Results 31 to 40 of about 342 (165)

Kinematics and Star Formation in the Hub–Filament System G6.55-0.1

open access: yesThe Astrophysical Journal
Hub–filament systems (HFSs) being the potential sites of formation of star clusters and high-mass stars, provide a testbed for the current theories that attempt to explain star formation globally.
Saurav Sen   +4 more
doaj   +1 more source

A Comprehensive Review of Additive Manufacturing for Space Applications: Materials, Advances, Challenges, and Future Directions

open access: yesAdvanced Engineering Materials, Volume 27, Issue 22, November 2025.
Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos   +8 more
wiley   +1 more source

Photometric and Spectroscopic Observations of a Diffuse Interstellar Filament in the Foreground of the Magellanic Clouds [PDF]

open access: yesThe Astrophysical Journal, 1998
We report the results of a photometric and spectroscopic study of stars that appear toward an infrared bright filament in the region between the LMC and SMC in the constellation Mensa. The filament was chosen for study because of its large angular size, intense IR emission, and proximity to an X-ray source observed using ROSAT.
Bryan E. Penprase   +3 more
openaire   +1 more source

New Arabic Records From Cairo on Supernovae 1181 and 1006

open access: yesAstronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000–5000 year), the unusual star IRAS00500+6713 with a surrounding nebula (Pa‐30) has an expansion age not inconsistent with a SN Iax explosion in ad 1181 under the assumption that neither acceleration nor ...
J. G. Fischer   +3 more
wiley   +1 more source

Growth of Massive Molecular Cloud Filament by Accretion Flows. I. Slow-shock Instability versus Ambipolar Diffusion

open access: yesThe Astrophysical Journal
The Herschel Gould Belt Survey showed that stars form in dense filaments in nearby molecular clouds. Recent studies suggest that massive filaments are bound by the slow shocks caused by accretion flows onto the filaments.
Daisei Abe   +2 more
doaj   +1 more source

The Cassiopeia Filament: A Blown Spur of the Local Arm

open access: yesThe Astronomical Journal, 2022
We present wide-field and high-sensitivity CO(1–0) molecular line observations toward the Cassiopeia region, using the 13.7 m millimeter telescope of the Purple Mountain Observatory.
Xuepeng Chen   +14 more
doaj   +1 more source

GGR Handbook of Rock and Mineral Analysis Chapter 16 Nano‐Imaging for Advanced X‐Ray Fluorescence and Absorption Spectroscopy Applications

open access: yesGeostandards and Geoanalytical Research, Volume 49, Issue 3, Page 495-533, September 2025.
Key Points Synchrotron nano‐imaging is necessary to locate elemental nanophases. Trace metal quantification requires high sensitivity nano‐XRF. Trace metal speciation relies on nano‐XANES using nano‐XRF. This chapter (Nano‐Imaging for Advanced X‐ray Fluorescence and Absorption Spectroscopy Applications) is a contribution to the Geostandards and ...
Alexandre S. Simionovici   +1 more
wiley   +1 more source

Aspect ratios of far-infrared and H I filaments in the diffuse interstellar medium at high Galactic latitudes

open access: yesAstronomy & Astrophysics, 2023
Context. Dusty magnetized structures observable in the far-infrared (FIR) at high Galactic latitudes are ubiquitous and found to be closely related to H I filaments with coherent velocity structures. Aims. Considering dimensionless morphological characteristics based on Minkowski functionals, we determine the distribution of filamentarities ℱ and ...
Kalberla, P. M. W., Haud, U.
openaire   +2 more sources

TRAO Survey of Nearby Filamentary Molecular Clouds, the Universal Nursery of Stars (TRAO-FUNS). III. Filaments and Dense Cores in the NGC 2068 and NGC 2071 Regions of Orion B

open access: yesThe Astrophysical Journal, 2023
We present the results of molecular line observations performed toward the NGC 2068 and NGC 2071 regions of the Orion B cloud as the TRAO-FUNS project to study the roles of the filamentary structure in the formation of dense cores and stars in the clouds.
Hyunju Yoo   +11 more
doaj   +1 more source

When Magnetic Fields Sculpt the Sky: The Riegel–Crutcher Cloud in Optical Polarization

open access: yesThe Astrophysical Journal
Filamentary structures are ubiquitous in the interstellar medium, yet the extent to which magnetic fields influence the morphology of cold atomic gas remains an open question.
Gabriel A. P. Franco   +4 more
doaj   +1 more source

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