Results 21 to 30 of about 18,958 (240)
Environmental Microbiology, Volume 24, Issue 12, Page 5998-6016, December 2022., 2022 Abstract The pedogenesis from the mineral substrate released upon glacier melting has been explained with the succession of consortia of pioneer microorganisms, whose structure and functionality are determined by the environmental conditions developing in the moraine.
Eleonora Rolli +12 more
wiley +1 more source
The evolution of QSO spectra [PDF]
Monthly Notices of the Royal Astronomical Society, 1995 We find that the spectra of QSOs evolve: high redshift QSOs (z > 1.5) have lower equivalent width emission lines than low redshift QSOs (z < 0.5) with the same luminosities and radio properties.
Francis, Paul, Koratkar, Anuradha
openaire +3 more sources
Optical and UV properties of a radio‐loud and a radio‐quiet Population A quasar at high redshift
Astronomische Nachrichten, Volume 343, Issue 1-2, January-February 2022., 2022 Abstract Different properties of quasars may be observed and analyzed through the many ranges of the electromagnetic spectrum. Pioneering studies showed that an “H‐R diagram” for quasars was needed to organize these data, and that more than two dimensions were necessary: a four‐dimensional Eigenvector (4DE1) parameter space was proposed. The 4DE1 makes
Alice Deconto‐Machado +4 more
wiley +1 more source
The Astrophysical Journal, 2023 The recent discovery of enormous Ly α nebulae (ELANe), characterized by physical extents >200 kpc and Ly α luminosities >10 ^44 erg s ^−1 , provides a unique opportunity to study the intergalactic medium and circumgalactic medium in distant galaxies ...
Jessica S. Li +10 more
doaj +1 more source
, 1996 QSOs' emission lines arise from highest velocity (approximately 10000 km/s), dense gas within approximately 0.1 parsec of the central engine, out to low-velocity, low-density gas at great distances from the host galaxy. In radio-loud QSOs there are clear indications that the distribution and kinematics of emission-line gas are related to the symmetry ...
Beverley J. Wills, Michael S. Brotherton
openaire +4 more sources
The 2dF QSO Redshift Survey -- XI. The QSO power spectrum [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 14 pages, 13 figures.
Outram, P +7 more
openaire +5 more sources
The Analysis of a Proposed Experiment to Measure the Speed of Gravity in Short Distances
Advances in High Energy Physics, Volume 2022, Issue 1, 2022., 2022 In order to investigate the speed of gravitational signals travelling in air or through a different medium two experiments were designed. One of the experiments contains 2 masses rotating at very high speed and in the other experiment a sapphire bar will vibrate, in both cases they will emit a periodic tidal gravitational signal and one sapphire device
Carlos Frajuca +3 more
wiley +1 more source
Ecosphere, Volume 12, Issue 4, April 2021., 2021 Abstract The impacts of warming on communities and ecosystems are predicted to be significant in mountain ecosystems because physiological processes, including rates of carbon (C) cycling, are often more temperature‐sensitive in colder environments.
Case M. Prager +9 more
wiley +1 more source
Simulation of Lake‐Groundwater Interaction under Steady‐State Flow
Groundwater, Volume 59, Issue 1, Page 90-99, January/February 2021., 2021 Abstract MODFLOW is one of the most popular groundwater simulation tools available; however, the development of lake modules that can be coupled with MODFLOW is lacking apart from the LAK3 package. This study proposes a new approach for simulating lake‐groundwater interaction under steady‐state flow, referred to as the sloping lakebed method (SLM).
Chuiyu Lu +8 more
wiley +1 more source
Detection of Cosmological 21 cm Emission with the Canadian Hydrogen Intensity Mapping Experiment
The Astrophysical Journal, 2023 We present a detection of 21 cm emission from large-scale structure (LSS) between redshift 0.78 and 1.43 made with the Canadian Hydrogen Intensity Mapping Experiment.
The CHIME Collaboration +32 more
doaj +1 more source