Results 1 to 10 of about 1,445,074 (221)

Cloud radiative effect dominates variabilities of surface energy budget in the dark Arctic [PDF]

open access: yesScientific Reports
Climate models simulate a wide range of temperatures in the Arctic. Here we investigate one of the main drivers of changes in surface temperature: the net surface heat flux in the models.
Cheng Tao, Minghua Zhang, Shaocheng Xie
doaj   +2 more sources

A Simplified Model for Investigating the Magnetic Field Morphology of a Massive Clump in an Infrared Dark Cloud [PDF]

open access: yesIranian Journal of Astronomy and Astrophysics, 2022
Observational results of the infrared dark clouds (IRDCs) reveal that these clouds exhibit a clumpy structure with directional line-of-sight velocity gradients.
Abdolreza Sharifi, Mohsen Nejad-Asghar
doaj   +1 more source

JWST Reveals Widespread CO Ice and Gas Absorption in the Galactic Center Cloud G0.253+0.016

open access: yesThe Astrophysical Journal, 2023
We report JWST NIRCam observations of G0.253+0.016, the molecular cloud in the Central Molecular Zone known as “The Brick,” with the F182M, F187N, F212N, F410M, F405N, and F466N filters.
Adam Ginsburg   +9 more
doaj   +1 more source

Discovery of Seven Volcanic Outbursts on Io from an Infrared Telescope Facility Observation Campaign, 2016–2022

open access: yesThe Planetary Science Journal, 2023
This study analyzes near-infrared measurements of Io, Jupiter's moon, observed over 170 nights from 2016 to early 2022 using the NASA Infrared Telescope Facility (IRTF).
Christian D. Tate   +4 more
doaj   +1 more source

Investigating the Globally Collapsing Hub–Filament Cloud G326.611+0.811

open access: yesThe Astrophysical Journal, 2023
We present a dynamics study toward the G326.611+0.811 (G326) hub–filament system (HFS) cloud using new APEX observations of both ^13 CO and C ^18 O ( J = 2–1).
Yu-Xin He   +10 more
doaj   +1 more source

Fragmentation of the High-mass “Starless” Core G10.21-0.31: A Coherent Evolutionary Picture for Star Formation

open access: yesThe Astrophysical Journal, 2023
G10.21-0.31 is a 70 μ m dark high-mass starless core ( M > 300 M _⊙ within r < 0.15 pc) identified in the Spitzer, Herschel, and APEX continuum surveys, and is believed to harbor the initial stages of high-mass star formation.
Wenyu Jiao   +5 more
doaj   +1 more source

ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Density Structure of Centrally Concentrated Prestellar Cores from Multiscale Observations

open access: yesThe Astrophysical Journal, 2023
Starless cores represent the initial stage of evolution toward (proto)star formation, and a subset of them, known as prestellar cores, with high density (∼ 10 ^6 cm ^−3 or higher) and being centrally concentrated are expected to be embryos of (proto ...
Dipen Sahu   +25 more
doaj   +1 more source

A chemical link between methylamine and methylene imine and implications for interstellar glycine formation

open access: yesCommunications Chemistry, 2022
The detection of glycine in comets is suggestive of a cosmic origin for amino acids on Earth, but the formation of glycine in interstellar media remains poorly understood.
Prasad Ramesh Joshi, Yuan-Pern Lee
doaj   +1 more source

Multiscale Dynamical Scenario of High-mass Star Formation in an IRDC Filament G34

open access: yesThe Astrophysical Journal, 2023
There is growing evidence that high-mass star formation (HMSF) is a multiscale, dynamical process in molecular clouds, where filaments transport gas material between larger and smaller scales.
Sirong Pan, Hong-Li Liu, Sheng-Li Qin
doaj   +1 more source

The infrared Galactic disk: What have we learned?

open access: yesEPJ Web of Conferences, 2012
A brief overview is given of some of the new insights we have achieved from the Spitzer/GLIMPSE/MIPSGAL surveys of the Galactic plane. Particular emphasis is given to infrared bubbles, rapidly accreting protostars, infrared dark clouds, and diffuse PAH ...
Churchwell E.
doaj   +1 more source

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