Results 41 to 50 of about 772 (182)

Characteristics of Interstellar and Circumstellar Dust [PDF]

International Astronomical Union Colloquium, 1991
Abstract: This paper reviews our current knowledge of interstellar and circumstellar dust from an observational point of view. It is concluded that interstellar dust is highly heterogenous. It consist of a large number of different materials formed in a great variety of stellar birthsites under varying conditions and each with a highly isotopically ...
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Dust motion and possibility of dust growth in a growing circumstellar disk

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT We calculate the evolution of a star-forming cloud core using a three-dimensional resistive magnetohydrodynamics simulation, treating dust grains as Lagrangian particles, to investigate the dust motion in the early star formation stage.
Shunta Koga, Masahiro N Machida
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Clusters Stagnating During Condensation: Metastable Material or a Separate State of Matter?

Annalen der Physik, Volume 537, Issue 10, October 2025.
Condensation stagnation, that is, the existence of a delay between nucleation and growth during the gas‐phase particle formation, is a crucial phenomenon, which manifests itself as the presence of supercritical clusters in resulting particulates. The light emission signature of stagnant clusters is identified in the magnesium particle flame in air, and,
Nicholas R. Jaramillo, Cole A. Ritchie, Michelle L. Pantoya, Igor E. Agranovski, Igor Altman   +4 more
wiley   +1 more source

Dust distribution in circumstellar shells [PDF]

Proceedings of the International Astronomical Union, 2011
AbstractWe present numerical simulations of the hydrodynamical interactions that produce circumstellar shells. These simulations include several scenarios, such as wind-wind interaction and wind-ISM collisions. In our calculations we have taken into account the presence of dust in the stellar wind. Our results show that, while small dust grains tend to
van Marle, Allard Jan, Meliani, Zakaria, Keppens, Rony, Decin, Leen   +3 more
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SN 2018bsz: Significant Dust Formation in a Nearby Superluminous Supernova

The Astrophysical Journal
We investigate the thermal emission and the extinction from dust associated with the nearby ( z = 0.0267) superluminous supernova (SLSN) 2018bsz. Our dataset combines daily cadence, simultaneous optical and near-infrared (NIR) coverage up to ∼100 days ...
T.-W. Chen, S. J. Brennan, R. Wesson, M. Fraser, T. Schweyer, C. Inserra, S. Schulze, M. Nicholl, J. P. Anderson, E. Y. Hsiao, A. Jerkstrand, E. Kankare, E. C. Kool, T. Kravtsov, H. Kuncarayakti, G. Leloudas, C.-J. Li, M. Matsuura, M. Pursiainen, R. Roy, A. J. Ruiter, P. Schady, I. R. Seitenzahl, J. Sollerman, L. Tartaglia, L. Wang, R. M. Yates, S. Yang, D. Baade, R. Carini, A. Gal-Yam, L. Galbany, S. González-Gaitán, M. Gromadzki, C. P. Gutiérrez, R. Kotak, K. Maguire, P. A. Mazzali, T. E. Müller-Bravo, E. Paraskeva, P. J. Pessi, G. Pignata, A. Rau, D. R. Young   +43 more
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Laboratory Astrophysics of Circumstellar Dust [PDF]

Symposium - International Astronomical Union, 1999
This paper summarizes laboratory investigations of Stardust analogue materials with special emphasis on the spectroscopic behaviour of silicates and carbonaceous materials. The review will also deal with the identification of the observed features in the dust spectra of AGB stars.
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L1448 IRS3B: Dust Polarization Aligned with Spiral Features, Tracing Gas Flows

The Astrophysical Journal
Circumstellar disk dust polarization in the (sub)millimeter is, for the most part, not from dust grain alignment with magnetic fields but rather indicative of a combination of dust self-scattering with a yet unknown alignment mechanism that is consistent
Leslie W. Looney, Zhe-Yu Daniel Lin, Zhi-Yun Li, John J. Tobin, Martin Radecki, Syzygy Butte, Ian W. Stephens, Manuel Fernández-López, Haifeng Yang, Nickalas K. Reynolds, Patrick Sheehan, Woojin Kwon, Rachel Harrison, Allen North   +13 more
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Composite grains: Application to circumstellar dust

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2011
Using the discrete dipole approximation (DDA) we calculate the absorption efficiency of the composite grain, made up of a host silicate spheroid and inclusions of graphite, in the spectral region 5.0-25.0μm.
D. B. Vaidya, R. Gupta
doaj   +1 more source

Radiative Pressure on Fractal Dust Grains in Oxygen-rich AGB Stars

The Astrophysical Journal
There is still considerable debate on the exact composition of grains formed in the outflows of O-rich, asymptotic giant branch stars. Estimates of the expected condensation distances based on radiative transfer calculations show that iron-free silicates
Frank T. Ferguson, Joseph A. Nuth, John A. Paquette   +2 more
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JWST Imaging of the Closest Globular Clusters—V. The White Dwarfs Cooling Sequence of M4

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT We combine infrared (IR) observations collected by the James Webb Space Telescope with optical deep images by the Hubble Space Telescope taken ~20 years earlier to compute proper‐motion membership for the globular cluster (GC) M4 (NGC 6121) along its entire white dwarf (WD) cooling sequence (CS).
Luigi R. Bedin, Mattia Libralato, Maurizio Salaris, Domenico Nardiello, Michele Scalco, Massimo Griggio, Jay Anderson, Pierre Bergeron, Andrea Bellini, Roman Gerasimov, Adam J. Burgasser, Daniel Apai   +11 more
wiley   +1 more source