

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

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