Results 151 to 160 of about 386,435 (271)

Circumstellar molecular line emission from S-type AGB stars: Mass-loss rates and SiO abundances

open access: yes, 2009
The main aim is to derive reliable mass-loss rates and circumstellar SiO abundances for a sample of 40 S-type AGB stars based on new multi-transitional CO and SiO radio line observations.
Bieging   +52 more
core   +1 more source

86th Annual Meeting of the Meteoritical Society (2024)

open access: yes
Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley   +1 more source

Probing Dust and Gas Properties Using Ringed Disks

open access: yesThe 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

Resolution and calibration effects in high contrast polarimetric imaging of circumstellar scattering regions

open access: yesAstronomy & Astrophysics
Context. Many circumstellar dust scattering regions have been detected and investigated with polarimetric imaging. However, the quantitative determination of the intrinsic polarization and of dust properties is difficult because of complex observational ...
Schmid H. M., Ma J.
doaj   +1 more source

Discovery of stars surrounded by iron dust in the LMC

open access: yes, 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

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

open access: yesThe 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   +8 more
doaj   +1 more source

Gas phase atomic metals in the circumstellar envelope of IRC+10216

open access: yes, 2010
We report the results of a search for gas phase atomic metals in the circumstellar envelope of the AGB carbon star IRC+10216. The search was made using high resolution (R=50000) optical absorption spectroscopy of a backgound star that probes the envelope
Chaffee   +46 more
core   +1 more source

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

open access: yesEur Phys J Plus, 2023
Zagaria F   +3 more
europepmc   +1 more source

A search for diffuse bands in the circumstellar envelopes of post-AGB stars

open access: yes, 2007
In this work we present the results of a systematic search for diffuse bands (DBs, hereafter) in the circumstellar envelopes of a carefully selected sample of post-AGB stars.
Allamandola   +106 more
core   +2 more sources

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