Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Sofie Liljegren"'
Publikováno v:
Proceedings of the International Astronomical Union. 14:134-138
The wind-driving process of AGB stars is thought to be a two-step process: first matter is levitated by shock waves, and then accelerated outwards by radiation pressure on newly condensed dust grains. When modelling such a wind, spherical symmetry is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da72900a7178475ce5f80d70bfe3aa83
https://doi.org/10.1017/s1743921318006117
https://doi.org/10.1017/s1743921318006117
Publikováno v:
Proceedings of the International Astronomical Union. 14:9-18
Local three-dimensional radiation-hydrodynamics simulations of patches of the surfaces of solar-type stars, that are governed by small-scale granular convection, have helped analyzing and interpreting observations for decades. These models contribute
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::241d2bb598bfb47692cfaef8db5a7669
https://doi.org/10.1017/s1743921318006658
https://doi.org/10.1017/s1743921318006658
The atmospheres and winds of C-type AGB stars are modeled with the 1D spherically symmetric radiation-hydrodynamical code DARWIN. To explore the metallicity-dependence of mass loss we calculate model grids at three different chemical abundances. Sinc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd548af008b6c03c4d28098c322431e8
http://arxiv.org/abs/1902.05352
http://arxiv.org/abs/1902.05352
Publikováno v:
Astronomy & Astrophysics. 642:A135
Context. The inclusion of molecular physics is an important piece that tends to be missing from the puzzle when modeling the spectra of supernovae (SNe). Molecules have both a direct impact on the spectra, particularly in the infrared, and an indirec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::937b5238e5260b725df0385ed0e36491
https://doi.org/10.1051/0004-6361/202038116
https://doi.org/10.1051/0004-6361/202038116
The symbiotic star R Aqr is part of a small sample of binary AGB stars observed with ALMA. The sample stars are: R Aqr, Mira, W Aql, and pi1 Gru. The sample covers a range in binary separation and wind properties, where R Aqr is the source with the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d3bd9785c4b5fa253af0cd77edc1195
http://arxiv.org/abs/1806.04979
http://arxiv.org/abs/1806.04979
The wind-driving mechanism of asymptotic giant branch (AGB) stars is commonly attributed to a two-step process: first, gas in the stellar atmosphere is levitated by shockwaves caused by stellar pulsation, then accelerated outwards by radiative pressu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f77b8c05ebf44ee34f0519ed8e7b2a9
Wind-driving in asymptotic giant branch (AGB) stars is commonly attributed to a two-step process. First, matter in the stellar atmosphere is levitated by shock waves, induced by stellar pulsation, and second, this matter is accelerated by radiation p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a598b366037a1c26e379bea946b0974
http://arxiv.org/abs/1706.08332
http://arxiv.org/abs/1706.08332
Context: Observations of asymptotic giant branch (AGB) stars with increasing spatial resolution reveal new layers of complexity of atmospheric processes on a variety of scales. Aim: To analyze the physical mechanisms that cause asymmetries and surfac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::146d5ef8ebb04af28b41805502e1e2cb
http://arxiv.org/abs/1702.05433
http://arxiv.org/abs/1702.05433
Publikováno v:
Astronomy & Astrophysics. 626:A100
The purpose of this work is to present an extensive grid of dynamical atmosphere and wind models for M-type AGB stars, covering a wide range of relevant stellar parameters. We used the DARWIN code, which includes frequency-dependent radiation-hydrody
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36c143f6823db5821d7de57abfd5d738
https://doi.org/10.1051/0004-6361/201935366
https://doi.org/10.1051/0004-6361/201935366
Winds of AGB stars are thought to be driven by a combination of pulsation-induced shock waves and radiation pressure on dust. In dynamic atmosphere and wind models, the stellar pulsation is often simulated by prescribing a simple sinusoidal variation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::220166d61a2e2c4b0b125aafac195773