Results 31 to 40 of about 166,316 (291)

Gravitational Microlensing Evidence for a Planet Orbiting a Binary Star System [PDF]

, 1999
The study of extra-solar planetary systems has emerged as a new discipline of observational astronomy in the past few years with the discovery of a number of extra-solar planets. The properties of most of these extra-solar planets were not anticipated by
A Udalski, A Udalski, A. C. Becker, B. A. Peterson, BS Gaudi, C Alard, C Alcock, C Han, D. Maoz, D. P. Bennett, DJ Lennon, DP Bennett, E Aubourg, E. M. Leibowitz, ELN Jensen, G Bertelli, GW Marcy, H. Mendelson, J Diaz-Cordoves, J Glanz, J. Dann, J. Quinn, M Dominik, M Mayor, MJ Holman, N. Butler, O. Shemmer, P Stetson, S Mao, S. E. Turner, S. H. Rhie, S. Kaspi, S. Thomson, Y. Lipkin   +33 more
core   +2 more sources

Cyclic sunspot activity during the first millennium CE as reconstructed from radiocarbon

Astronomy & Astrophysics
Context. Solar activity, dominated by 11-year cyclic evolution, has been observed directly since 1610 CE. Indirect cosmogenic proxy data have been used to reconstruct solar activity for millennia prior to 1610.
Usoskin I., Solanki S. K., Krivova N. A., Chatzistergos T.   +3 more
doaj   +1 more source

Analysis of COSIMA spectra: Bayesian approach [PDF]

Geoscientific Instrumentation, Methods and Data Systems, 2015
We describe the use of Bayesian analysis methods applied to time-of-flight secondary ion mass spectrometer (TOF-SIMS) spectra. The method is applied to the COmetary Secondary Ion Mass Analyzer (COSIMA) TOF-SIMS mass spectra where the analysis can be ...
H. J. Lehto, B. Zaprudin, K. M. Lehto, T. Lönnberg, J. Silén, J. Rynö, H. Krüger, M. Hilchenbach, J. Kissel   +8 more
doaj   +1 more source

Gravity Waves in Planetary Atmospheres: Their Effects and Parameterization in Global Circulation Models

Atmosphere, 2019
The dynamical and thermodynamical importance of gravity waves was initially recognized in the atmosphere of Earth. Extensive studies over recent decades demonstrated that gravity waves exist in atmospheres of other planets, similarly play a significant ...
Alexander S. Medvedev, Erdal Yiğit
doaj   +1 more source

Search for possible exomoons with FAST telescope

, 2017
Our knowledge of the Solar System, encourages us to beleive that we might expect exomoons to be present around some of the known exoplanets. With present hardware and existing optical astronomy methods we shall not be able to find exomoons at least 10 ...
Lukic, Dragan
core   +1 more source

Observations of interplanetary scintillation during the 1998 Whole Sun Month: a comparison between EISCAT, ORT and Nagoya data [PDF]

Annales Geophysicae, 2000
Observations of interplanetary scintillation (IPS) allow accurate solar wind velocity measurements to be made at all heliographic latitudes and at a range of distances from the Sun.
P. J. Moran, P. J. Moran, P. J. Moran, S. Ananthakrishnan, V. Balasubramanian, A. R. Breen, A. Canals, R. A. Fallows, P. Janardhan, P. Janardhan, M. Tokumaru, P. J. S. Williams   +11 more
doaj   +1 more source

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source

The Thirty Meter Telescope International Observatory facilitating transformative astrophysical science [PDF]

, 2017
The next major advancement in astronomy and cosmology will be driven by deep observations using very sensitive telescopes with high spatial and spectral resolution capabilities. An international consortium of astronomers, including Indian astronomers are
Anupama, G. C., Skidmore, Warren, Srianand, Raghunathan   +2 more
core   +1 more source

Linking Device Performance to Nanoscale Photoactivation of Grain Boundaries in 2D Hybrid Halide Perovskites

Advanced Materials Technologies, EarlyView.
The opto‐electronic response of polycrystalline (PEA)2PbBr4 thin films is investigated by correlating macroscopic photodetector performance with nanoscale mapping techniques. Grain boundary density is systematically tuned through crystallization control and linked to device responsivity.
Camilla Bordoni, Lorenzo Calcaterra, Andrea Ciavatti, Silvia Milita, Valentina Bonino, Lorenzo Margotti, Sara Cepić, Marisa Di Sabatino, Federico Boscherini, Daniela Cavalcoli, Beatrice Fraboni   +10 more
wiley   +1 more source

3D Modeling of Lacus Mortis Pit Crater with Presumed Interior Tube Structure [PDF]

Journal of Astronomy and Space Sciences, 2015
When humans explore the Moon, lunar caves will be an ideal base to provide a shelter from the hazards of radiation, meteorite impact, and extreme diurnal temperature differences.
Ik-Seon Hong, Yu Yi, Jaehyung Yu, Junichi Haruyama   +3 more
doaj   +1 more source