Results 51 to 60 of about 884 (199)

Revisiting CN− Formation Mechanisms in Electron Collisions with Benzonitrile

ChemPhysChem, Volume 27, Issue 1, January 2026.
This study explores negative ion formation via electron attachment, revealing CN− formation at 3.0 and 7–10 eV. Dissociation pathways are analyzed using G4(MP2) and CASPT2 calculations, highlighting the coupling between the π4* and σ* resonances critical for interstellar chemistry. Radiation‐induced processes in the aromatic cyano compound benzonitrile
Rodrigo Rodrigues, Mónica Mendes, Daniel Bou‐Debes, João Ameixa, Ali Kamali, Oddur Ingólfsson, Samuel Eden, Lucas M. Cornetta, Filipe Ferreira da Silva   +8 more
wiley   +1 more source

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

The 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, Bhaswati Mookerjea, Rolf Güsten, Friedrich Wyrowski, C. H. Ishwara-Chandra   +4 more
doaj   +1 more source

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

Advanced 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, Eleni Papadopoulou, Grigorios Kostopoulos, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria Gkara, Chara C. Mitropoulou, Nikos D. Lagaros   +8 more
wiley   +1 more source

On the universality of interstellar filaments: theory meets simulations and observations [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
Filaments are ubiquitous in the universe. Recent observations have revealed that stars and star clusters form preferentially along dense filaments. Understanding the formation and properties of filaments is therefore a crucial step in understanding star formation.
openaire   +3 more sources

Planck intermediate results: XXXIII. Signature of the magnetic field geometry of interstellar filaments in dust polarization maps [PDF]

, 2020
© ESO, 2016.Planck observations at 353 GHz provide the first fully sampled maps of the polarized dust emission towards interstellar filaments and their backgrounds (i.e., the emission observed in the surroundings of the filaments).
Bond J., Bouchet F., Diego J., Boulanger F., Douspis M., Elsner F., Borrill J., Fraisse A., Danese L., Crill B., Forni O., Dickinson C., Arzoumanian D., Christensen P., Davis R., Franceschi E., Ade P., Bersanelli M., Burigana C., Bernard J., Calabrese E., Davies R., De Rosa A., Finelli F., Falgarone E., Bonavera L., Dupac X., Doré O., Eriksen H., Cardoso J., Catalano A., Chamballu A., Clements D., Combet C., Frailis M., Baccigalupi C., Galli S., Bracco A., Delabrouille J., Frejsel A., Couchot F., Cuttaia F., Arnaud M., Berné O., Banday A., Colombo L., Battaner E., De Bernardis P., De Zotti G., Ferrière K., Ducout A., Alves M., Chiang H., Bonaldi A., Bartolo N., Donzelli S., Benoit-Lévy A., Aumont J., Curto A., Bielewicz P., Barreiro R., Enßlin T., Colombi S., Galeotta S., Benabed K., Aghanim N.   +65 more
core   +2 more sources

New Arabic Records From Cairo on Supernovae 1181 and 1006

Astronomische 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, H. Halm, R. Neuhäuser, D. L. Neuhäuser   +3 more
wiley   +1 more source

Structures of Magnetically-Supported Filaments and their Appearance in the Linear Polarization [PDF]

, 2017
Dust thermal emissions observed with Herschel have revealed that interstellar molecular clouds consist of many filaments. Polarization observation of interstellar extinctions in the optical and near IR wavelengths shows that the dense filaments are ...
Tomisaka, Kohji (5389906), Tomisaka, Kohji   +1 more
core   +1 more source

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

The 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, Tsuyoshi Inoue, Shu-ichiro Inutsuka   +2 more
doaj   +1 more source

The Cassiopeia Filament: A Blown Spur of the Local Arm

The 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, Li Sun, Jiancheng Feng, Shiyu Zhang, Weihua Guo, Xiaoyun Xu, Yang Su, Yan Sun, Shaobo Zhang, Xin Zhou, Zhiwei Chen, Qing-Zeng Yan, Miaomiao Zhang, Min Fang, Ji Yang   +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

Geostandards 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, Laurence Lemelle   +1 more
wiley   +1 more source