Results 101 to 110 of about 2,211 (208)

Adsorption of Volatiles on Dust Grains in Protoplanetary Disks

The Astrophysical Journal
The adsorption of volatile molecules onto dust grain surfaces fundamentally influences dust-related processes, including condensation of gas-phase molecules, dust coagulation, and planet formation in protoplanetary disks. Using advanced ab initio density
Lile Wang, Feng Long, Haifeng Yang, Ruobing Dong, Shenzhen Xu   +4 more
doaj   +1 more source

Microscopic simulation of chemical processes on interstellar dust grains

ASTRONOMY AT THE EPOCH OF MULTIMESSENGER STUDIES. Proceedings of the VAK-2021 conference, Aug 23–28, 2021, 2022
A.I. Vasyunin, G.S. Fedoseev, A.B. Ostrovskii, M.G. Medvedev   +3 more
openaire   +1 more source

Methane Formation Efficiency on Icy Grains: Role of Adsorption States

The Astrophysical Journal
Methane (CH _4 ) is one of the major components of the icy mantle of cosmic dust prevalent in cold, dense regions of interstellar media, playing an important role in the synthesis of complex organic molecules and prebiotic molecules.
Masashi Tsuge, Germán Molpeceres, Yuri Aikawa, Naoki Watanabe   +3 more
doaj   +1 more source

Interstellar Residence Times of Presolar SiC Dust Grains From the Murchison Carbonaceous Meteorite

, 2016
The time span between the formation of presolar grains in stellar outflows and their incorporation into early solar-system solids is poorly constrained.
Amari, Sachiko, Heck, Philipp, Meier, Matthias M.M., Zinner, Ernst, Wieler, Rainer, Lewis, Roy S, Ott, Ulrich, Avila, Janaina, Baur, Heinrich, Gyngard, Frank   +9 more
core   +1 more source

Scylla. VI. Parsec-scale Dust Extinction Maps in the SMC and LMC

The Astrophysical Journal
We present a novel methodology for mapping dust extinction in nearby galaxies at parsec-scale resolution. We apply it to 68 Hubble Space Telescope (HST) fields within the Small and Large Magellanic Clouds (23 fields in the SMC and 45 fields in the LMC ...
Christina W. Lindberg, Claire E. Murray, Christopher J. R. Clark, Caroline Bot, Clare Burhenne, Yumi Choi, Roger E. Cohen, Steven R. Goldman, Karl D. Gordon, Kristen B. W. McQuinn, Julia Roman-Duval, Karin M. Sandstrom, Edward F. Schlafly, Elizabeth Tarantino, Benjamin F. Williams, Petia Yanchulova Merica-Jones, Catherine Zucker   +16 more
doaj   +1 more source

Simulating molecular cloud regulated star formation in Galaxies [PDF]

, 2007
This thesis is primarily concerned with understanding the process of galaxy formation via the simulation of the interstellar medium, star formation and supernova feedback.
Booth, Craig Martin
core  

Magnetically Aligned Grains as a Ubiquitous Source of Spin-polarized Electrons and Chiral-symmetry-breaking Agents

The Astrophysical Journal
The unique biosignature of life on Earth is the homochirality of organic compounds, such as amino acids, proteins, and sugars. High-energy spin-polarized (spinup or spindown) electrons (SPEs) from the β decay of radioactive nuclei have been proposed as a
Thiem Hoang
doaj   +1 more source

Microwave Extinction Measurements of Aerosolized Interstellar Dust Analogs

, 2016
Interstellar dust plays an important role in astrophysical processes and ob- servational astronomy, and a thorough knowledge of its composition and optical properties is essential to astronomy. However, only very limited intact samples of interstellar
Scherrer, Joseph
core  

Are Stars Really Ingesting Their Planets? Examining an Alternative Explanation

The Astrophysical Journal
Numerous stars exhibit surprisingly large variations in their refractory element abundances, often interpreted as signatures of planetary ingestion events.
Nadine H. Soliman, Philip F. Hopkins
doaj   +1 more source

Consistent Modeling of Nonequilibrium Dust Sublimation and the Interactions with Dust Evolution in the Inner Regions of Protoplanetary Disks

The Astrophysical Journal
The inner regions of protoplanetary disks are host to the sublimation of dust grains, a process traditionally modeled using equilibrium thermodynamics.
Sheng Xu, Lile Wang, Luis C. Ho, Renyue Cen, Shenzhen Xu   +4 more
doaj   +1 more source