Results 21 to 30 of about 2,568,324 (143)
On the structure of the turbulent interstellar atomic hydrogen [PDF]
Astronomy & Astrophysics, 2007 Aims. It is necessary to understand the dynamics of atomic gas to use complex modeling and to carry out detailed comparisons between theoretical models and observations. Methods. In a companion paper, we present high resolution bidimensional numerical simulations of the interstellar atomic hydrogen.
Hennebelle, Patrick +2 more
openaire +2 more sources
How to search for mirror stars with Gaia
Journal of High Energy Physics, 2022 We show for the first time how to conduct a direct search for dark matter using Gaia observations. Its public astrometric data may contain the signals of mirror stars, exotic compact objects made of atomic dark matter with a tiny kinetic mixing between ...
Aaron Howe +3 more
doaj +1 more source
Electronic spectroscopy of cold ions in a radio-frequency trap [PDF]
, 2010 The low density of ions in mass spectrometers generally precludes direct absorption measurements. The spectrum of ions can nonetheless be obtained by using resonance two-color photofragmentation or multiphoton photofragmentation techniques.
Rudnev, Vitaly S.
core +1 more source
Probing the Conditions for the H i-to-H2 Transition in the Interstellar Medium
The Astrophysical Journal, 2023 We investigate the conditions for the H i -to-H _2 transition in the solar neighborhood by analyzing H i emission and absorption measurements toward 58 Galactic lines of sight (LOSs) along with ^12 CO(1–0) (CO) and dust data. Based on the accurate column
Gyueun Park +11 more
doaj +1 more source
On the structure of the interstellar atomic gas
, 2007 to be published in the proceedings of the meeting on "Small Ionized and Neutral Structures in the Diffuse Interstellar Medium" (ASP Conference Series)
Hennebelle, P., Audit, E.
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H i Self-absorption toward the Cygnus X North: From Atomic Filament to Molecular Filament
The Astrophysical Journal Letters, 2023 Using the H i self-absorption data from the Five-hundred-meter Aperture Spherical radio Telescope, we perform a study of the cold atomic gas in the Cygnus X North region.
Chong Li +7 more
doaj +1 more source
Electronic spectroscopy of cold cations in a 22-pole trap by indirect methods [PDF]
, 2013 The confining capabilities of a 22-pole ion trap have been employed to mea- sure electronic spectra of cations of astrophysical relevance. The ion trap sits on the head of a closed cycle cryostat, enabling collisional cooling of the confined ions with
Chakrabarty, Satrajit
core +1 more source
Evidence for the Heating of Atomic Interstellar Gas by PAHs
, 2000 We report a strong correlation between the [CII] 158 micron cooling line and the mid-infrared flux in the 5-10 micron range in a wide variety of star-forming galaxies. The mid-infrared flux is dominated by Aromatic Feature Emission (AFE), which is thought to arise from large polycyclic aromatic hydrocarbon molecules or `PAHs' and generally associated ...
Helou, George +4 more
openaire +2 more sources
Electronic spectroscopy of open-chain and aromatic hydrocarbon cations in neon matrices [PDF]
, 2012 Considerable scientific interest has been devoted to the so-called diffuse interstellar bands (DIBs)—hundreds of absorption features of different strength and width, located in the visible and near infrared, and arising from the interstellar medium ...
Nagy, Adam
core +1 more source
Control of a two-dimensional electron gas on SrTiO3 (111) by atomic oxygen [PDF]
, 2014 This work was supported by Swiss National Science Foundation (200021-146995). P. D. C. K. was supported by the UK-EPSRC and the Royal Society and M. S. B. by Grant-in-Aid for Scientific Research (S) (No. 24224009) from the Ministry of Education, Culture,
McKeown Walker, S. +20 more
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