Results 131 to 140 of about 834,499 (261)

Hierarchical Structure and Self-gravity in the Maddalena Giant Molecular Cloud

The Astrophysical Journal
In this work, we present data from the Milky Way Imaging Scroll Painting project for the Maddalena giant molecular cloud (GMC). We decompose the ^13 CO emission datacube of the observed region into hierarchical substructures using a modified dendrogram ...
Renjie Shen, Yuehui Ma, Hongchi Wang, Suziye He, Miaomiao Zhang   +4 more
doaj   +1 more source

Composition, structure and chemistry of interstellar dust [PDF]

The observational constraints on the composition of the interstellar dust are analyzed. The dust in the diffuse interstellar medium consists of a mixture of stardust (amorphous silicates, amorphous carbon, polycyclic aromatic hydrocarbons, and graphite ...
Allamandola, Louis J., Tielens, Alexander G. G. M.   +1 more
core   +1 more source

Structure and Fragmentation Scale of a Massive Star-forming Filament in NGC 6334: High-resolution Mid-infrared Absorption Imaging with JWST

The Astrophysical Journal Letters
Dense filaments are believed to be representative of the initial conditions of star formation in molecular clouds. We have used the MIRI instrument on JWST to image the massive filament NGC 6334M at d  ∼ 1.3 kpc with unprecedented resolution and dynamic ...
Philippe André, Michael Mattern, Doris Arzoumanian, Yoshito Shimajiri, Annie Zavagno, Daisei Abe, Delphine Russeil   +6 more
doaj   +1 more source

The Smallest Sizes of Diffuse Interstellar Clouds [PDF]

, 1984
J. M. Dickey, J. Crovisier, I. Kazès
openalex   +1 more source

A sequential acid-base (SAB) mechanism in the interstellar medium: The emergence of cis formic acid in dark molecular clouds [PDF]

, 2023
Juan García de la Concepción, I. Jiménez-Serra, J. C. Corchado, Germán Molpeceres, Antonio Martínez-Henares, V. M. Rivilla, Laura Colzi, J. Martı́n-Pintado   +7 more
openalex   +1 more source

Variation in X_CO Factor in N55 Region

Universe
The XCO factor is defined as XCO=N(H2)/W12CO. It is useful for estimating cloud mass. However, there is only limited research on how the XCO factor varies within a single cloud.
Qiang Li, Mingyue Li, Li Zhang, Songpeng Pei   +3 more
doaj   +1 more source

Photoabsorption and photodissociation of molecules important in the interstellar medium [PDF]

Photoabsorption and fluorescence cross sections of molecules important in the interstellar medium were measured in the 90 to 200 nm region using synchrotron radiation, excimer laser, and condensed discharge lamps as light sources.
Lee, Long C., Suto, Masako
core   +1 more source

Pathway to the identification of C60+ in diffuse interstellar clouds. [PDF]

Philos Trans A Math Phys Eng Sci, 2016
Maier JP, Campbell EK.
europepmc   +1 more source

The Young Ages of 70 μm Dark Clumps Inferred from Carbon Chain Chemistry

The Astrophysical Journal
The physical conditions of the earliest environment of high-mass star formation are currently poorly understood. To that end, we present observations of the carbon chain molecules HC _5 N, CCS, and HC _7 N in the 22–25 GHz band toward 12 high-mass 70 μ m
Kadin Worthen, Brian E. Svoboda, David S. Meier, Juergen Ott, Rachel Friesen, Jennifer Patience, Yancy Shirley   +6 more
doaj   +1 more source

Circumstellar dust [PDF]

The presence of dust in the general interstellar medium is inferred from the extinction, polarization, and scattering of starlight; the presence of dark nebulae; interstellar depletions; the observed infrared emission around certain stars and various ...
Dwek, E.
core   +1 more source