Results 81 to 90 of about 13,043 (174)
, 2013 Millimeter-wavelength polarization measurements offer a promising method for probing the geometry of magnetic fields in circumstellar disks. Single dish observations and theoretical work have hinted that magnetic field geometries might be predominantly ...
Hughes, A. M. +3 more
core +1 more source
Grain growth in newly discovered young eruptive stars
, 2020 FU Orionis-type stars are young stellar objects showing large outbursts due to highly enhanced accretion from the circumstellar disk onto the protostar.
Carmona, A. +6 more
core +3 more sources
The Spheroidal Analog Method for Modeling Irregular Porous Aggregates
The Astrophysical JournalIt is shown that the optical properties of an irregular porous grain with effective radius a _eff ≲ 3 λ (where λ is the wavelength) can be well approximated by a “spheroidal analog”: a spheroid with appropriate axial ratio and size, with a dielectric ...
B. T. Draine
doaj +1 more source
Submillimeter-wavelength Polarimetry of IRC+10216
The Astrophysical JournalWe present SCUBA-2/POL-2 850 μ m polarimetric observations of the circumstellar envelope (CSE) of the carbon-rich asymptotic giant branch (AGB) star IRC+10216.
B-G. Andersson +7 more
doaj +1 more source
87th Annual Meeting of the Meteoritical Society 2025: Abstracts
Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley +1 more source
The First Detailed Look at a Brown Dwarf Disk
, 2003 The combination of mid-infrared and recent submm/mm measurements allows us to set up the first comprehensive spectral energy distribution (SED) of the circumstellar material around a young Brown Dwarf.
C. P. Dullemond +7 more
core +1 more source
The Astronomical JournalThe presence of infrared excesses around stars directly correlates with spatially resolved imaging detections of circumstellar disks at both millimeter and optical/near-infrared wavelengths.
Justin Hom +10 more
doaj +1 more source
Astronomy & AstrophysicsContext. Polycyclic aromatic hydrocarbons (PAHs) constitute a significant fraction of the Universe’s carbon budget, playing a key role in the cosmic carbon cycle and dominating the mid-infrared spectra of astrophysical environments in which they reside ...
Smith-Perez Charlotte +4 more
doaj +1 more source
Detailed Radial Scale Height Profile of Dust Grains as Probed by Dust Self-scattering in HL Tau
The Astrophysical Journal LettersThe vertical settling of dust grains in a circumstellar disk, characterized by their scale height, is a pivotal process in the formation of planets. This study offers in-depth analysis and modeling of the radial scale height profile of dust grains in the
Haifeng Yang +6 more
doaj +1 more source
Discovery of stars surrounded by iron dust in the LMC
, 2019 We consider a small sample of oxygen-rich, asymptotic giant branch stars in the Large Magellanic Cloud, observed by the Spitzer Space Telescope, exhibiting a peculiar spectral energy distribution, which can be hardly explained by the common assumption ...
Dell'Agli, F. +6 more
core +1 more source