Results 21 to 30 of about 136,681 (287)

Interstellar dust along the line of sight of GX 3+1 [PDF]

open access: yesAstronomy & Astrophysics, 2019
Context.Studying absorption and scattering of X-ray radiation by interstellar dust grains allows us to access the physical and chemical properties of cosmic grains even in the densest regions of the Galaxy.Aims.We aim at characterising the dust silicate ...
D. Rogantini   +11 more
semanticscholar   +1 more source

The warm-hot circumgalactic medium around EAGLE-simulation galaxies and its detection prospects with X-ray and UV line absorption

open access: yesMonthly notices of the Royal Astronomical Society, 2020
We use the EAGLE (Evolution and Assembly of GaLaxies and their Environments) cosmological simulation to study the distribution of baryons, and far-ultraviolet (O vi), extreme-ultraviolet (Ne viii), and X-ray (O vii, O viii, Ne ix, and Fe xvii) line ...
N. Wijers, J. Schaye, B. Oppenheimer
semanticscholar   +1 more source

Observations of Multiphase, High-velocity, Shocked Gas in the Vela Supernova Remnant

open access: yesThe Astrophysical Journal, 2023
We present an analysis of high-resolution far-UV archival spectra obtained with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope of the star HD 75309, which probes high-velocity shocked gas in the Vela supernova remnant (SNR).
Adam M. Ritchey
doaj   +1 more source

CO TO H2 RATIO OF INTERSTELLAR MOLECULAR CLOUDS IN THE DIRECTIONS OF EARLY TYPE STARS [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2004
We present measurements of interstellar CO absorption lines in the spectra of 7 early-type stars that were observed with the FUSE(Far Ultraviolet Spectroscopic Explorer).
Jae-Woo Park   +2 more
doaj   +1 more source

The Mean Absorption-line Spectra of a Selection of Luminous z ∼ 6 Lyman Break Galaxies [PDF]

open access: yesAstrophysical Journal, 2020
We examine the absorption-line spectra of a sample of 31 luminous ( ) Lyman break galaxies at redshift z ≃ 6 using data taken with the FOCAS and OSIRIS spectrographs on the Subaru and GTC telescopes.
Y. Harikane   +3 more
semanticscholar   +1 more source

Shaken or Stirred: The Diffuse Interstellar Medium with Exceptionally High SiO Abundance

open access: yesThe Astrophysical Journal, 2023
Interstellar shocks, a key element of stellar feedback processes, shape the structure of the interstellar medium (ISM) and are essential for the chemistry, thermodynamics, and kinematics of interstellar gas.
Daniel R. Rybarczyk   +2 more
doaj   +1 more source

High‐Pressure Carbonaceous Phases as Minerals

open access: yesGeophysical Monograph Series, Page 11-23., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Oliver Tschauner
wiley  

+1 more source

Synthetic Observations of 21 cm H i Line Profiles from Inhomogeneous Turbulent Interstellar H i Gas with Magnetic Fields [PDF]

open access: yesAstrophysical Journal, 2017
We carried out synthetic observations of interstellar atomic hydrogen at 21 cm wavelength by utilizing the magnetohydrodynamic numerical simulations of the inhomogeneous turbulent interstellar medium.
Y. Fukui   +7 more
semanticscholar   +1 more source

New and Improved Lyα Reconstructions for M and K Dwarfs

open access: yesThe Astrophysical Journal, 2023
The Ly α emission line is the brightest UV emission line in M and K dwarf spectra and serves as an important tool for studies of stellar chromospheres, the interstellar medium, and exoplanet atmospheres.
Angeli Sandoval   +3 more
doaj   +1 more source

δ Orionis: Further temporal variability and evidence for small-scale structure in the interstellar medium [PDF]

open access: yes, 2001
We report here the detection of both spatial and temporal variations in interstellar absorption in the line of sight to δ Orionis. First, we present new high-resolution (R≈110 000) observations of the interstellar D lines of Na i towards both δ Ori A and
Crawford, IA, Howarth, ID, Price, RJ
core   +1 more source

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