Results 81 to 90 of about 832,537 (179)

Galactic Cosmic Ray Interaction with the Perseus Giant Molecular Cloud Using Geant4 Monte Carlo Simulation

Universe
Galactic cosmic rays (GCRs), composed of protons and atomic nuclei, are accelerated in sources such as supernova remnants and pulsar wind nebulae, reaching energies up to the PeV range.
Luan Torres, Luiz Augusto Stuani Pereira
doaj   +1 more source

Astrochemistry of the Molecular Gas in Dusty Star-Forming Galaxies at the Cosmic Noon

Galaxies
Far-infrared and submillimeter observations have established the fundamental role of dust-obscured star formation in the assembly of stellar mass over the past ∼12 billion years.
Francesca Perrotta, Martina Torsello, Marika Giulietti, Andrea Lapi   +3 more
doaj   +1 more source

The Lyα Sky as Observed by New Horizons at 57 au

The Astronomical Journal
During 2023 September the Alice ultraviolet spectrograph on the New Horizons (NH) spacecraft was used to map diffuse Lyα emission over most of the sky, at a range of ∼56.9 au from the Sun.
G. Randall Gladstone, J. Michael Shull, Wayne R. Pryor, Jonathan Slavin, Joshua A. Kammer, Tracy M. Becker, Tod R. Lauer, Marc Postman, John R. Spencer, Joel Wm. Parker, Kurt D. Retherford, Michael A. Velez, Maarten H. Versteeg, Michael W. Davis, Cynthia S. Froning, Camden D. Ertley, Nathaniel Cunningham, Jayant Murthy, Richard C. Henry, Seth Redfield, Carey M. Lisse, Kelsi N. Singer, Anne J. Verbiscer, Pontus C. Brandt, S. Alan Stern   +24 more
doaj   +1 more source

Modeling of Interstellar Dust Grains

, 2008
Dust has two major effects on light passing through the Interstellar Medium - Interstellar Extinction and Reddening. Interstellar dust grains are typically a fraction of a micron, approximately the wavelength of blue light and hence light passing ...
Rao, Nagalakshmi A.
core   +1 more source

Air transport and the EU's emissions trading scheme. European Policy Paper #13, June 2009 [PDF]

, 2009
This paper examines the EU’s strategy for containing aircraft emissions as embodied in the new legislation on aviation emissions, as well as criticisms of this strategy and the political and technical problems it faces.
Staniland, Martin.
core  

Bankruptcy Risk and Imperfectly Enforced Emissions Taxes [PDF]

Under favorable but reasonable conditions, an imperfectly enforced emissions tax produces the efficient allocation of individual emissions control; aggregate emissions are independent of whether enforcement of the tax is sufficient to induce the full ...
Wei Zhang, John K. Stranlund
core  

Foreground Emission Randomization Due to Dynamics of Magnetized Interstellar Medium: WMAP and Planck Frequency Bands

Foundations
Using the results of numerical simulations and astrophysical observations (mainly in the WMAP and Planck frequency bands), it is shown that Galactic foreground emission becomes more sensitive to the mean magnetic field with the frequency, resulting in ...
Alexander Bershadskii
doaj   +1 more source

88th Annual Meeting of the Meteoritical Society 2026: Contents

Meteoritics &Planetary Science, Volume 61, Issue S1, Page S2-S47, August 2026.
wiley   +1 more source

Australia’s future emissions reduction targets [PDF]

, 2015
Presents the Climate Change Authority\u27s recommendations on Australia\u27s future emissions reduction targets, and constitutes the first part of the Authority\u27s response to the Special Review requested by the Minister for the Environment in December
Climate Change Authority
core  

Interstellar Ultraviolet Lyα High Resolution Mapping from the New Horizons P-Alice Instrument

The Astronomical Journal
We present New Horizons Alice spectral observations of interstellar hydrogen Ly α emissions at a vantage point of 57 au from the Sun. The observations were conducted as a pair of orthogonal scans to produce high spatial angular resolution measurements of
Tracy M. Becker, G. Randall Gladstone, Joel Wm. Parker, J. Michael Shull, Seth Redfield, Sarah Ruetschle, Nathaniel J. Cunningham, Cynthia S. Froning, Joshua A. Kammer, John R. Spencer, Marc Postman, Tod R. Lauer, Jayant Murthy, Maarten H. Versteeg, Jon P. Pineau, Kurt D. Retherford, Anne J. Verbiscer, Pontus C. Brandt, Kelsi N. Singer, S. Alan Stern   +19 more
doaj   +1 more source