Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Susanne Höfner"'
Autor:
M. Andriantsaralaza, Raghvendra Sahai, Taissa Danilovich, Sofia Ramstedt, Hans Olofsson, Martin Groenewegen, Maryam Saberi, Susanne Höfner, Franz Kerschbaum, E. De Beck, Albert A. Zijlstra, Matthias Maercker, Theo Khouri, G. Quintana-Lacaci, Wouter Vlemmings, Michael Lindqvist
Publikováno v:
Astronomy and Astrophysics
Digital.CSIC. Repositorio Institucional del CSIC
instname
Digital.CSIC. Repositorio Institucional del CSIC
instname
25 pags., 15 figs., 4 tabs.
Aims. We aim to constrain the sizes of, and investigate deviations from spherical symmetry in, the CO circumstellar envelopes (CSEs) of 16 S-type stars, along with an additional 7 and 4 CSEs of C-type and M-type AGB s
Aims. We aim to constrain the sizes of, and investigate deviations from spherical symmetry in, the CO circumstellar envelopes (CSEs) of 16 S-type stars, along with an additional 7 and 4 CSEs of C-type and M-type AGB s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::445b75147d15391af3190794b4d381a0
https://lirias.kuleuven.be/handle/123456789/682658
https://lirias.kuleuven.be/handle/123456789/682658
Autor:
Matthias Maercker, Franz Kerschbaum, Martin Groenewegen, Hans Olofsson, Susanne Höfner, Daniel Tafoya, L. Doan, Rodolfo Montez, Theo Khouri, Taissa Danilovich, Wouter Vlemmings, E. De Beck, Raghvendra Sahai, Albert A. Zijlstra, Sofia Ramstedt, G. Quintana-Lacaci, Maryam Saberi, Michael Lindqvist, Joel H. Kastner
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
28 pags., 10 figs., 7 tabs.
Context. This is the first publication from the DEATHSTAR project. The overall goal of the project is to reduce the uncertainties of the observational estimates of mass-loss rates from evolved stars on the Asymptotic
Context. This is the first publication from the DEATHSTAR project. The overall goal of the project is to reduce the uncertainties of the observational estimates of mass-loss rates from evolved stars on the Asymptotic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcd50482661c701840561fecf9cc9d5f
http://hdl.handle.net/10261/224210
http://hdl.handle.net/10261/224210
Autor:
J. C. Guirado, B. Freytag, Andrea Chiavassa, Xavier Haubois, Susanne Höfner, Fabien Baron, Julien Woillez, J. B. Climent, Markus Wittkowski, J. M. Marcaide
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, In press
Astronomy and Astrophysics-A&A, EDP Sciences, In press
Context. Red supergiant stars possess surface features and extended molecular atmospheres. Photospheric convection may be a crucial factor of the levitation of the outer atmospheric layers. However, the mechanism responsible is still poorly understoo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16db71df6971061231d6e38b8293dc95
https://hal.archives-ouvertes.fr/hal-02491200
https://hal.archives-ouvertes.fr/hal-02491200
Publikováno v:
Astronomy and Astrophysics
The winds observed around AGB stars are generally attributed to radiation pressure on dust formed in the dynamical atmospheres of these long-period variables. The composition of wind-driving grains is affected by a feedback between their optical prop
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
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
Publikováno v:
Proceedings of the International Astronomical Union. 14:391-393
We have improved the treatment of dust opacity from the small-particle limit approximation to size-dependent which leads to models with smaller grains, lower dust-to-gas ratios, but about the same mass-loss rates and outflow velocities. The K-magnitu
Autor:
Susanne Höfner, B. Freytag
Dust grains forming in the extended atmospheres of AGB stars are critical for the heavy mass loss of these cool luminous giants, as they provide radiative acceleration for the stellar winds. Characteristic mid-IR spectral features indicate that the g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::394f6a1c6a773f0575bf50275b1f7984
Autor:
Bernhard Aringer, Giada Pastorelli, Léo Girardi, Martha L. Boyer, Peter R. Wood, Julianne J. Dalcanton, Yang Chen, S. Bladh, Philip Rosenfield, Susanne Höfner, Josefina Montalbán, Maria-Rosa L. Cioni, Martin Groenewegen, Alessandro Bressan, S. Rubele, Paola Marigo, Ambra Nanni, Michele Trabucchi, Kjell Eriksson, Thomas Lebzelter
Publikováno v:
Monthly Notices of the Royal Astronomical Society
The thermally-pulsing asymptotic giant branch (TP-AGB) experienced by low- and intermediate-mass stars is one of the most uncertain phases of stellar evolution and the models need to be calibrated with the aid of observations. To this purpose, we cou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3af13a2841a67faf18f9007ab1d19e3
http://hdl.handle.net/20.500.11767/108185
http://hdl.handle.net/20.500.11767/108185
Autor:
Susanne Höfner, Hans Olofsson
As low- and intermediate-mass stars reach the asymptotic giant branch (AGB), they have developed into intriguing and complex objects that are major players in the cosmic gas/dust cycle. At this stage, their appearance and evolution are strongly affec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b664b3f35b40afc75124cfe36eb23a95
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-347107
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-347107