Results 101 to 110 of about 293,009 (201)

NEOWISE-R Caught the Luminous SN 2023ixf in Messier 101

The Astrophysical Journal
During routine survey imaging, the reactivated Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE-R) serendipitously caught the Type II supernova SN 2023ixf in Messier 101 on the rise, starting day 3.6 through day 10.9, and again on the ...
Schuyler D. Van Dyk, Tamás Szalai, Roc M. Cutri, J. Davy Kirkpatrick, Carl J. Grillmair, Sergio B. Fajardo-Acosta, Joseph R. Masiero, Amy K. Mainzer, Christopher R. Gelino, József Vinkó, András Péter Joó, András Pál, Réka Könyves-Tóth, Levente Kriskovics, Róbert Szakáts, Krisztián Vida, WeiKang Zheng, Thomas G. Brink, Alexei V. Filippenko   +18 more
doaj   +1 more source

The binding energies of atoms on amorphous silicate dust: A computational study

Astronomy & Astrophysics
Context. We investigate the binding energies of atoms to interstellar dust particles, which play a key role in their growth and evolution as well as the chemical reactions on their surfaces. Aims.
Hansson Kristoffer, Sameera W. M. C., Esmerian Clarke J., Bossion Duncan, Andersson Stefan, Aalto Susanne, Vlemmings Wouter, Knudsen Kirsten K., Nyman Gunnar   +8 more
doaj   +1 more source

What Grain Alignment Can Tell About Circumstellar Discs and Comets

, 2007
Grain alignment theory suggests that grains should be aligned in circumstellar regions and the observational data available supports this conclusion.
A. Lazarian, Lazarian Canadian
core  

Spectroscopy and Photochemistry of the Astrochemical Molecules SiCP and AlCP

The Astrophysical Journal
Through characterization of the electronic excited-state topology, linear-SiCP is predicted to be photostable in the UV region, whereas linear-AlCP is predicted to undergo photodissociation to form Al+CP products after absorption of light in the 200–250 ...
Vincent J. Esposito, Tarek Trabelsi, Rebecca Firth, Ryan C. Fortenberry, Joseph S. Francisco   +4 more
doaj   +1 more source

Silicon Isotopic Composition of Mainstream Presolar SiC Grains Revisited: The Impact of Nuclear Reaction Rate Uncertainties

The Astrophysical Journal Letters
Presolar grains are stardust particles that condensed in the ejecta or in the outflows of dying stars and can today be extracted from meteorites. They recorded the nucleosynthetic fingerprint of their parent stars and thus serve as valuable probes of ...
Hung Kwan Fok, Marco Pignatari, Benoît Côté, Reto Trappitsch   +3 more
doaj   +1 more source

Density-driven dust growth in binary systems: Inhibition of dust settling and growth in circumbinary discs

Astronomy & Astrophysics
Context. Stellar multiplicity alters the density structure of protoplanetary discs and thereby the initial conditions of planet formation. Yet, the interplay between companion-disc interactions and dust growth remains poorly understood. Aims. The goal of
Alaguero Antoine, Cuello Nicolás, Gonzalez Jean-François, Price Daniel J., Lombart Maxime, Smallwood Jeremy L., Thébault Philippe   +6 more
doaj   +1 more source

Iron Isotopic Diagnostics of Presolar Supernova Grains [PDF]

, 2002
The most thoroughly studied of the isotopi-cally anomalous presolar grains are silicon-carbide crystals (1). Both X-type SiC and low-density graphite grains condensed within the interiors of supernovae during their expansion and cooling (2).
Clayton, Donald D, Meyer, Bradley S, The, L.-S.   +2 more
core   +1 more source

COOPERATIVE MARKETING IN SPECIALTY GRAINS AND IDENTITY PRESERVED GRAIN MARKETS [PDF]

Marketing of specialty and identity preserved grains has become an important strategy in the grain marketing industry and is being driven, in part, by consumer and processor demand and an interest in non-GM products.
Janzen, Edward L., Wilson, William W.
core  

The Dust Echo Emission of Fast Blue Optical Transients and Application to the Near-infrared Excess of AT 2018cow

The Astrophysical Journal
A near-infrared (NIR) excess has been discovered in the emission of the representative fast blue optical transient (FBOT) AT 2018cow. It was suggested that this NIR excess could be emitted by the dust surrounding the source and thus could provide a probe
Jing-Yao Li, Yun-Wei Yu, Liang-Duan Liu, Ming-Yan Xiao   +3 more
doaj   +1 more source

Methanol Emission Tracing Ice Chemistry and Dust Evolution in the TW Hya Protoplanetary Disk

The Astronomical Journal
Methanol (CH _3 OH) ice is abundant in space and is a key feedstock for seeding chemical complexity in interstellar and circumstellar environments. Despite its ubiquity, gas-phase methanol has only been detected in one disk around a solar-type star to ...
John D. Ilee, Catherine Walsh, Jenny K. Calahan   +2 more
doaj   +1 more source