Results 21 to 30 of about 20,094 (246)
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
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 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
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
Journal of the Royal Society of New Zealand, Volume 51, Issue 3-4, Page 489-512, September ‐ December 2021., 2021 ABSTRACT On the occasion of the 150th anniversary of Ernest Rutherford's birth I discuss how indistinguishabilty profoundly affects the collisions of identical particles. In the case of a Coulombic interaction this leads to a dramatic modification of Rutherford's famous scattering formula as predicted by Nevill Mott.
Niels Kjærgaard
wiley +1 more source
The Astronomical Journal, 2023 The Star Formation Across Cosmic Time (SFACT) survey is a new narrowband survey designed to detect emission-line galaxies (ELGs) and quasi-stellar objects (QSOs) over a wide range of redshifts in discrete redshift windows.
David J. Carr +4 more
doaj +1 more source
A sample of radio-loud QSOs at redshift ~ 4 [PDF]
, 2003 We obtained spectra of 60 red, starlike objects (E< 18.8) identified with FIRST radio sources, S_{1.4GHz} > 1 mJy. Eight are QSOs with redshift z> 3.6.Combined with our pilot search (Benn et al 2002), our sample of 121 candidates yields a total of 18 z >
Anderson +43 more
core +3 more sources
, 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 ...
Wills, Beverley J., Brotherton, M. S.
openaire +2 more sources
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
The Astrophysical Journal, 2002 In the Chandra Deep Field South 1Msec exposure we have found, at redshift 3.700 +- 0.005, the most distant Type 2 AGN ever detected. It is the source with the hardest X-ray spectrum with redshift z>3. The optical spectrum has no detected continuum emission to a 3sigma detection limit of ~3 10^{-19} ergs/s/cm^2/AA and shows narrow lines of Ly_alpha ...
Norman C +16 more
openaire +4 more sources