Results 31 to 40 of about 3,177 (205)
Dust Rings in the Circumstellar Gas Disks [PDF]
Symposium - International Astronomical Union, 2004 In optically thin gas disks around young Vega-type stars, dust grains are exposed to the stellar radiation pressure and gas drag force. The combination of these forces pushes the grains away from the central star. Typically, 10–100 μm grains migrate outward to become concentrated at the outer edge of the gas disk.
Taku Takeuchi, Pawel Artymowicz
openaire +1 more source
Infrared Spectroscopy of U Equulei’s Warm Circumstellar Gas [PDF]
The Astrophysical Journal, 2005 21 pages incl.
Geballe, T. R. +3 more
openaire +2 more sources
Debris Disks around Nearby Stars with Circumstellar Gas [PDF]
The Astrophysical Journal, 2008 10 pages including 4 figures.
Roberge, Aki, Weinberger, Alycia J.
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Disk evolution, element abundances and cloud properties of young gas giant planets [PDF]
, 2014 ChHc and PBR highlights financial support of the European Community under the FP7 program by an ERC starting grant. PW, IK, and WFT acknowledge funding from the European Union Seventh Framework Programme FP7-2011 under grant agreement No.
Kamp, I. +19 more
core +1 more source
Extreme Carbon Overabundance in the 49 Ceti Circumstellar Gas [PDF]
, 2015 We present analysis of C and O absorption in high-resolution HST-STIS FUV spectra of the nearby A1V star 49 Ceti. This disk system is one of the few showing the dust properties of a debris disk, but harboring relatively abundant molecular gas more ...
Roberge, Aki +5 more
core +4 more sources
Millimetre Observations of Maser-Emitting Planetary Nebulae
Galaxies, 2022 Observations in the millimetre bands of maser-emitting planetary nebulae (PNe) are crucial to study their circumstellar molecular gas at the beginning of the PN phase.
Lucero Uscanga +9 more
doaj +1 more source
Numerical modeling of gravitational instability outcomes in multiphase circumstellar discs
EPJ Web of Conferences, 2013 To suggest consistent route toward planetesimal and planetary core formation in circumstellar discs we study gravitational instability outcomes in massive multiphase (gas-collisionless bodies) disc.
Snytnikov Valeriy N. +1 more
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SPECTROSCOPIC MONITORING OF THE B[E] OBJECTS FSCMA AND MOCAM
Odessa Astronomical Publications, 2019 Objects with the B[e] phenomenon exhibit permitted and forbidden emission lines due to the presence of circumstellar ionized gas and large infrared excesses due to processing of the stellar radiation by circumstellar dust.
A. K. Kuratova +10 more
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Evolution of Gas and Dust in Circumstellar Disks [PDF]
Symposium - International Astronomical Union, 2000 A clear understanding of the chemical processing of matter as it is transferred from a molecular cloud to a planetary system depends heavily on the physical conditions endured by gas and dust as these accrete onto a disk and are incorporated into planetary bodies.
openaire +2 more sources
THE SPECTROSCOPY OF THE PULSATING CARBON STAR R Lep
Odessa Astronomical Publications, 2017 The first results of detailed spectroscopy are presented for carbon Mira R Leporis. This long-period variable is undergoing deep fadings, apparently caused by dust formation around the star.
L. Zacs, O. Alksnis
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