Results 101 to 110 of about 36,750 (220)

Chemistry of NH2CH2CH2OH and Its Related Species in the Interstellar Medium

The Astrophysical Journal Supplement Series
Ethanolamine (NH _2 CH _2 CH _2 OH) can form not only glycine directly under the conditions of proposed Archean alkaline hydrothermal vents, a possible environment for the origin of life, but also the polar hydrophilic head of phosphatidylethanolamine ...
Guoming Zhao, Mingwei He, Donghui Quan, Xue Yang, Long-Fei Chen, Dalei Li, Qiang Chang, Yuxuan Wu, Yanze Teng, Yisheng Qiu, Xinke He, Ming-Shuo Ma, Minglei Qu   +12 more
doaj   +1 more source

Abundances of Chemical Elements in Open Star Clusters as Indicators of their Nature

Open Astronomy, 2015
Applying a compilled catalog, we find that the relative abundances of α-elements in open clusters and in field stars of the thin disk of the Galaxy show different dependencies on metallicity, age and parameters of their Galactic orbits.
Marsakov V. A., Gozha M. L., Koval’ V. V., Shpigel’ L. V.   +3 more
doaj   +1 more source

The 4He1H ratios in the chemical compositions of solar flare particles and the primordial solar nebula [PDF]

The chemical abundances of solar flare particles are similar to those of galactic cosmic rays at their sources. In order to infer the 4He/1H ratio in the solar atmosphere, this ratio as observed in the interstellar gases was considered in addition to ...
Sakurai, K.
core   +1 more source

ISM enrichment and local pollution in dwarf galaxies

, 2010
The fate of metals after they are released in starburst episodes is still unclear. What phases of the interstellar medium are involved, in which timescales?
Aloisi, Aloisi, Aloisi, Asplund, Bowen, Brinchmann, Cannon, Cen, D. Kunth, Doublier, Désert, Désert, Fraternali, Heckman, Hirashita, Hopp, Hunt, Izotov, Jenkins, Jenkins, Kunth, Kunth, Kunth, Lanz, Lanz, Lebouteiller, Lebouteiller, Lebouteiller, Lebouteiller, Lecavelier des Etangs, Lisenfeld, López-Sánchez, Meynet, Moos, Papaderos, Pettini, Recchi, Robert, Rodríguez, Savage, Sofia, Sofia, Telfer, Thuan, Thuan, Thuan, V. Lebouteiller, Valls-Gabaud, Vanzi, Walsh, Walsh, Walsh, Östlin   +52 more
core   +3 more sources

The Homogeneity of Interstellar Oxygen in the Galactic Disk

, 2004
We present an analysis of high resolution HST Space Telescope Imaging Spectrograph (STIS) observations of O I 1356 and H I Lyman-alpha absorption in 36 sight lines that probe a variety of Galactic disk environments and include paths that range over ...
Brown A. G. A., David M. Meyer, Hamdy M. A., J. T. Lauroesch, Jones A. P., Keenan F. P., Kohoutek L., Mar D. P., Mermilliod J.-C., Ossenkopf V., Raboud D., Stefan I. B. Cartledge, Sudzius J., Tobin W., U. J. Sofia, Westin T. N. G., Westin T. N. G.   +16 more
core   +1 more source

Interstellar abundances toward zeta Ophiuchi

The Astrophysical Journal, 1974
Extensive Copernicus observations of interstellar absorption lines in front of zeta Oph have been combined with similar ground-based data to give column densities or limits on 26 elements in H I clouds. Compared with solar-system abundances, there is a depletion of most elements relative to hydrogen, except S and Zn, by factors of 3 to 4000.
openaire   +1 more source

Interstellar Migration, the Population ‘Problem’ and the Climate Emergency

Critical Quarterly, Volume 68, Issue 1, Page 103-119, April 2026.
Anna Hartnell
wiley   +1 more source

The Case of H$_2$C$_3$O Isomers, Revisited: Solving the Mystery of the Missing Propadienone

, 2019
To date, two isomers of H$_2$C$_3$O have been detected, namely, propynal (HCCCHO) and cylclopropenone (c-H$_2$C$_3$O). A third, propadienone (CH$_2$CCO), has thus far eluded observers despite the fact that it is the lowest in energy of the three.
Korn, Viktoria H., Kästner, Johannes, Shingledecker, Christopher N., Álvarez-Barcia, Sonia   +3 more
core   +1 more source

Rapid Chemical Enrichment by Intermittent Star Formation in GN-z11

The Astrophysical Journal Letters
We interpret the peculiar supersolar nitrogen abundance recently reported by the James Webb Space Telescope observations for GN-z11 ( z = 10.6) using our state-of-the-art chemical evolution models.
Chiaki Kobayashi, Andrea Ferrara
doaj   +1 more source

Isotope abundances in interstellar molecular clouds

The Astrophysical Journal, 1976
The J=1..-->..J=0 transition of carbon monoxide is used to study the abundance ratios of carbon and oxygen isotopes in dense molecular clouds. Very high-quality spectra were obtained of /sup 12/C/sup 16/O (CO), /sup 13/C/sup 16/C(/sup 13/CO), and /sup 12/C/sup 18/O(C/sup 18/O) in 14 regions distributed throughout the galactic plane.
P. G. Wannier, A. A. Penzias, R. A. Linke, R. W. Wilson   +3 more
openaire   +1 more source