Results 91 to 100 of about 13,043 (174)

86th Annual Meeting of the Meteoritical Society (2024)

Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley   +1 more source

Simulations of Multiple Dust Ring Formation in a Subsolar-metallicity Protoplanetary Disk

The Astrophysical Journal
Super-Earths exist around subsolar-metallicity host stars with a frequency comparable to that around solar-metallicity stars, suggesting efficient assembly of dust grains even in metal-deficient environments.
Ryoki Matsukoba, Eduard I. Vorobyov, Takashi Hosokawa   +2 more
doaj   +1 more source

Circumstellar molecular line emission from S-type AGB stars: Mass-loss rates and SiO abundances

, 2009
The main aim is to derive reliable mass-loss rates and circumstellar SiO abundances for a sample of 40 S-type AGB stars based on new multi-transitional CO and SiO radio line observations.
Bieging, Bieging, Chen, Cherchneff, Cotton, Danchi, F. L. Schöier, González Delgado, Groenewegen, Groenewegen, Groenewegen, Groenewegen, H. Olofsson, Huggins, Höfner, Höfner, Ivezic, Jorissen, Jura, Justtanont, Kahane, Knapp, Kwok, Lindqvist, Nyman, Olofsson, Olofsson, Ramstedt, Ramstedt, Reid, Reid, S. Ramstedt, Sahai, Salpeter, Scalo, Schöier, Schöier, Schöier, Schöier, Schöier, Schöier, Schöier, Stanek, Stephenson, Stephenson, Suh, van der Tak, Volk, Whitelock, Willems, Wing, Woitke, Young   +52 more
core   +1 more source

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

The abundance of HCN in circumstellar envelopes of AGB stars of different chemical types

, 2013
A multi-transition survey of HCN (sub-) millimeter line emission from a large sample of AGB stars of different chemical type is presented. The data are analysed and circumstellar HCN abundances are estimated.
Bieging, J. H., Lindqvist, M., Marvel, K. B., Olofsson, H., Ramstedt, S., Schöier, F. L.   +5 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

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