Results 91 to 100 of about 944,715 (218)
H i Kinematics and the E(B − V)/N(H i) Ratio
The Astrophysical JournalThe λ 21 cm H i emission that is used to trace the gas-to-dust ratio at high Galactic latitudes has contributions from material beyond the Milky Way disk, with uncertain and likely subsolar metallicity and dust content.
Harvey Liszt
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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 Astrophysical JournalUnderstanding variations in the dust extinction curve is imperative for using dust as a tracer of local structure in the interstellar medium, understanding dust chemistry, and performing extinction corrections.
Andrew K. Saydjari, Gregory M. Green
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TWO PHOTON ABSORPTION BY MOLECULAR HYDROGEN AS A MECH ANISM FOR INTERSTELLAR EXTINCTION
, 1970 Author Institution: Electro-Optical SystemsA review is given of the theory of two-photon absorption with emphasis on selection rules, orders-of-magnitude of cross-sections and the concept of a ``two-photon absorption spectrum.
Duardo, J. A.
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Interstellar absorption across the electromagnetic spectrum
, 2004 We report results of a multi-wavelength study of interstellar absorption in diffuse molecular clouds that lie in the direction of flat-spectrum quasars.
Tappe, Achim,
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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 ...
openaire +1 more source
, 2014 Dust in the interstellar medium is important to astronomers because it absorbs light from more distant objects and because it provides the raw material from which planets form. One of the main components of interstellar dust is silicates.
Megan M. Bagley (10081498)
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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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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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