Results 81 to 90 of about 4,364 (222)
A STUDY OF MASS LOSS AND DUST FORMATION NEAR HOT STARS
Odessa Astronomical Publications, 2016 At present dust formation is well studied only near cool stars, whose surface temperatures are close to those of dust sublimation. Hot stars need to supply large amounts of circumstellar material to allow dust formation around them.
K. S. Kuratov +6 more
doaj +1 more source
The deep eclipses of RW Aur revisited by long‐term photometric and spectroscopic monitoring
Astronomische Nachrichten, Volume 345, Issue 4, May 2024.Abstract RW Aurigae is a young stellar system containing a classical T Tauri star as the primary component. It shows deep, irregular dimmings, first detected in 2010. At the University Observatory Jena, we carried out optical follow‐up observations. We performed multiband (BVRI) photometry of the system with the Cassegrain‐Teleskop‐Kamera II and the ...
Oliver Lux +2 more
wiley +1 more source
Characterizing circumstellar disk around young stars [PDF]
, 2010 The circumstellar disks play a fundamental role in star and planet formation process. Studies on circumstellar disks are generally carried on following two viable approaches: "statistical" studies, where a large samples of sources are measured to ...
Schisano, Eugenio
core
Equatorial Enhancement in the Dustiest OH/IR Stars in the Galactic Bulge
The Astrophysical JournalWe have detected the 10 μ m silicate feature and the 11.3 μ m crystalline forsterite feature in absorption in 21 oxygen-rich asymptotic giant branch stars in the Galactic bulge.
Steven R. Goldman +4 more
doaj +1 more source
Penetration of Interstellar Dust Aggregates Into Circumstellar Dust Disks [PDF]
Symposium - International Astronomical Union, 2004 Interstellar dust particles, which are supposedly aggregates, penetrate dust disks around stars because of the star's motion relative to the surrounding interstellar medium (ISM). We discuss the interrelation of the physical properties of local interstellar dust, the relative motion of the star and the surrounding ISM, and the evolution of the ...
Hiroshi Kimura, Ingrid Mann
openaire +1 more source
Limitations of the modified blackbody fit method for determining molecular cloud properties
Astronomische Nachrichten, Volume 345, Issue 4, May 2024.Abstract Achieving a comprehensive understanding of the star and planet formation process is one of the fundamental tasks of astrophysics, requiring detailed knowledge of the physical conditions during the different phases of this process. During the earliest stages, that is, concerning physical processes in molecular clouds and filaments, the column ...
Niko Zielinski, Sebastian Wolf
wiley +1 more source
Circumstellar Dust in Symbiotic Miras during Obscuration Events [PDF]
, 2007 International audienceWe present a study of circumstellar dust properties in the symbiotic Miras RX Pup, V835 Cen, RR Tel and R Aqr, which show obscuration events during the observed time intervals.
Kotnik-Karuza, D. +2 more
core
Dust-evacuated Zones near Massive Stars: Consequences of Dust Dynamics on Star-forming Regions
The Astrophysical JournalStars form within dense cores composed of both gas and dust within molecular clouds. However, despite the crucial role that dust plays in the star formation process, its dynamics is frequently overlooked, with the common assumption being a constant ...
Nadine H. Soliman +2 more
doaj +1 more source
Evidence for Dust Grain Growth in Young Circumstellar Disks [PDF]
Science, 2001 Hundreds of circumstellar disks in the Orion nebula are being rapidly destroyed by the intense ultraviolet radiation produced by nearby bright stars. These young, million-year-old disks may not survive long enough to form planetary systems. Nevertheless, the first stage of planet formation—the growth of dust grains into larger particles—may have begun ...
Throop, Henry B. +3 more
openaire +3 more sources
Isomerism of CH2SO: Accurate structural, energetic, and spectroscopic characterization
Journal of Computational Chemistry, Volume 45, Issue 11, Page 777-786, April 30, 2024.What is the next sulfur‐containing molecule that will be detected in space? Guided by the experimental data on the cis‐/trans‐HC(O)SH conformers, the structural and spectroscopic properties of cis‐/trans‐HC(S)OH have been accurately determined using state‐of‐the‐art quantum‐chemical approaches. Abstract A recent work [Ye et al. Mon. Not. R. Astron. Soc.
Cristina Puzzarini +2 more
wiley +1 more source