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Earth's Mesosphere During Possible Encounters With Massive Interstellar Clouds 2 and 7 Million Years Ago

open access: yesGeophysical Research Letters
Our solar system's path has recently been shown to potentially intersect dense interstellar clouds 2 and 7 million years ago: the Local Lynx of Cold Cloud and the edge of the Local Bubble.
Jesse A. Miller   +4 more
doaj   +2 more sources

Dust evolution, a global view I. Nanoparticles, nascence, nitrogen and natural selection … joining the dots [PDF]

open access: yesRoyal Society Open Science, 2016
The role and importance of nanoparticles for interstellar chemistry and beyond is explored within the framework of The Heterogeneous dust Evolution Model for Interstellar Solids (THEMIS), focusing on their active surface chemistry, the effects of ...
A. P. Jones
doaj   +1 more source

Presumed Detection of C5 Molecule in the Interstellar Medium

open access: yesThe Astrophysical Journal, 2022
The paper suggests the presence of the carbon chain C _5 molecule in translucent, interstellar H i clouds. This species, the only five atom interstellar molecule, observable in dark, translucent clouds, seems to be observable in reasonably dense clouds ...
J. Krełowski, R. Hakalla, W. Szajna
doaj   +1 more source

Molecular Clouds in the Galactic Plane from l = [59.°75, 74.°75] and b = [−5.°25, +5.°25]

open access: yesThe Astrophysical Journal Supplement Series, 2023
In this paper we present the distribution of molecular gas in the Milky Way Galactic plane from l = [59.75, 74.75]° and b = [−5.25, +5.25]°, using the MWISP ^12 CO/ ^13 CO/C ^18 O emission-line data.
Chunxue Li   +8 more
doaj   +1 more source

Neutral Atomic and Molecular Clouds and Star Formation in the Outer Carina Arm

open access: yesThe Astrophysical Journal, 2023
We present a comprehensive investigation of H i (super)clouds, molecular clouds (MCs), and star formation in the Carina spiral arm of the outer Galaxy.
Geumsook Park   +3 more
doaj   +1 more source

A Search for OH 18 cm Emission from Intermediate-velocity Gas at High Galactic Latitudes

open access: yesThe Astrophysical Journal, 2023
We present search results of 22 high-latitude (∣ b ∣ > 25°) sightlines for OH 18 cm emission using the 305 m radio telescope at the Arecibo Observatory. These sightlines appear in neutral hydrogen emission at intermediate velocities −90 ≤ V _LSR ≤ −20 km
Allison J. Smith, D. Anish Roshi
doaj   +1 more source

Creating a new paradigm for the local interstellar medium–A perspective

open access: yesFrontiers in Astronomy and Space Sciences, 2023
The interstellar medium close to the Sun called the local ISM (LISM) provides critical insights into physical processes and phenomena in the more distant interstellar medium in our Galaxy without the confusion of many complex structures in the sight ...
Jeffrey L. Linsky, Seth Redfield
doaj   +1 more source

Dissociative Recombination of Rotationally Cold OH+ and Its Implications for the Cosmic Ray Ionization Rate in Diffuse Clouds

open access: yesThe Astrophysical Journal Letters, 2023
Observations of OH ^+ are used to infer the interstellar cosmic ray ionization rate in diffuse atomic clouds, thereby constraining the propagation of cosmic rays through and the shielding by interstellar clouds, as well as the low energy cosmic ray ...
Ábel Kálosi   +14 more
doaj   +1 more source

The Distance to High-velocity Cloud Complex M

open access: yesThe Astrophysical Journal, 2023
λ -21 cm HI4PI survey data are used to study the anomalous-velocity hydrogen gas associated with high-velocity cloud Complex M. These high-sensitivity, high-resolution, high-dynamic-range data show that many of the individual features, including MI, MIIa,
G. L. Verschuur, J. T. Schmelz
doaj   +1 more source

The Role of Terahertz and Far-IR Spectroscopy in Understanding the Formation and Evolution of Interstellar Prebiotic Molecules

open access: yesFrontiers in Astronomy and Space Sciences, 2021
Stellar systems are often formed through the collapse of dense molecular clouds which, in turn, return copious amounts of atomic and molecular material to the interstellar medium.
Duncan V. Mifsud   +6 more
doaj   +1 more source

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