Results 41 to 50 of about 1,798,975 (310)

Stability of pulsar rotational and orbital periods [PDF]

, 2009
Millisecond and binary pulsars are the most stable astronomical standards of frequency. They can be applied to solving a number of problems in astronomy and time-keeping metrology including the search for a stochastic gravitational wave background in the
Hobbs, Ilyasov, Ilyasov, Ilyasov, Petit, Sergei Kopeikin   +5 more
core   +2 more sources

Astrophysical implications of hypothetical stable TeV-scale black holes [PDF]

, 2008
We analyze macroscopic effects of TeV-scale black holes, such as could possibly be produced at the LHC, in what is regarded as an extremely hypothetical scenario in which they are stable and, if trapped inside Earth, begin to accrete matter. We examine a
C. Barcelo, C. J. Hansen, D. E. Groom, D. P. Kilcrease, D. R. Lorimer, E. V. Derishev, F. Birch, F. Birch, F. Hoyle, F. Hoyle, F. Hoyle, F. Verbunt, G. T. Zatsepin, G. T. Zatsepin, H. Bondi, H. Bondi, J. Abraham, J. Frank, M. C. Begelman, Michelangelo L. Mangano, S. L. Shapiro, S. O. Kepler, Steven B. Giddings   +22 more
core   +4 more sources

"Superluminal" FITS File Processing on Multiprocessors: Zero Time Endian Conversion Technique

, 2013
The FITS is the standard file format in astronomy, and it has been extended to agree with astronomical needs of the day. However, astronomical datasets have been inflating year by year.
Eguchi, Satoshi
core   +1 more source

Scheduling and calibration strategy for continuous radio monitoring of 1700 sources every three days [PDF]

, 2014
The Owens Valley Radio Observatory 40 meter telescope is currently monitoring a sample of about 1700 blazars every three days at 15 GHz, with the main scientific goal of determining the relation between the variability of blazars at radio and gamma-rays ...
Max-Moerbeck, Walter
core   +2 more sources

Early Cretaceous Terrestrial Milankovitch Cycles in the Luanping Basin, North China and Time Constraints on Early Stage Jehol Biota Evolution

Frontiers in Earth Science, 2020
This research analyzes the cyclostratigraphy of the lacustrine Dabeigou Formation (DBG) of early Jehol Biota age (∼130–135 Ma) in the Luanping Basin, northern China.
Wei Liu, Wei Liu, Huaichun Wu, Huaichun Wu, Linda A. Hinnov, Dangpeng Xi, Huaiyu He, Shihong Zhang, Tianshui Yang   +8 more
doaj   +1 more source

Les effets optiques de la turbulence atmosphérique dans les images astronomiques

Comptes Rendus. Physique, 2023
The often blurry appearance of astronomical images at a telescope focus is attributed to atmospheric agitation.The study of the light propagation through the turbulent Earth atmosphere has made it possible to understand the existence of optical ...
Bonneau, Daniel
doaj   +1 more source

Astronomical Time Scale of the Late Pleistocene in the Northern South China Sea Based on Carbonate Deposition Record

Journal of Marine Science and Engineering
Variations in solar insolation caused by changes in the Earth’s orbit—specifically its eccentricity, obliquity, and precession—can leave discernible marks on the geologic record.
Chunhui Zhang, Wanyi Zhang, Chengjun Zhang, Liwei Zheng, Shiyi Yan, Yuanhao Ma, Wei Dang   +6 more
doaj   +1 more source

Application of Semi-Airborne Frequency Domain Electromagnetic Data Based on Improved Ant-Colony-Optimized Wavelet Threshold Denoising Method

IEEE Access, 2022
The semi-airborne frequency domain electromagnetic detection method is a popular electromagnetic detection method in which the transmission system is excited on the ground and the reception system coil is in the air to measure the vertical magnetic field
Jigen Xia, Ximei Qiao, Zhiqiang Li, Jian Wu, Xingmeng Dong, Yuwen Zhai   +5 more
doaj   +1 more source

Precession-driven climate cycles and time scale prior to the Hirnantian glacial maximum

Geology, 2021
Paleozoic astrochronologies are limited by uncertainties in past astronomical configurations and the availability of complete stratigraphic sections with precise, independent age control.
M. Sinnesael, Patrick Mclaughlin, André Desrochers, A. Mauviel, J. D. Weirdt, Philippe Claeys, T. Vandenbroucke   +6 more
semanticscholar   +1 more source

Bianchi-V string cosmological model and late time acceleration

, 2012
In the present work we have searched the existence of the late time acceleration of the universe with string fluid as source of matter in Bianchi V space-time.
Anil Kumar Yadav, Bali, Chakraborty, Kibble, Pogosian, Riess, Yadav, Zeldovich   +7 more
core   +1 more source