Results 81 to 90 of about 4,598,556 (263)

High resolution imaging with Fresnel interferometric arrays: suitability for exoplanet detection [PDF]

, 2005
We propose a new kind of interferometric array that yields images of high dynamic range and large field. The numerous individual apertures in this array form a pattern related to a Fresnel zone plate. This array can be used for astrophysical imaging over
Aime, D. Serre, Falklis, Guyon, Guyon, Koechlin, Koechlin, L. Koechlin, Nisenson, P. Duchon, Soummer   +10 more
core   +1 more source

Tools for Learning—Promoting Reflection for Student Teachers' Development of PCK

Journal of Research in Science Teaching, EarlyView.
ABSTRACT This paper investigates how the coherent integration of three different tools for reflection during a science methods course can contribute to student teachers' planning and enactment of science teaching, that is, their development of pedagogical content knowledge (PCK).
Pernilla Nilsson, Anne‐Marie Cederqvist   +1 more
wiley   +1 more source

Characterization of exoplanet hosts [PDF]

EPJ Web of Conferences, 2013
Spectroscopic analysis of exoplanet hosts and the stellar sample from which they are drawn provides abundances and other properties that quantitively constrain models of planet formation. The program Spectroscopy Made Easy (SME) determines stellar parameters by fitting observed spectra, though line lists must be selected wisely.
openaire   +2 more sources

Formation of Ultra-short-period Planets in Hot Jupiter Systems: Application to WASP-47

The Astrophysical Journal Letters
The WASP-47 system is notable as the first known system hosting both inner and outer low-mass planetary companions around a hot Jupiter, with an ultra-short-period (USP) planet as the innermost planetary companion.
Su Wang, Mengrui Pan, Yao Dong, Gang Zhao, Jianghui Ji   +4 more
doaj   +1 more source

TOI-1695 b: A Water World Orbiting an Early-M Dwarf in the Planet Radius Valley

The Astronomical Journal, 2023
Characterizing the bulk compositions of transiting exoplanets within the M dwarf radius valley offers a unique means to establish whether the radius valley emerges from an atmospheric mass-loss process or is imprinted by planet formation itself.
Collin Cherubim, Ryan Cloutier, David Charbonneau, Chris Stockdale, Keivan G. Stassun, Richard P. Schwarz, Boris Safonov, Annelies Mortier, Pablo Lewin, David W. Latham, Keith Horne, Raphaëlle D. Haywood, Erica Gonzales, Maria V. Goliguzova, Karen A. Collins, David R. Ciardi, Allyson Bieryla, Alexandre A. Belinski, Bill Wohler, Christopher A. Watson, Roland Vanderspek, Stéphane Udry, Alessandro Sozzetti, Damien Ségransan, Dimitar Sasselov, George R. Ricker, Ken Rice, Ennio Poretti, Giampaolo Piotto, Francesco Pepe, Emilio Molinari, Giuseppina Micela, Michel Mayor, Christophe Lovis, Mercedes López-Morales, Jon M. Jenkins, Zahra Essack, Xavier Dumusque, John P. Doty, Knicole D. Colón, Andrew Collier Cameron, Lars A. Buchhave   +41 more
doaj   +1 more source

Atomic iron and titanium in the atmosphere of the exoplanet KELT-9b [PDF]

Nature, 2018
To constrain the formation history of an exoplanet, we need to know its chemical composition1–3. With an equilibrium temperature of about 4,050 kelvin4, the exoplanet KELT-9b (also known as HD 195689b) is an archetype of the class of ultrahot Jupiters ...
J. Hoeijmakers, J. Hoeijmakers, D. Ehrenreich, K. Heng, D. Kitzmann, S. Grimm, R. Allart, R. Deitrick, A. Wyttenbach, Maria Oreshenko, L. Pino, P. Rimmer, P. Rimmer, E. Molinari, L. Fabrizio   +14 more
semanticscholar   +1 more source

Evolutionary and functional relationships between plant and microbial C1 metabolism in terrestrial ecosystems

New Phytologist, EarlyView.
Summary One‐carbon (C1) metabolism, centered on the universal methyl donor S‐adenosyl methionine (SAM), plays critical roles in biosynthesis, redox regulation, and stress responses across plants and microbes. A recently proposed photosynthetic C1 pathway links SAM methyl groups directly to RuBisCO‐mediated CO2 assimilation and integrates with nitrogen ...
Kolby J. Jardine, Linnea K. Honeker, Zhaoxin Zhang, Steve Kwatcho Kengdo, Yuguo Yang, Joseph Roscioli, William J. Riley   +6 more
wiley   +1 more source

Mapping out the time-evolution of exoplanet processes [PDF]

, 2019
There are many competing theories and models describing the formation, migration and evolution of exoplanet systems. As both the precision with which we can characterize exoplanets and their host stars, and the number of systems for which we can make ...
Beichman, Charles, Christiansen, Jessie L., Ciardi, David R., Huber, Daniel, Marley, Mark S.   +4 more
core   +1 more source

Pursuing the planet-debris disk connection: Analysis of upper limits from the Anglo-Australian Planet Search [PDF]

, 2015
Solid material in protoplanetary discs will suffer one of two fates after the epoch of planet formation; either being bound up into planetary bodies, or remaining in smaller planetesimals to be ground into dust.
Marshall, Jonathan P., Wittenmyer, Robert A.   +1 more
core   +2 more sources

Assessing the C/O Ratio Formation Diagnostic: A Potential Trend with Companion Mass

The Astronomical Journal, 2023
The carbon-to-oxygen (C/O) ratio in an exoplanet atmosphere has been suggested as a potential diagnostic of planet formation. Now that a number of exoplanets have measured C/O ratios, it is possible to examine this diagnostic at a population level. Here,
Kielan K. W. Hoch, Quinn M. Konopacky, Christopher A. Theissen, Jean-Baptiste Ruffio, Travis S. Barman, Emily L. Rickman, Marshall D. Perrin, Bruce Macintosh, Christian Marois   +8 more
doaj   +1 more source