Results 121 to 130 of about 1,537 (221)

BEYOND IRC+10216: NEW TRENDS IN THE DETECTION OF METAL MOLECULES TOWARDS CIRCUMSTELLAR ENVELOPES

, 2003
Author Institution: Department of Chemistry, Department of Astronomy, Steward Observatory, and Arizona Radio Observatory, University of ArizonaNew millimeter-wave observations towards the circumstellar envelopes of several late-type carbon stars have ...
Highberger, J. L., Ziurys, L. M.
core  

Circumstellar disks of the most vigorously accreting young stars

, 2016
Subaru-HiCIAO observations on FU Orionis objects revealed asymmetric structures on 10 2 to 10 3 AU scales of circumstellar disks and envelopes.
Eduard I. Vorobyov, Tae-Soo Pyo, Hauyu Baobab Liu, Toru Tsuribe, Jun Hashimoto, Nobuhiko Kusakabe, Jennifer L. Karr, Tomoyuki Kudo, Thomas Henning, Motohide Tamura, Misato Fukagawa, Michael M. Dunham, Ruobing Dong, Michihiro Takami   +13 more
core   +1 more source

IR emission from circumstellar envelopes of C-rich stars

, 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  

Hydrodynamic Simulations of Circumstellar Envelopes under the Gravitational Influence of a Wide Binary Companion: Comparison Between Circular and Elliptical Orbits [PDF]

, 2019
Shapes of circumstellar envelopes around mass losing stars contain information of the very inner region of the envelope where mass loss process takes place.
Bao, Nguyen Thi Thanh, Hung, Tran Ngoc, Hai, Bui Van, Dinh, Trung Van, Bang, Pham Dong   +4 more
core  

Silicate features in the circumstellar envelopes of the Class I binary driving source of HH 250

, 2019
Context. The silicate feature near 10 μm is one of the main tools available to study the mineralogy of circumstellar disks and envelopes, providing information on the thermal processing, growth, location, and circulation of dust grains. Aims.
F. Comerón, B. Merín, B. Reipurth, H.-W. Yen   +3 more
core   +1 more source

Review: A Search For Diffuse Bands In The Circumstellar Envelopes Of Post-AGB Stars

, 2008
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.
D. A. García Hernández, Hernández, D. A. García., Lario, P. G., R. Luna, Satorre, M. A., Suarez, O., P. García Lario, M. A. Satorre, N. L. J. Cox, Luna, R., Cox, N. L. J., O. Suárez   +11 more
core   +1 more source

Sulphur molecules in the circumstellar envelopes of M-type AGB stars

, 2016
Aims. The sulphur compounds SO and SO2 have not been widely studied in the circumstellar envelopes of asymptotic giant branch (AGB) stars. By presenting and modelling a large number of SO and SO2 lines in the low mass-loss rate M-type AGB star R Dor, and
H. Olofsson, K. Justtanont, Olofsson, Hans, T. Danilovich, Danilovich, Taissa, Justtanont, Kay, Olofsson, Hans,, E. De Beck, Black, John H,, Danilovich, Taissa,, Black, John H, De Beck, Elvire,, Justtanont, Kay,, De Beck, Elvire, J. H. Black   +14 more
core   +1 more source

Calcium Chemistry in Carbon-rich Circumstellar Environments: The Laboratory and Astronomical Discovery of Calcium Dicarbide, CaC2

The Astrophysical Journal Letters
Calcium dicarbide, CaC _2 , has been characterized at high resolution in the laboratory, and its main isotopologue, ^40 CaC _2 , has been assigned to 14 rotational emission lines between 14 and 115 GHz, including 12 previously unassigned lines, in the ...
H. Gupta, P. B. Changala, J. Cernicharo, J. R. Pardo, M. Agúndez, C. Cabezas, B. Tercero, M. Guélin, M. C. McCarthy   +8 more
doaj   +1 more source

Helium-induced rotational (de-)excitation of interstellar rhomboidal silicon tricarbide (c-SiC3)

Astronomy & Astrophysics
Silicon carbide molecules are key tracers of dust formation and molecular evolution in carbon-rich circumstellar environments, yet their collisional excitation remains largely unexplored.
Mehnen Bilel
doaj   +1 more source

Disk in the Circumstellar Envelope of Carbon Mira V Cygni

The Astronomical Journal
Asymptotic giant branch (AGB) stars are the primary source of dust and complex molecules in the interstellar medium. The determination of outflow parameters is often hindered by the unknown geometry of the circumstellar environment, creating a demand for
Boris S. Safonov, Sergey G. Zheltoukhov, Andrey M. Tatarnikov, Ivan A. Strakhov, Victor I. Shenavrin   +4 more
doaj   +1 more source