Results 101 to 110 of about 1,003,872 (220)
The first glimpse of a water ice absorption map in the Milky Way
Astronomy & AstrophysicsInterstellar ice plays a key role in the thermal evolution of the interstellar medium and in astrochemical pathways, yet its large-scale distribution remains poorly constrained. We use the Wide-field Infrared Survey Explorer (WISE) and the Two Micron All
Cao Zhetai, Jiang Biwei, Meingast Stefan
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Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2011 We present a model for interstellar extinction dust, in which we assume a bimodal distribution of extinction carriers, a dispersion of core-mantle grains, supplemented by a collection of PAHs in free molecular form.
C. Cecchi-Pestellini +7 more
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The Astronomical JournalCold neutral hydrogen (H i ) is a crucial precursor for molecular gas formation and can be studied via H i absorption. This study investigates H i absorption in low column density regions of the Small and Large Magellanic Clouds (SMC and LMC) using the ...
Hongxing Chen +20 more
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Interstellar absorption toward HD 14633
The Astrophysical Journal, 1983 Observations are reported of optical interstellar absorption lines of Ti II, Ca II, and Na I in the spectrum of HD 14633, a probable runaway O star ejected from the Perseus spiral arm. Unusually high gas-phase abundances of the normally depleted elements Ca and Ti are found in three high-velocity interstellar line components; the light paths to only a ...
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Diffuse interstellar bands towards ο Per and ξ Per [PDF]
, 2012 Spectroscopic characteristics of interstellar matter vary strongly with the direction to the target star. Spectra of oPer and ξ Per contain many prominent and weak diffuse interstellar bands as well as absorption lines of some identiffed interstellar ...
Debudej, A. +3 more
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The Astrophysical Journal“PeVatrons” refer to astrophysical sources capable of accelerating particles to energies around 10 ^15 electron volts and higher, potentially contributing to the cosmic-ray spectrum in the knee region.
Jianli Zhang, YiQing Guo
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Photochemistry of interstellar molecules [PDF]
, 1971 The photochemistry of two diatomic and eight polyatomic molecules is discussed quantitatively. For an interstellar molecule, the lifetime against photodecomposition depends upon the absorption cross section, the quantum yield or probability of ...
Stief, L. J.
core
The Astrophysical JournalWe assess the impact of Ca ii λ λ 3934, 3969 and Na i λ λ 5891, 5897 absorption arising in the interstellar medium (ISM) on the Sloan Digital Sky Survey-IV MaNGA Stellar Library (MaStar) and produce corrected spectroscopy for 80% of the 24,162-star ...
Kate H. R. Rubin +8 more
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INTERSTELLAR H$_{2}$ NARROW AND DIFFUSE LINE ABSORPTION
, 1974 $^{1}$ J. A. Duardo, ``An Interpretation, of the Diffuse Interstellar Absorption Lines in Terms of Dipole Transitions of $H_{2}$'', Twenty-Sixth Symposium on Molecular Structure and Spectroscopy, The Ohio State University, June 1971.Author Institution ...
Duardo, J. A.
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On the long-wavelength absorption by interstellar dust
The Astrophysical Journal, 1991 Two proposed modifications to the standard theory for the long-wavelength absorption by interstellar dust grains are shown to be incorrect. The Mie theory for spheres or cylinders, or the discrete dipole approximation for irregular shapes, are based on Maxwell's equations for the electromagnetic field and should be used instead of the modified formula ...
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