Results 51 to 60 of about 110,395 (224)

The Flattest Infrared Extinction Curve in Four Isolated Dense Molecular Cloud Cores

The Astrophysical Journal Letters
The extinction curve of interstellar dust in the dense molecular cloud cores is crucial for understanding dust properties, particularly size distribution and composition.
Jun Li, Bingqiu Chen, Biwei Jiang, He Zhao, Botao Jiang, Xi Chen   +5 more
doaj   +1 more source

Interstellar Extinction in the Direction of The Barnard 1 Dark Cloud in Perseus

Open Astronomy, 2003
Spectral and luminosity classes, absolute magnitudes, color excesses, interstellar extinctions and distances are determined for 98 stars down to 18 mag in the Barnard 1 dark cloud belonging to the Per OB2 association. The classification of stars is based
Černis K., Straižys V.
doaj   +1 more source

The interstellar cloud surrounding the Sun: a new perspective

, 2014
Aims: We offer a new, simpler picture of the local interstellar medium, made of a single continuous cloud enveloping the Sun. This new outlook enables the description of a diffuse cloud from within and brings to light some unexpected properties. Methods:
Gry, Cecile, Jenkins, Edward B.
core   +3 more sources

Recent developments and applications of selected ion flow tube mass spectrometry (SIFT‐MS)

Mass Spectrometry Reviews, Volume 44, Issue 2, Page 101-134, March/April 2025.
Abstract Selected ion flow tube mass spectrometry (SIFT‐MS) is now recognized as the most versatile analytical technique for the identification and quantification of trace gases down to the parts‐per‐trillion by volume, pptv, range. This statement is supported by the wide reach of its applications, from real‐time analysis, obviating sample collection ...
David Smith, Patrik Španěl, Nicholas Demarais, Vaughan S. Langford, Murray J. McEwan   +4 more
wiley   +1 more source

A modified theoretical Σ − D relation for supernova remnants: I. The case of constant temperature within the supernova remnant [PDF]

Serbian Astronomical Journal, 2003
We present a modification of the theoretical Σ − D relation for supernova remnants (SNRs) in the adiabatic expansion phase. This modification is based on the convolution of the relation first derived by Shklovsky with the Σ − D relation derived in this ...
Urošević Dejan V., Đurić N., Panuti T.   +2 more
doaj   +1 more source

Time-variability in the Interstellar Boundary Conditions of the Heliosphere: Effect of the Solar Journey on the Galactic Cosmic Ray Flux at Earth

, 2011
During the solar journey through galactic space, variations in the physical properties of the surrounding interstellar medium (ISM) modify the heliosphere and modulate the flux of galactic cosmic rays (GCR) at the surface of the Earth, with consequences ...
A. Yeghikyan, B. Wolff, B.E. Wood, C. Heiles, C.P. Sonett, D.M. Meyer, E. Möbius, G. Hebrard, G.P. Zank, H. Müller, H. Müller, H.-R. Müller, Hans-Reinhard Mueller, I.G. Usoskin, J. Goldston Peek, J. Kirkby, J.D. Slavin, J.T. Gosling, K.G. McCracken, K.G. McCracken, L.A. Fisk, M. Salvati, M. Wolleben, M.A.C. Perryman, N.V. Pogorelov, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, Priscilla C. Frisch, R. Lallement, R. Muscheler, R. Schönrich, R.A. Leske, R.A. Leske, R.A. Mewaldt, R.C. Bohlin, S. Redfield, S. Redfield, S. Redfield, S. Stanimirović, T.E. Holzer, U. Haud, V. Florinski, V. Florinski, W.R. Webber   +48 more
core   +1 more source

Advances on the Links Between Turbulent and Submeso‐ to Mesoscales During EUREC4A

Earth and Space Science, Volume 12, Issue 2, February 2025.
Abstract Turbulent processes in the atmospheric boundary layer (ABL) are parameterized in numerical weather prediction and climate models. Better understanding their modulation by larger‐scale organized structures, some of them being represented explicitly, is thus of great interest.
E. Gauvrit, M.‐N. Bouin, J.‐M. Delouis, F. Boulanger   +3 more
wiley   +1 more source

XMM‐Newton Observations of the Peculiar Be X‐Ray Binary A0538‐66

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT A0538‐66 is a neutron star/Be x‐ray binary located in the Large Magellanic Cloud and, since its discovery in the 70s, it showed a peculiar behavior that makes it a unique object in the high‐mass x‐ray binaries scene: the extremely eccentric orbit (e=0.72$$ e=0.72 $$), the short spin period of the neutron star (P=69$$ P=69 $$ ms), the episodes ...
Michela Rigoselli, Caterina Tresoldi, Lorenzo Ducci, Sandro Mereghetti   +3 more
wiley   +1 more source

Pulsar scintillation patterns and strangelets

, 2013
We propose that interstellar extreme scattering events, usually observed as pulsar scintillations, may be caused by a coherent agent rather than the usually assumed turbulence of $\rm H_2$ clouds.
Pen, Ue-Li, Perez-Garcia, M. Angeles, Silk, Joseph   +2 more
core   +2 more sources

Phenyl Radical Activates Molecular Hydrogen Through Protium and Deuterium Tunneling

Angewandte Chemie International Edition, Volume 63, Issue 51, December 16, 2024.
Activating the strong H2 bond is typically reserved for transition metals, and only a few main group systems can tackle this challenge. Here, we explore a phenyl radical mediated pathway utilizing the photolysis of iodobenzene. The phenyl radical leverages the high C−H bond energy of the forming benzene to drive H2 activation.
Virinder Bhagat, Jan Meisner, Jan Philipp Wagner   +2 more
wiley   +1 more source