Results 91 to 100 of about 55,649 (206)

IR emission from circumstellar envelopes of C-rich stars [PDF]

, 1989
The reliability of a theoretical model that solves the radiative transfer equation in dust clouds surrounding a central star is checked. In particular, it is found that both classical scattering by dust and the back-heating effects are negligible in the ...
Colangeli, Luigi, Fonti, Sergio, Orofino, Vincenso, Bussoletti, E., Blanco, A., Borghesi, A.   +5 more
core  

Discontinuous Galerkin finite element method for the continuum radiative transfer problem inside axis-symmetric circumstellar envelopes [PDF]

International audienceContext. The study of the continuum radiative transfer problem inside circumstellar envelopes is both a theoretical and numerical challenge, especially in the frequency-dependent and multi-dimensional case. While approximate methods
Faurobert, Marianne, Faurobert, M., Niccolini, Gilles, M. Faurobert, G. Niccolini, J. Perdigon, Perdigon, J., Niccolini, G., Perdigon, Jérémy   +8 more
core   +1 more source

The dusty envelopes of asymptotic giant branch stars with ultraviolet excesses

Astronomy & Astrophysics
Context. Roughly spherical envelopes around asymptotic giant branch (AGB) stars transform into the highly asymmetric morphologies observed in planetary nebulae.
Alonso-Hernández J., Sánchez Contreras C., Sahai R., Sanz-Forcada J.   +3 more
doaj   +1 more source

Protostellar Chimney Flues: Are Jets and Outflows Lifting Submillimeter Dust Grains from Disks into Envelopes?

The Astrophysical Journal
Low dust opacity spectral indices ( β < 1) measured in the inner envelopes of class 0/I young stellar objects (age ∼10 ^4–5 yr) have been interpreted as the presence of (sub-)millimeter dust grains in these environments.
L. Cacciapuoti, L. Testi, L. Podio, C. Codella, A. J. Maury, M. De Simone, P. Hennebelle, U. Lebreuilly, R. S. Klessen, S. Molinari   +9 more
doaj   +1 more source

Systematic Search for Water Fountain Candidates Using the Databases of Circumstellar Maser Sources

The Astrophysical Journal Supplement Series
Water fountains (WFs) are thought to be objects in the morphological evolution of the circumstellar envelopes of low- and intermediate-mass evolved stars, transitioning from spherically symmetric to asymmetric shapes.
Haichen Fan, Jun-ichi Nakashima, D. Engels, Yong Zhang, Jian-Jie Qiu, Huan-Xue Feng, Jia-Yong Xie, Hiroshi Imai, Chih-Hao Hsia   +8 more
doaj   +1 more source

Observational astrochemistry: The quest for interstellar molecules

EPJ Web of Conferences, 2012
Over 160 molecular species, not counting isotopologues, have been identified in circumstellar envelopes and interstellar clouds. These species have revealed a wealth of familiar, as much as exotic molecules and in complex organic (and silicon) compounds,
Guélin M.
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

EYEGLASS ENVELOPES PTY. LTD.

, 1919
This record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete.
Eyeglass Envelopes Pty Ltd
core  

Properties of Carbon-rich Asymptotic Giant Branch Stars in the LMC and the Milky Way

The Astrophysical Journal
We present a comparative study of carbon-rich asymptotic giant branch (CAGB) stars in the Large Magellanic Cloud (LMC; 7347 stars) and the Milky Way (7163 stars) using infrared color–magnitude diagrams, spectral energy distributions (SEDs), two-color ...
Kyung-Won Suh
doaj   +1 more source

Red and Yellow Hypergiants

Galaxies
The red and yellow hypergiants are a rare and important phase in the evolution of the most massive stars that can reach the cool part of the HR Diagram.
Terry Jones
doaj   +1 more source