Results 41 to 50 of about 85,212 (150)

Cosmic balloons [PDF]

Physical Review D, 1994
Cosmic balloons, consisting of relativistic particles trapped inside a spherical domain wall, may be created in the early universe. We calculate the balloon mass $M$ as a function of the radius $R$ and the energy density profile, $ (r)$, including the effects of gravity. At the maximum balloon mass $2GM/R\approx 0.52$ for any value of the mass density
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On the dusty proximate damped Lyman-α system toward Q 2310−3358 at z = 2.40

Astronomy & Astrophysics
Quasar absorption systems not only affect the way quasars are selected, but also serve as key probes of galaxies, providing insight into their chemical evolution and interstellar medium (ISM). Recently, a method based on Gaia astrometric measurements has
Han S., Krogager J.-K., Ledoux C., Ma G., Heintz K. E., Geier S. J., Christensen L., Møller P., Fynbo J. P. U.   +8 more
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Comparison of global observations and trends of total precipitable water derived from microwave radiometers and COSMIC radio occultation from 2006 to 2013 [PDF]

Atmospheric Chemistry and Physics, 2018
We compare atmospheric total precipitable water (TPW) derived from the SSM/I (Special Sensor Microwave Imager) and SSMIS (Special Sensor Microwave Imager/Sounder) radiometers and WindSat to collocated TPW estimates derived from COSMIC (Constellation ...
S.-P. Ho, L. Peng, C. Mears, R. A. Anthes   +3 more
doaj   +1 more source

Comparison of COSMIC and COSMIC-2 Radio Occultation Refractivity and Bending Angle Uncertainties in August 2006 and 2021

Atmosphere, 2022
We compare the random error statistics (uncertainties) of COSMIC (Constellation Observing System for Meteorology, Ionosphere and Climate, C1) and COSMIC-2 (C2) radio occultation (RO) bending angles and refractivities for the months of August 2006 and ...
Richard Anthes, Jeremiah Sjoberg, Xuelei Feng, Stig Syndergaard   +3 more
doaj   +1 more source

Multi-instrument observations of ionospheric super plasma bubbles in the European longitude sector during the 23–24 April 2023 severe geomagnetic storm

Journal of Space Weather and Space Climate
This study’s objective is to better specify the rare occurrence of super equatorial plasma bubbles in particular to the European longitude sector, detailing their spatio-temporal evolution, and better understanding pre-conditions for their development ...
Zakharenkova Irina, Cherniak Iurii, Braun John J., Wu Qian, Sokolovskiy Sergey, Hunt Douglas, Weiss Jan-Peter   +6 more
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Ground strains induced by the 2022 Hunga-Tonga volcanic eruption, observed by a 1500-m laser strainmeter at Kamioka, Japan

Earth, Planets and Space, 2023
In this study, we detected the horizontal ground strains induced by the atmospheric Lamb wave emitted from the 2022 eruption of the Tonga–Hunga Ha’apai undersea volcano, at an underground observatory in Kamioka, Japan.
Akiteru Takamori, Akito Araya, Kouseki Miyo, Tatsuki Washimi, Takaaki Yokozawa, Hideaki Hayakawa, Masatake Ohashi   +6 more
doaj   +1 more source

Three-dimensional earthward fast flow in the near-Earth plasma sheet in a sheared field: comparisons between simulations and observations [PDF]

Annales Geophysicae, 2009
Three-dimensional configuration of earthward fast flow in the near-Earth plasma sheet is studied using three-dimensional magnetohydrodynamics (MHD) simulations on the basis of the spontaneous fast reconnection model.
K. Kondoh, M. Ugai
doaj   +1 more source

Cosmic Vine: High abundance of massive galaxies and dark matter halos in a forming cluster at z = 3.44

Astronomy & Astrophysics
The Cosmic Vine is a massive protocluster at z = 3.44 in the JWST CEERS field, offering an ideal laboratory for studying the early phases of cluster formation.
Sillassen Nikolaj B., Jin Shuowen, Magdis Georgios E., Valentino Francesco, Daddi Emanuele, Gobat Raphael, Brinch Malte, Ito Kei, Wang Tao, Sun Hanwen, Brammer Gabriel, Toft Sune, Greve Thomas R.   +12 more
doaj   +1 more source

The STELLA Robotic Observatory on Tenerife

Advances in Astronomy, 2010
The Astrophysical Institute Potsdam (AIP) and the Instituto de Astrofísica de Canarias (IAC) inaugurated the robotic telescopes STELLA-I and STELLA-II (STELLar Activity) on Tenerife on May 18, 2006.
Klaus G. Strassmeier, Thomas Granzer, Michael Weber, Manfred Woche, Emil Popow, Arto Järvinen, Janos Bartus, Svend-Marian Bauer, Frank Dionies, Thomas Fechner, Wilbert Bittner, Jens Paschke   +11 more
doaj   +1 more source

Cosmic Hail

Das Questões, 2021
This poem takes the form of an ode to a speck of cosmic dust, tracking its journey across deep time and orbital space to its encounter with a living Earth.
openaire   +3 more sources