Results 1 to 10 of about 772 (182)

Late-time evolution of the interacting stripped-envelope supernova 2017dio

Astronomy & Astrophysics
The discovery of stripped-envelope core-collapse supernovae (SNe) interacting with dense circumstellar medium (CSM) challenges our current understanding of massive star evolution.
Humina C., Gutiérrez C. P., Kuncarayakti H., Nagao T., González-Gaitán S., Kangas T., Kravtsov T., Maeda K., Mattila S., Reynolds T. M., Tartaglia L., Benetti S., Fraser M., Gall C., Lundqvist P., Morales-Garoffolo A., Stritzinger M.   +16 more
doaj   +1 more source

Hα Emission among Evolved FGKM Stars: A Compendium from the Literature

The Astronomical Journal
Emission in the wings of the H α line among late-type giant stars occurs as a consequence of conditions in their chromospheres. Data from the literature have been used to document the incidence of H α emission among Population I giant stars as a function
Graeme H. Smith
doaj   +1 more source

Ring-gap Structures in the Class I Circumstellar Disk of CrA IRS 2 Associated with the Magnetic Flux-driven Bubble

The Astrophysical Journal
Recent Atacama Large Millimeter/submillimeter Array (ALMA) observations with 0 $\mathop{.}\limits^{^{\prime\prime} }$ 1 resolution have revealed characteristic substructures in circumstellar disks around young Class I sources, providing clues to the ...
Ayumu Shoshi, Masayuki Yamaguchi, Mitsuki Omura, Kazuki Tokuda, Naofumi Fukaya, Kengo Tachihara, Masahiro N. Machida   +6 more
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Dust distribution in circumstellar disks harboring multi-planet systems

Astronomy & Astrophysics
Context. Theoretical formation models and exoplanet detection surveys indicate that systems with multiple giant planets are common. Aims. We investigate how multiple super-thermal-mass planets embedded in a circumstellar disk shape the dust distribution ...
Roatti V., Picogna G., Marzari F.
doaj   +1 more source

Deep Search for a Scattered Light Dust Halo Around Vega with the Hubble Space Telescope

The Astronomical Journal
We present a provisory scattered-light detection of the Vega debris disk using deep Hubble Space Telescope (HST) coronagraphy (PID 16666). At only 7.7 pc, Vega is immensely important in debris disk studies both for its prominence and also because it ...
Schuyler G. Wolff, András Gáspár, George H. Rieke, Jarron M. Leisenring, Kate Su, David J. Wilner, Luca Matrà, Marie Ygouf, Nicholas P. Ballering   +8 more
doaj   +1 more source

Azimuthal Dust Polarization from Aerodynamically Aligned Grains as Evidence for the Streaming Instability in Protoplanetary Disks

The Astrophysical Journal
(Sub)millimeter dust polarization in protoplanetary disks has revealed the presence of large (∼100  μ m) dust grains that are aligned along their long axis following the azimuthal direction of the disk.
Zhe-Yu Daniel Lin, Jeonghoon Lim, Jacob B. Simon, Zhi-Yun Li, Daniel Carrera, Manuel Fernández-López, Rachel Harrison, Rixin Li, Leslie W. Looney, Ian W. Stephens, Haifeng Yang   +10 more
doaj   +1 more source

Probing Dust and Gas Properties Using Ringed Disks

The Astrophysical Journal Letters
How rapidly a planet grows in mass and how far it may park from the host star depend sensitively on two nondimensional parameters: Stokes number St and turbulent α .
Eve J. Lee
doaj   +1 more source

Dust dynamics in planet-forming discs in binary systems. [PDF]

Eur Phys J Plus, 2023
Zagaria F, Rosotti GP, Alexander RD, Clarke CJ.   +3 more
europepmc   +1 more source

Long-period Variable Stars in NGC 147 and NGC 185. II. Their Dust Production

The Astrophysical Journal
This study presents a comparative analysis of mass-loss and dust production rates in the dwarf galaxies NGC 147 and NGC 185, focusing on long-period variables (LPVs) and pulsating asymptotic giant branch stars as primary indicators of dust feedback into ...
Hamidreza Mahani, Atefeh Javadi, Jacco Th. van Loon, Francisca Kemper, Roya Hamedani Golshan, Iain McDonald, Habib G. Khosroshahi, Hedieh Abdollahi, Sajjad Mahdizadeh   +8 more
doaj   +1 more source

Two Decades of Dust Evolution in SN 2005af through JWST, Spitzer, and Chemical Modeling

The Astrophysical Journal
The evolution of dust in core-collapse supernovae (SNe), in general, is poorly constrained owing to a lack of infrared observations a few years after explosion. Most theories of dust formation in SNe heavily rely only on SN 1987A.
Arkaprabha Sarangi, Szanna Zsíros, Tamás Szalai, Laureano Martinez, Melissa Shahbandeh, Ori D. Fox, Schuyler D. Van Dyk, Alexei V. Filippenko, Melina Cecilia Bersten, Ilse De Looze, Chris Ashall, Tea Temim, Jacob E. Jencson, Armin Rest, Dan Milisavljevic, Luc Dessart, Eli Dwek, Nathan Smith, Samaporn Tinyanont, Thomas G. Brink, WeiKang Zheng, Geoffrey C. Clayton, Jennifer Andrews   +22 more
doaj   +1 more source