Results 11 to 20 of about 2,410,070 (200)

New spectral functions of the near-ground albedo derived from aircraft diffraction spectrometer observations [PDF]

open access: yes, 2014
The airborne spectral observations of the upward and downward irradiances are revisited to investigate the dependence of the near-ground albedo as a function of wavelength in the entire solar spectrum for different surfaces (sand, water, snow) and under ...
C. A. Varotsos   +9 more
core   +2 more sources

Core-collapse Supernova Explosions in Active Galactic Nucleus Accretion Disks

open access: yesThe Astrophysical Journal, 2023
Astrophysical events that occur in active galactic nucleus (AGN) disks are believed to differ significantly from the ordinary in the interstellar medium.
Fu-Lin Li   +6 more
doaj   +1 more source

Joe Pawsey and the Founding of Australian Radio Astronomy [PDF]

open access: yes, 2023
This open access book is a biography of Joseph L. Pawsey. It examines not only his life but the birth and growth of the field of radio astronomy and the state of science itself in twentieth century Australia.
Ekers, Ronald D.   +2 more
core   +1 more source

The On-orbit Performance of the Colorado Ultraviolet Transit Experiment Mission

open access: yesThe Astronomical Journal, 2023
We present the on-orbit performance of the Colorado Ultraviolet Transit Experiment (CUTE). CUTE is a 6U CubeSat that launched on 2021 September 27 and is obtaining near-ultraviolet (NUV; 2480 Å-3306 Å) transit spectroscopy of short-period exoplanets. The
Arika Egan   +7 more
doaj   +1 more source

Open skies: the National Radio Astronomy Observatory and its impact on US radio astronomy [PDF]

open access: yes, 2020
This open access book on the history of the National Radio Astronomy Observatory covers the scientific discoveries and technical innovations of late 20th century radio astronomy with particular attention to the people and institutions involved.
Kellermann, Kenneth I.   +5 more
core   +1 more source

The effect of the impact of comet Shoemaker Levy‐9 on Jupiter's aurorae [PDF]

open access: yes, 1995
We present infrared spectra and images of the jovian aurorae taken at wavelengths sensitive to the H-3(+) molecular ion during the period around the impact of Comet Shoemaker Levy-9.
Tennyson, J.   +25 more
core   +1 more source

Estimating the contribution from different ionospheric regions to the TEC response to the solar flares using data from the international GPS network [PDF]

open access: yesAnnales Geophysicae, 2002
This paper proposes a new method for estimating the contribution from different ionospheric regions to the response of total electron content variations to the solar flare, based on data from the international network of two-frequency multichannel ...
L. A. Leonovich   +4 more
doaj   +1 more source

Imprints from the solar cycle on the helium atom and helium pickup ion distributions [PDF]

open access: yesAnnales Geophysicae, 2003
Neutral interstellar helium atoms penetrate into the solar system almost unaffected by gas–plasma interactions in the heliospheric interface region, and thus can be considered as carriers of original information on the basic parameters (like ...
D. Rucinski   +3 more
doaj   +1 more source

The IAU recommended photometric system for ultraviolet astronomy

open access: yes, 2023
International audienceAbstract In the current era when access to space is becoming easier and at a lower cost thanks to the standardised cubesat technology, numerous missions are expected to be launched to observe, particularly, at ultraviolet ...
Noah Brosch   +16 more
core   +1 more source

Galaxy and mass assembly (GAMA) : end of survey report and data release 2 [PDF]

open access: yes, 2015
The Galaxy And Mass Assembly (GAMA) survey is one of the largest contemporary spectroscopic surveys of low redshift galaxies. Covering an area of ~286 deg2 (split among five survey regions) down to a limiting magnitude of r
Loveday, J   +284 more
core   +1 more source

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