Results 91 to 100 of about 156,409 (216)
Carbon Isotope Fractionation of Complex Organic Molecules in Star-forming Cores
The Astrophysical JournalRecent high-resolution and sensitivity Atacama Large Millimeter/submillimeter Array observations have unveiled the carbon isotope ratios ( ^12 C/ ^13 C) of complex organic molecules (COMs) in a low-mass protostellar source. To understand the ^12 C/ ^13 C
Ryota Ichimura +2 more
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, 2017 In this paper we present calculated fractional abundances in dense interstellar clouds for selected atomic and molecular species using three different homogeneous, pseudo-time-dependent models discussed by Bettens, Lee, & Herbst (1995): the new ...
R. P.A. Bettens, E. Herbst, H.-H. Lee
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Simulating supernova feedback in galaxy disks [PDF]
, 2012 In this thesis I examine supernova feedback in hydrodynamical simulations of galaxy disks. Understanding this process entails the numerical evaluation of cooling in radiative shocks, and we present a set of simulations using two widely used numerical ...
CREASEY, PETER,EDWARD +1 more
core
Chemistry of NH2CH2CH2OH and Its Related Species in the Interstellar Medium
The Astrophysical Journal Supplement SeriesEthanolamine (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 +12 more
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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. +3 more
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Interstellar abundances of oxygen and nitrogen
The Astrophysical Journal, 1983 Neutral nitrogen and oxygen column densities or limits are derived for 53 path lengths through the diffuse interstellar medium and compared with column densities of neutral hydrogen. For neither N nor O is a systematic increase of depletion found as reddening increases.
D. G. York +6 more
openaire +1 more source
Combining magnetic and electric sails for interstellar deceleration
, 2016 International audienceThe main benefit of an interstellar mission is to carry out in-situ measurements within a target star system. To allow for extended in-situ measurements, the spacecraft needs to be decelerated.
Hein, Andreas Makoto, Perakis, Nikolaos
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Are Stars Really Ingesting Their Planets? Examining an Alternative Explanation
The Astrophysical JournalNumerous stars exhibit surprisingly large variations in their refractory element abundances, often interpreted as signatures of planetary ingestion events.
Nadine H. Soliman, Philip F. Hopkins
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, 2004 In this Letter we report on our study of the filtration of interstellar atoms of hydrogen, oxygen and nitrogen in the interaction region between the solar wind and the local interstellar medium.
V. Izmodenov +3 more
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Rapid Chemical Enrichment by Intermittent Star Formation in GN-z11
The Astrophysical Journal LettersWe 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
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