Results 61 to 70 of about 104,360 (261)

Mapping the interstellar medium in galaxies with Herschel/SPIRE [PDF]

, 2010
The standard method of mapping the interstellar medium in a galaxy, by observing the molecular gas in the CO 1-0 line and the atomic gas in the 21-cm line, is largely limited with current telescopes to galaxies in the nearby universe.
Bock, J. J., Bradford, M., Eales, S. A., Levenson, L. R., Schulz, B.   +4 more
core  

Resolving the Interstellar Medium at the Peak of Cosmic Star Formation

, 2018
The interstellar medium feeds both the formation of stars and the growth of black holes, making it a key ingredient in the evolution of galaxies.
Hodge, Jacqueline, Rivera, Gabriela Calistro   +1 more
core   +1 more source

Equation of motion of an interstellar Bussard ramjet with radiation and mass losses

, 2007
An interstellar Bussard ramjet is a spaceship using the protons of the interstellar medium in a fusion engine to produce thrust. In recent papers, it was shown that the relativistic equation of motion of an ideal ramjet and of a ramjet with radiation ...
Abramowitz, Bernard Silvestre-Brac, Bussard, Claude Semay, Fishback, Mallove, Marx, Matloff, Nahin, Sears, Semay, Semay   +11 more
core   +5 more sources

Asuka 12236 more primitive than Paris: Clues given by their Infrared and Raman micro‐spectroscopy signatures

Meteoritics &Planetary Science, EarlyView.
Abstract Carbonaceous chondrites are meteorites originating from undifferentiated objects of the Solar System, which may retain signatures of primitive matter. Here, we present a comparative study between two CM chondrites Asuka 12236 and Paris, both considered among the most primitive in the carbonaceous chondrite meteorite collection.
Zahia Djouadi, Vassilissa Vinogradoff, Zelia Dionnet, Coline Serra, Douchka Dimitrijevic, Alexandra Malnuit, Cateline Lantz, Philippe Claeys, Steven Goderis, Louis Le Sergeant d'Hendecourt   +9 more
wiley   +1 more source

Measurement of Interstellar Magnetization by Synchrotron Polarization Variance

The Astrophysical Journal
Since synchrotron polarization fluctuations are related to the fundamental properties of the magnetic field, we propose the polarization intensity variance to measure the Galactic interstellar medium (ISM) magnetization.
Ning-Ning Guo, Jian-Fu Zhang, Hua-Ping Xiao, Jungyeon Cho, Xue-Juan Yang   +4 more
doaj   +1 more source

Benchmark Studies on the Isomerization Enthalpies for Interstellar Molecular Species

Journal of Nigerian Society of Physical Sciences, 2023
With the well-established correlation between the relative stabilities of isomers and their interstellar abundances coupled with the prevalence of isomeric species among the interstellar molecular species, isomerization remains a plausible formation ...
Emmanuel Etim (PhD)
doaj   +1 more source

Expected value, to a point: Moral decision‐making under background uncertainty

Noûs, EarlyView.
Abstract Expected value maximization gives plausible guidance for moral decision‐making under uncertainty in many situations. But it has unappetizing implications in ‘Pascalian’ situations involving tiny probabilities of extreme outcomes. This paper shows, first, that under realistic levels of ‘background uncertainty’ about sources of value independent
Christian Tarsney
wiley   +1 more source

Positron transport in the interstellar medium [PDF]

Astronomy & Astrophysics, 2009
We seek to understand the propagation mechanisms of positrons in the interstellar medium (ISM). This understanding is a key to determine whether the spatial distribution of the annihilation emission observed in our Galaxy reflects the spatial distribution of positron sources and, therefore, makes it possible to place constraints on the origin of ...
K. Ferrière, P. Jean, Alexandre Marcowith, W. Gillard, W. Gillard, W. Gillard   +5 more
openaire   +4 more sources

Revealing the Spectral Properties of Magnetic Turbulence by Synchrotron Polarization Gradients

The Astrophysical Journal
Based on the modern understanding of MHD turbulence theory, we propose a new method for measuring the spectral properties of magnetic turbulence by synchrotron polarization gradient analysis.
Jian-Fu Zhang, Zi-Qi Liu
doaj   +1 more source

Visionaries and Crackpots, Maniacs and Saints: Existential Risk and the Politics of Longtermism

Ratio, EarlyView.
ABSTRACT Despite advancing strong claims about our collective priorities, longtermism has received little attention in debates in political philosophy. I first provide an account of longtermism that highlights the way it departs from established work on intergenerational justice.
Alex McLaughlin
wiley   +1 more source