Results 21 to 30 of about 77,477 (148)
The Astrophysical Journal, 2023 We present a new model of interstellar dust in which large grains are a single composite material, “astrodust,” and nanoparticle-sized grains come in distinct varieties including polycyclic aromatic hydrocarbons (PAHs). We argue that a single-composition
Brandon S. Hensley, B. T. Draine
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exoALMA. XVII. Characterizing the Gas Dynamics around Dust Asymmetries [PDF]
Astrophysical Journal LettersThe key planet-formation processes in protoplanetary disks remain an active matter of research. One promising mechanism to radially and azimuthally trap millimeter-emitting dust grains, enabling them to concentrate and grow into planetesimals, is ...
L. Wölfer +33 more
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The Astrophysical Journal, 2023 Direct photometric measurements of the cosmic optical background (COB) provide an important point of comparison to both other measurement methodologies and models of cosmic structure formation, and permit a cosmic consistency test with the potential to ...
Teresa Symons +4 more
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Rotational Disruption of Dust and Ice by Radiative Torques in Protoplanetary Disks and the Implications for Observations [PDF]
Astrophysical Journal, 2020 Dust and ice mantles on dust grains play an important role in various processes in protoplanetary disks (PPDs) around a young star, including planetesimal formation, surface chemistry, and being the reservoir of water in habitable zones.
Ngo-Duy Tung, Thiem C. Hoang
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Frontiers in Astronomy and Space Sciences, 2022 Modern understanding of dust astrophysics reveals that radiative torques (RATs) arising from the radiation–dust interaction can induce two fundamental effects: grain alignment and rotational disruption.
Le Ngoc Tram, Thiem Hoang, Thiem Hoang
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Gap-opening Planets Make Dust Rings Wider
The Astrophysical Journal, 2023 As one of the most commonly observed disk substructures, dust rings from high-resolution disk surveys appear to have different radial widths. Recent observations on PDS 70 and AB Aur reveal not only planets in the disk, but also the accompanying wide ...
Jiaqing Bi, Min-Kai Lin, Ruobing Dong
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Photodissociation and photoionisation of atoms and molecules of astrophysical interest [PDF]
, 2017 A new collection of photodissociation and photoionisation cross sections for 102 atoms and molecules of astrochemical interest has been assembled, along with a brief review of the basic processes involved.
A. Heays, A. Bosman, E. F. Dishoeck
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The Astrophysical Journal Supplement Series, 2023 Astronomical observations of the polarized intensity of scattered visible light have revealed the presence of dust envelopes around different types of evolved stars.
Juan Carlos Gómez Martín +10 more
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Dust Polarization toward Embedded Protostars in Ophiuchus with ALMA. III. Survey Overview [PDF]
Astrophysical Journal Supplement Series, 2019 We present 0.″25 resolution (35 au) ALMA 1.3 mm dust polarization observations for 37 young stellar objects (YSOs) in the Ophiuchus molecular cloud. These data encompass all the embedded protostars in the cloud and several flat-spectrum and Class II ...
S. Sadavoy +9 more
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Frontiers in Astronomy and Space Sciences, 2021 In cold galactic molecular clouds, dust grains are coated by icy mantles and are prevalently charged negatively, because of the capture of the electrons in the gas.
A. Rimola +3 more
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