Zobrazeno 1 - 10
of 482
pro vyhledávání: '"Sundqvist J"'
Autor:
Hawcroft, C., Mahy, L., Sana, H., Sundqvist, J. O., Abdul-Masih, M., Brands, S. A., Decin, L., deKoter, A., Puls, J.
Publikováno v:
A&A 690, A126 (2024)
We constrain wind parameters of a sample of 18 O-type stars in the LMC, through analysis with stellar atmosphere and wind models including the effects of optically thick clumping. This allows us to determine the most accurate spectroscopic mass-loss
Externí odkaz:
http://arxiv.org/abs/2407.06775
Autor:
Sana, H., Tramper, F., Abdul-Masih, M., Blomme, R., Dsilva, K., Maravelias, G., Martins, L., Mehner, A., Wofford, A., Banyard, G., Barbosa, C. L., Bestenlehner, J., Hawcroft, C., Hillier, D. John, Todt, H., Larkin, C. J. K., Mahy, L., Najarro, F., Ramachandran, V., Ramirez-Tannus, M. C., Rubio-Diez, M. M., Sander, A. A. C., Shenar, T., Vink, J. S., Backs, F., Brands, S. A., Crowther, P., Decin, L., de Koter, A., Hamann, W. -R., Kehrig, C., Kuiper, R., Oskinova, L., Pauli, D., Sundqvist, J., Verhamme, O., collaboration, the XSHOOT-U
Publikováno v:
A&A 688, A104 (2024)
Using the medium resolution spectrograph X-shooter, spectra of 235 OB and Wolf-Rayet (WR) stars in sub-solar metallicity environments have been secured. [...]This second paper focuses on the optical observations of 232 Magellanic Clouds targets. It d
Externí odkaz:
http://arxiv.org/abs/2402.16987
Autor:
Debnath, D., Sundqvist, J. O., Moens, N., Van der Sijpt, C., Verhamme, O., Poniatowski, L. G.
Massive and luminous O-star atmospheres with winds have been studied primarily using one-dimensional (1D), spherically symmetric, and stationary models. However, observations and theory rather suggest that O-star atmospheres are highly structured, tu
Externí odkaz:
http://arxiv.org/abs/2401.08391
Autor:
Hawcroft, C., Sana, H., Mahy, L., Sundqvist, J. O., de Koter, A., Crowther, P. A., Bestenlehner, J. M., Brands, S. A., David-Uraz, A., Decin, L., Erba, C., Garcia, M., Hamann, W. -R., Herrero, A., Ignace, R., Kee, N. D., Kubátová, B., Lefever, R., Moffat, A., Najarro, F., Oskinova, L., Pauli, D., Prinja, R., Puls, J., Sander, A. A. C., Shenar, T., St-Louis, N., ud-Doula, A., Vink, J. S.
Publikováno v:
A&A 688, A105 (2024)
The winds of massive stars have an impact on stellar evolution and on the surrounding medium. The maximum speed reached by these outflows, the terminal wind speed, is a global wind parameter and an essential input for models of stellar atmospheres an
Externí odkaz:
http://arxiv.org/abs/2303.12165
Autor:
Cannon, E., Montargès, M., de Koter, A., Matter, A., Sanchez-Bermudez, J., Norris, R., Paladini, C., Decin, L., Sana, H., Sundqvist, J. O., Lagadec, E., Kervella, P., Chiavassa, A., Dupree, A. K., Perrin, G., Scicluna, P., Stee, P., Kraus, S., Danchi, W., Lopez, B., Millour, F., Drevon, J., Cruzalèbes, P., Berio, P., Robbe-Dubois, S., Rosales-Guzman, A.
Publikováno v:
A&A 675, A46 (2023)
The 'Great Dimming' of the prototypical red supergiant Betelgeuse, which occurred between December 2019 and April 2020, gives us unprecedented insight into the processes occurring on the stellar surface and in the inner wind of this type of star. In
Externí odkaz:
http://arxiv.org/abs/2303.08892
Autor:
Poniatowski, L. G., Kee, N. D., Sundqvist, J. O., Driessen, F. A., Moens, N., Owocki, S. P., Gayley, K. G., Decin, L., de Koter, A., Sana, H.
Publikováno v:
A&A 667, A113 (2022)
In accelerating and supersonic media, the interaction of photons with spectral lines can be of ultimate importance. However, fully accounting for such line forces currently can only be done by specialised codes in 1-D steady-state flows. More general
Externí odkaz:
http://arxiv.org/abs/2204.09981
Publikováno v:
A&A 663, A40 (2022)
Hot, massive (OB) stars experience strong line-driven stellar winds and mass loss. As the majority of efficient driving lines are metallic, the amount of wind driving and mass loss is dependent on the stellar metallicity Z. In addition, line-driven w
Externí odkaz:
http://arxiv.org/abs/2204.05670
Massive stars lose a large fraction of their mass to radiation-driven winds throughout their entire life. These outflows impact both the life and death of these stars and their surroundings. Theoretical mass-loss rates of hot, massive stars are deriv
Externí odkaz:
http://arxiv.org/abs/2203.08218
Publikováno v:
A&A 665, A42 (2022)
Classical Wolf Rayet (WR) stars are direct supernova progenitors undergoing vigorous mass-loss. Understanding the dense and fast outflows of such WR stars is thus crucial for understanding advanced stages of stellar evolution, the dynamical feedback
Externí odkaz:
http://arxiv.org/abs/2203.01108
Autor:
Hennicker, L., Kee, N. D., Shenar, T., Bodensteiner, J., Abdul-Masih, M., Mellah, I. El, Sana, H., Sundqvist, J. O.
Publikováno v:
A&A 660, A17 (2022)
Context: To quantitatively decode the information stored within an observed spectrum, detailed modelling of the physical state and accurate radiative transfer solution schemes are required. In the analysis of stellar spectra, the numerical model ofte
Externí odkaz:
http://arxiv.org/abs/2111.15345