Results 41 to 50 of about 49,075 (253)
REVISITING THE CHLORINE ABUNDANCE IN DIFFUSE INTERSTELLAR CLOUDS FROM MEASUREMENTS WITH THE COPERNICUS SATELLITE [PDF]
, 2011 We reanalyzed interstellar Cl i and Cl ii spectra acquired with the Copernicus satellite. The directions for this study come from those of Crenny & Federman and sample the transition from atomic to molecular-rich clouds where the unique chemistry leading
Daniel Moomey +3 more
semanticscholar +1 more source
Interstellar Bow Shocks around Fast Stars Passing through the Local Interstellar Medium
The Astrophysical Journal, 2023 Bow shocks are produced in the local interstellar medium by the passage of fast stars from the Galactic thin-disk and thick-disk populations with velocities V _* = 40–80 km s ^−1 .
J. Michael Shull, S. R. Kulkarni
doaj +1 more source
Abundances in Diffuse Interstellar Clouds [PDF]
Highlights of Astronomy, 1980 Interstellar clouds are concentrations of cold (T ≲ 100 K) neutral gas (cf. Spitzer 1978) which are immersed within an intercloud medium. It is worthwhile to distinguish between diffuse clouds (roughly those with E[B-V] ≳ 0.5) and dark clouds (those with E[B-V] ≳ 0.5). This distinction is useful in the sense that diffuse clouds are relatively warm (T ∼
openaire +1 more source
Observations of Multiphase, High-velocity, Shocked Gas in the Vela Supernova Remnant
The 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
A search for naphthalene in diffuse interstellar clouds [PDF]
, 2011 We have obtained high-resolution optical spectroscopy of 10 reddened O-type stars with Ultraviolet and Visual Echelle Spectrograph at Very Large Telescope to search for interstellar bands of the naphthalene cation (C10H8+) in the intervening clouds.
S. Iglesias-Groth +2 more
semanticscholar +1 more source
Shocks and Molecules in Diffuse Interstellar Cloud Pairs [PDF]
The Astrophysical Journal, 2021 Abstract The diffuse interstellar medium (ISM) is dynamic, and its chemistry and evolution are determined by shock fronts as well as photodissociation. Shocks are implied by the supersonic motions and velocity dispersion, often statistically called “turbulence”.
William T. Reach, Carl Heiles
openaire +2 more sources
A Herschel [C II] Galactic plane survey II: CO-dark H2 in clouds [PDF]
, 2014 ABRIDGED: Context: HI and CO large scale surveys of the Milky Way trace the diffuse atomic clouds and the dense shielded regions of molecular hydrogen clouds.
Goldsmith, P. F. +4 more
core +1 more source
Far-ultraviolet Dust Extinction and Molecular Hydrogen in the Diffuse Milky Way Interstellar Medium
The Astrophysical Journal, 2023 We aim to compare variations in the full-UV dust extinction curve (912–3000 Å), with the H i /H _2 /total H content along diffuse Milky Way sightlines, to investigate possible connections between ISM conditions and dust properties. We combine an existing
Dries Van De Putte +4 more
doaj +1 more source
The Turbulent Interstellar Medium [PDF]
, 2006 An overview is presented of the main properties of the interstellar medium. Evidence is summarized that the interstellar medium is highly turbulent, driven on different length scales by various energetic processes.
Andreas Burkert +73 more
core +3 more sources
INVESTIGATION OF DIFFUSE INTERSTELLAR BANDS OF ORGANIC MOLECULES IN THE SPECTRA OF CEPHEID STARS
Odessa Astronomical Publications, 2016 We describe an effective method of investigation of the Diffuse Interstellar Bands (DIBs) in the spectra of Cepheid stars. DIBs are believed to originate from the absorption of such carriers as polycyclic aromatic hydrocarbons in the interstellar gaseous
S. V. Kashuba +5 more
doaj +1 more source