Results 1 to 10 of about 1,238 (134)

Continuous solutions of cosmic-rays and waves in astrophysical environments [PDF]

open access: yesScientific Reports, 2023
The propagation of energetic charged particles and cosmic rays in magnetized thermal plasma is focused. We consider a four-fluid system that consists of thermal plasma, cosmic rays, and two opposite propagating Alfvén waves to investigate the dynamics ...
K. Irshad   +5 more
doaj   +2 more sources

Possible Roles of Transition Metal Cations in the Formation of Interstellar Benzene via Catalytic Acetylene Cyclotrimerization [PDF]

open access: yesMolecules, 2023
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous interstellar molecules. However, the formation mechanisms of PAHs and even the simplest cyclic aromatic hydrocarbon, benzene, are not yet fully understood.
Tatsuhiro Murakami   +3 more
doaj   +2 more sources

A future interstellar probe on the dynamic heliosphere and its interaction with the very local interstellar medium: In-situ particle and fields measurements and remotely sensed ENAs

open access: yesFrontiers in Astronomy and Space Sciences, 2023
The recently published Interstellar Probe (ISP) study report describes a pragmatic mission concept with a launch window that starts in 2036 and is expected to reach several hundreds of astronomical units past the heliopause within a time frame of ≥50 ...
K. Dialynas   +30 more
doaj   +1 more source

The Small-scale Dynamo in a Multiphase Supernova-driven Medium

open access: yesThe Astrophysical Journal, 2023
Magnetic fields grow quickly, even at early cosmological times, suggesting the action of a small-scale dynamo (SSD) in the interstellar medium (ISM) of galaxies. Many studies have focused on idealized, isotropic, homogeneous, turbulent driving of the SSD.
Frederick A. Gent   +3 more
doaj   +1 more source

Multi-line Observations, Models, and Data Needed to Understand the Nature of UV-irradiated Interstellar Matter [PDF]

open access: yesEPJ Web of Conferences, 2022
Far-ultraviolet photons from OB-type massive stars regulate the heating, ionization, and chemistry of much of the neutral interstellar gas in star-forming galaxies.
Goicoechea Javier R.   +2 more
doaj   +1 more source

The Influence of Outflow Feedback in Clumps

open access: yesThe Astrophysical Journal, 2023
We analyzed the influence of outflow feedback from two perspectives: turbulent support and potential disruptive effect, of which 694 clumps and 188 have been identified as outflow candidates.
Qiang Li   +5 more
doaj   +1 more source

High-mass Starless Clumps: Dynamical State and Correlation between Physical Parameters

open access: yesThe Astrophysical Journal, 2023
In order to study the initial conditions of massive star formation, we have previously built a sample of 463 high-mass starless clumps (HMSCs) across the inner Galactic plane covered by multiple continuum surveys.
Bo Huang   +5 more
doaj   +1 more source

Clump-scale Gas Infall in High-mass Star Formation: A Multitransition View with James Clerk Maxwell Telescope HCN (4–3) Mapping

open access: yesThe Astrophysical Journal Supplement Series, 2023
Gas infall motions play a crucial role in high-mass star formation and are characterized by observable signatures of blueshifted asymmetric spectral line profiles (“blue profiles”).
Fengwei Xu   +5 more
doaj   +1 more source

SOFIA and ALMA Investigate Magnetic Fields and Gas Structures in Massive Star Formation: The Case of the Masquerading Monster in BYF 73

open access: yesThe Astrophysical Journal, 2023
We present Stratospheric Observatory For Infrared Astronomy (SOFIA) + Atacama Large Millimeter/submillimeter Array (ALMA) continuum and spectral-line polarization data on the massive molecular cloud BYF 73, revealing important details about the magnetic ...
Peter J. Barnes   +6 more
doaj   +1 more source

SOFIA Observations of 30 Doradus. II. Magnetic Fields and Large-scale Gas Kinematics

open access: yesThe Astrophysical Journal, 2023
The heart of the Large Magellanic Cloud, 30 Doradus, is a complex region with a clear core-halo structure. Feedback from the stellar cluster R136 has been shown to be the main source of energy creating multiple parsec-scale expanding-shells in the outer ...
Le Ngoc Tram   +15 more
doaj   +1 more source

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