Results 81 to 90 of about 944,715 (218)

A Definitive Determination of the Interstellar Carbon Abundance toward ρ Ophiuchi A and B

The Astrophysical Journal Letters
We present the results of an effort to derive interstellar gas-phase C ii abundances along the lines of sight toward ρ  Oph A and B. Our analysis is based on high-resolution near-ultraviolet and far-ultraviolet archival spectra acquired with the Space ...
Adam M. Ritchey, S. R. Federman, Daniel E. Welty, Adolf N. Witt   +3 more
doaj   +1 more source

Interstellar Meteoroids [PDF]

, 2019
The conclusive detection of interstellar meteoroids would be of great significance, providing unique information about the interstellar medium and even about the debris disks of other stars.
Hajduková, Mária, Sterken, Veerle, Wiegert, Paul   +2 more
core   +1 more source

A survey of ultraviolet interstellar absorption lines

The Astrophysical Journal Supplement Series, 1983
A telescope-spectrometer on the Copernicus spacecraft made possible the measurement of many ultraviolet absorption lines produced by the interstellar gas. The present survey provides data on ultraviolet absorption lines in the spectra of 88 early-type stars.
R. C. Bohlin, E. B. Jenkins, L., Jr. Spitzer, D. G. York, J. K. Hill, B. D. Savage, T. P., Jr. Snow   +6 more
openaire   +1 more source

The 3.4 µm absorption band profile : comparison of aliphatic interstellar dust observations and laboratory analogues properties

, 2022
National audienceCarbonaceous dust in the diffuse interstellar medium (ISM) is widely observed through infrared absorption bands related to C-H vibration in aliphatic groups. The main absorption signatures around 3.4 μm (-CH3 and –CH2- stretching modes)
Godard, Marie, Dartois, Emmanuel
core  

The Local Group L-band Survey: The First Measurements of Localized Cold Neutral Medium Properties in the Low-metallicity Dwarf Galaxy NGC 6822

The Astrophysical Journal
Measuring the properties of the cold neutral medium (CNM) in low-metallicity galaxies provides insights into heating and cooling mechanisms in early Universe-like environments.
Nickolas M. Pingel, Hongxing Chen, Snežana Stanimirović, Eric W. Koch, Adam K. Leroy, Erik Rosolowsky, Chang-Goo Kim, Julianne J. Dalcanton, Fabian Walter, Michael P. Busch, Ryan Chown, Jennifer Donovan Meyer, Cosima Eibensteiner, Deidre A. Hunter, Sumit K. Sarbadhicary, Elizabeth Tarantino, Vicente Villanueva, Thomas G. Williams   +17 more
doaj   +1 more source

The density distribution and 58.4 nm radiation intensity of interstellar helium in the heliosphere: a model simulation

Earth and Planetary Physics
Research on the interstellar medium and its interaction with the solar system constitutes a significant topic in planetary physics. As the Sun traverses the local interstellar cloud, interstellar neutrals penetrate the heliosphere, forming the ...
JiaLing Lyu, ChongJing Yuan, Fei He, BeiLi Ying   +3 more
doaj   +1 more source

Ne and Fe Abundances in the Interstellar Medium: Archival Study of Fe-L and Ne-K Edges in Chandra and XMM-Newton

The Astrophysical Journal
The abundance of elements in the interstellar medium is a key facet for many fields of astrophysical study. In the soft X-ray spectra, absorption by interstellar gas can result in deep absorption features that affect continuum measurements. In this paper,
D. L. Moutard, L. R. Corrales, I. Psaradaki, E. Temple, M. Shi   +4 more
doaj   +1 more source

Strong and selective isotope effect in the vacuum ultraviolet photodissociation branching ratios of carbon monoxide

Nature Communications, 2019
Carbon monoxide is the main C and O reservoir in interstellar media, where it undergoes photochemistry. The authors show that isotopic substitution affects not only its absorption. spectrum and photodissociation rates but also the branching ratio, key to
Pan Jiang, Xiaoping Chi, Qihe Zhu, Min Cheng, Hong Gao   +4 more
doaj   +1 more source

3 Interstellar Ram Jets

, 2016
Published in Proceedings of TVIW 2016, February 28-March 2, Chattanooga, TN / David E. Fields and Abby SherriffThe mass ratio problem in interstellar flight presents a major problem.
Jackson, Albert Allen
core  

Ion irradiation of carbonaceous interstellar analogues: Effects of cosmic rays on the 3.4 μ m interstellar absorption band

, 2011
No commentInternational audienceContext. A 3.4 μm absorption band (around 2900 cm-1), assigned to aliphatic C-H stretching modes of hydrogenated amorphous carbons (a-C:H), is widely observed in the diffuse interstellar medium, but disappears or is ...
Féraud, G., Y. Carpentier, d'Hendecourt, L., C. Engrand, M. Chabot, E. Dartois, Bréchignac, P., L. d’Hendecourt, Dartois, E., Brunetto, R., Engrand, C., R. Brunetto, Duprat, J., G. Féraud, M. Godard, P. Bréchignac, D’hendecourt, L., T. Pino, Godard, M., J. Duprat, Carpentier, Y., Pino, T., Chabot, M.   +22 more
core   +1 more source