Results 61 to 70 of about 615 (185)

Formation of Methanol via Fischer‐Tropsch Catalysis by Cosmic Iron Sulphide

ChemPhysChem, Volume 25, Issue 17, September 2, 2024.
Periodic quantum mechanical simulations evidence the potentiality to synthesise methanol through a Fischer‐Tropsch mechanism in different astrophysical environments facilitated by the catalytic properties of cosmic FeS grains, which are enhanced by the presence of naturally‐occurring point surface defects.
Berta Martinez‐Bachs, Alexia Anguera‐Gonzalez, Gerard Pareras, Albert Rimola   +3 more
wiley   +1 more source

Sulforaphane and ophthalmic diseases

Food Science &Nutrition, Volume 12, Issue 8, Page 5296-5311, August 2024.
Sulforaphane (SFN) is an organosulfur compound categorized as an isothiocyanate (ITC), primarily extracted from cruciferous vegetables like broccoli and cabbage. This review comprehensively outlines recent research on SFN, elucidates its mechanisms of action, and discusses potential therapeutic benefits for eye disorders such as age‐related macular ...
Yichi Zhang, Xiaojing Zhao, Yang Liu, Xiuxia Yang   +3 more
wiley   +1 more source

A Magnetized Jet from a Massive Protostar [PDF]

Science, 2010
Stellar Jets Supersonic jets of energized charged particles are a common phenomenon in astrophysics, emanating from sources that range widely in mass: from brown dwarfs to super massive black holes in the centers of galaxies. Carrasco-González et al. (p.
Carrasco-González, Carlos, Rodríguez, Luis F., Anglada Pons, Guillem Josep, Martí, Josep, Torrelles, José M., Osorio, Mayra   +5 more
openaire   +4 more sources

Coevolution of phyllosilicate, carbon, sulfide, and apatite in Ryugu's parent body

Meteoritics &Planetary Science, Volume 59, Issue 8, Page 2073-2096, August 2024.
Abstract We analyzed an asteroid Ryugu sample returned to Earth by JAXA's Hayabusa2 mission using nanoIR, SEM, and TEM microscopy. We identified multiple distinct carbon reservoirs within the phyllosilicate matrix and demonstrate infrared spectral affinities for some of the carbon to insoluble organic matter (IOM).
Zack Gainsforth, Gerardo Dominguez, Kana Amano, Megumi Matsumoto, Yuri Fujioka, Eiichi Kagawa, Tomoki Nakamura, Shogo Tachibana, Tomoyo Morita, Mizuha Kikuiri, Hisayoshi Yurimoto, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masano Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei‐ichiro Watanabe, Yuichi Tsuda, Hayabusa2 Initial Analysis Stone Team   +31 more
wiley   +1 more source

Studying the Effect of Radiation Pressure on Evolution of a Population III Stellar Cluster

The Astrophysical Journal
Recent numerical simulations have shown that the unstable disk within the central regime of the primordial gas cloud fragments to form multiple protostars on several scales.
Sukalpa Kundu, Jayanta Dutta
doaj   +1 more source

Formation of Massive and Wide First-star Binaries in Radiation Hydrodynamic Simulations

The Astrophysical Journal, 2023
We study the formation of Population III stars by performing radiation hydrodynamic simulations for three different initial clouds extracted from cosmological hydrodynamic simulations.
Kazuyuki Sugimura, Tomoaki Matsumoto, Takashi Hosokawa, Shingo Hirano, Kazuyuki Omukai   +4 more
doaj   +1 more source

On Solar Type Protostars [PDF]

International Astronomical Union Colloquium, 1980
The formation of a 1 M⊙ protostar in spherical symmetry has been followed in time dependent hydrodynamics with a detailed description of the equation of state and a careful treatment of radiative transport. The comparison of the dynamic evolution with observation is made in terms of the Hertzprung-Russell diagram.
Karl-Heinz A. Winkler, Michael J. Newman
openaire   +1 more source

Limitations of the modified blackbody fit method for determining molecular cloud properties

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract Achieving a comprehensive understanding of the star and planet formation process is one of the fundamental tasks of astrophysics, requiring detailed knowledge of the physical conditions during the different phases of this process. During the earliest stages, that is, concerning physical processes in molecular clouds and filaments, the column ...
Niko Zielinski, Sebastian Wolf
wiley   +1 more source

Magnetic field measurements in a sample of Class I and flat-spectrum protostars observed with SPIRou

Astronomy & Astrophysics
Context. Magnetic fields play a crucial role throughout stellar evolution in regulating angular momentum, channelling accretion, and launching jets and outflows.
Drouglazet L., Alecian E., Sousa A., Cristofari P. I., Artigau E., Bouvier J., Carmona A., Cook N. J., Dougados C., Duchêne G., Folsom C. P., Nowacki H., Perraut K., Alencar S. H. P., Amard L., Audard M., Cabrit S., Donati J.-F., Grankin K., Grosso N., Kochukhov O., Kóspál Á., Le Gouellec V. J. M., Manchon L., Pantolmos G., Petit P., Petitdemange L., Devaraj R., Shang H., Takami M.   +29 more
doaj   +1 more source

The JWST-NIRCam View of Sagittarius C. I. Massive Star Formation and Protostellar Outflows

The Astrophysical Journal
We present James Webb Space Telescope (JWST) Near Infrared Camera observations of the massive star-forming molecular cloud Sagittarius C (Sgr C) in the Central Molecular Zone (CMZ).
Samuel Crowe, Rubén Fedriani, Jonathan C. Tan, Alva Kinman, Yichen Zhang, Morten Andersen, Lucía Bravo Ferres, Francisco Nogueras-Lara, Rainer Schödel, John Bally, Adam Ginsburg, Yu Cheng, Yao-Lun Yang, Sarah Kendrew, Chi-Yan Law, Joseph Armstrong, Zhi-Yun Li   +16 more
doaj   +1 more source