Results 31 to 40 of about 36,750 (220)

The abundance of interstellar OD

The Astrophysical Journal, 1985
We present the chemistry of OD and estimate the abundance of OD in diffuse and dense molecular clouds. We predict substantial enhancements in the abundance of OD relative to OH and argue that density ratios of 0.01 or greater are likely in many clouds. A search could add OD to the list of known interstellar molecules.
K. Croswell, A. Dalgarno
openaire   +1 more source

Dust in the Local Interstellar Wind [PDF]

, 1999
The gas-to-dust mass ratios found for interstellar dust within the Solar System, versus values determined astronomically for the cloud around the Solar System, suggest that large and small interstellar grains have separate histories, and that large ...
Dorschner, J. M., Frisch, P. C., Geiss, J., Greenberg, J. M., Grün, E., Hoppe, P., Jones, A. P., Krätschmer, W., Landgraf, M., Linde, T. J., Morfill, G. E., Reach, W. T., Slavin, J. D., Svestka, J., Witt, A. N., Zank, G. P.   +15 more
core   +2 more sources

The Astrodust+PAH Model: A Unified Description of the Extinction, Emission, and Polarization from Dust in the Diffuse Interstellar Medium

The Astrophysical Journal, 2023
We present a new model of interstellar dust in which large grains are a single composite material, “astrodust,” and nanoparticle-sized grains come in distinct varieties including polycyclic aromatic hydrocarbons (PAHs). We argue that a single-composition
Brandon S. Hensley, B. T. Draine
doaj   +1 more source

The Interaction Between Accretion from the Interstellar Medium and Accretion from the Evolved Binary Component in Barium Stars [PDF]

Journal of Astronomy and Space Sciences, 2018
The reanalysis of the previously published abundance pattern of mild barium star HD202109 (ζ Cyg) and the chemical compositions of 129 thin disk barium stars facilitated the search for possible correlations of different stellar parameters with second ...
Yeuncheol Jeong, Alexander V. Yushchenko, Dmytry N. Doikov   +2 more
doaj   +1 more source

Depletion patterns and dust evolution in the ISM [PDF]

, 1999
We review the use of elemental depletions in determining the composition of interstellar dust and present a new interpretation of the elemental depletion patterns for the dust forming elements in a range of diffuse cloud types. We discuss this within the
Jones, A. P.
core   +3 more sources

The Abundance of Interstellar Nitrogen

The Astrophysical Journal, 1997
14 pages, LaTeX, 2 Postscript figures; ApJ Letters, in ...
Meyer, David M., Cardelli, Jason A., Sofia, Ulysses J.   +2 more
openaire   +2 more sources

Hydro-chemical study of the evolution of interstellar pre-biotic molecules during the collapse of molecular clouds

, 2012
One of the stumbling blocks for studying the evolution of interstellar molecules is the lack of adequate knowledge of the rate co-efficients of various reactions which take place in the Interstellar medium and molecular clouds.
Ankan Das, Boogert, Chakrabarti, Chakrabarti, Chakrabarti, Cuppen, Das, Fuente, Gibb, Guelin, Ioppolo, Kuan, Liton Majumdar, Sandip K. Chakrabarti, Snyder, Sonali Chakrabarti, Woon   +16 more
core   +1 more source

Interstellar polarization and grain alignment: the role of iron and silicon

, 2012
We compiled the polarimetric data for a sample of lines of sight with known abundances of Mg, Si, and Fe. We correlated the degree of interstellar polarization $P$ and polarization efficiency (the ratio of $P$ to the colour excess $E(B-V)$ or extinction $
Abbas, Andersson, Andersson, Andersson, Andersson, Asplund, Belley, Das, Davis, Djouadi, Draine, Draine, Duley, Efimov, Elias, Fitzpatrick, Ghosh, H. K. Das, Harries, Heiles, Il’in, Jones, Kim, Kimura, Kimura, Kocifaj, Krauß, Larson, Lazarian, Lazarian, Leroy, M. S. Prokopjeva, Marraco, Martin, Mathis, Matsumura, McDavid, Michel, Min, Molster, N. V. Voshchinnikov, Niyogi, Oudmaijer, Patriarchi, Poeckert, Purcell, Roche, Serkowski, Sorrell, Sorrell, Sturm, Th. Henning, Valencic, van Breemen, Vega, Vink, Voshchinnikov, Voshchinnikov, Voshchinnikov, Voshchinnikov, Wegner, Wegner, Weingartner, Weitenbeck, Whittet, Whittet   +65 more
core   +1 more source

IMAPS Observations of Interstellar Neutral Argon and the Implications for Partially Ionized Gas [PDF]

, 1997
We use the absorption features from neutral argon at 1048 and 1066 A to determine interstellar abundances or their lower limits toward nine early-type stars. These features were observed with the Interstellar Medium Absorption Profile Spectrograph (IMAPS)
Ajello J. M., Aldrovandi S. M. V., Bloch J. J., Duley W. W., Edward B. Jenkins, Eiroa C., Fahr H. J., Geiss J., Gillett F. C., Gry C., Hedin A. E., Hibbert A., Lallement R., Mathis J. S., Meyer D. M., Quemerais E., Shull J. M., Smith R. G., Ulysses J. Sofia, Verner D. A., Whittet D. C. B.   +20 more
core   +3 more sources

Accelerated Discovery‐to‐Unveiling of High‐Performance and Affordable Ammonia Electrode Process by Human–Machine Collaboration Framework

Angewandte Chemie International Edition, EarlyView.
By employing dimensionally reduced reaction descriptors, a human–machine collaboration framework for efficient electrochemical nitrate reduction to NH3 electrocatalysts screening is established and drastically shorten the discovery timeframe. A new kinetic model is established in combination with a rotating ring‐disk electrode, unveiling the pivotal ...
Yingying Cheng, Masaki Takeguchi, Abraham Castro Garcia, Ken Sakaushi   +3 more
wiley   +1 more source