Results 121 to 130 of about 13,144 (210)

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

Exploring wind-driving dust species in cool luminous giants II. Constraints from photometry of M-type AGB stars

, 2013
The heavy mass loss observed in evolved asymptotic giant branch (AGB) stars is usually attributed to a two-stage process: atmospheric levitation by pulsation-induced shock waves, followed by radiative acceleration of newly formed dust grains.
B. Aringer, K. Eriksson, S. Bladh, S. Höfner, W. Nowotny   +4 more
core   +1 more source

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

HD101584: Circumstellar characteristics and evolutionary status

, 2019
We have performed a study of the characteristics of the circumstellar environment of the binary object HD101584, that provides information on a likely evolutionary scenario.
Bergman, P., Doan, L., Humphreys, E. M. L., Khouri, T., Lindqvist, M., Maercker, M., Nyman, L., Olofsson, H., Ramstedt, S., Tafoya, D., Vlemmings, W. H. T.   +10 more
core   +1 more source

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

Molecules and Chemistry in Red Supergiants

Galaxies
The envelopes of Red Supergiants (RSGs) have a unique chemical environment not seen in other types of stars. They foster an oxygen-rich synthesis but are tempered by sporadic and chaotic mass loss, which distorts the envelope and creates complex outflow ...
Lucy M. Ziurys, Anita M. S. Richards
doaj   +1 more source

Dust distribution in circumstellar disks harboring multi-planet systems

Astronomy & Astrophysics
Context. Theoretical formation models and exoplanet detection surveys indicate that systems with multiple giant planets are common. Aims. We investigate how multiple super-thermal-mass planets embedded in a circumstellar disk shape the dust distribution ...
Roatti V., Picogna G., Marzari F.
doaj   +1 more source