Zobrazeno 1 - 10
of 819
pro vyhledávání: '"Vorobyov, E. I."'
The thermal instability of accretion disks is widely used to explain the activity of cataclysmic variables, but its development in protoplanetary disks has been studied in less detail. We present a semi-analytical stationary model for calculating the
Externí odkaz:
http://arxiv.org/abs/2307.15544
Autor:
Gehrig, L., Vorobyov, E. I.
Publikováno v:
A&A 673, A54 (2023)
We compute the evolution and rotational periods of young stars, using the MESA code, starting from a stellar seed, and take protostellar accretion, stellar winds, and the magnetic star-disk interaction into account. Furthermore, we add a certain frac
Externí odkaz:
http://arxiv.org/abs/2303.11672
Publikováno v:
A&A 669, A84 (2023)
The effects of an accretion disk are crucial to understanding the evolution of young stars. During the combined evolution, stellar and disk parameters influence each other, motivating a combined stellar and disk model. This makes a combined numerical
Externí odkaz:
http://arxiv.org/abs/2211.05331
Autor:
Meyer, D. M. -A., Vorobyov, E. I., Elbakyan, V. G., Kraus, S., Liu, S. -Y., Nayakshin, S., Sobolev, A. M.
The burst mode of accretion in massive star formation is a scenario linking the initial gravitational collapse of parent pre-stellar cores to the properties of their gravitationally unstable discs and of their accretion-driven bursts. In this study,
Externí odkaz:
http://arxiv.org/abs/2210.09662
Autor:
Steiner, D., Gehrig, L., Ratschiner, B. W., Ragossnig, F., Vorobyov, E. I., Güdel, M., Dorfi, E. A.
Publikováno v:
A&A 655, A110 (2021)
We conduct simulations of the inner regions of protoplanetary disks (PPDs) to investigate the effects of protostellar magnetic fields on their long-term evolution. We use an inner boundary model that incorporates the influence of a stellar magnetic f
Externí odkaz:
http://arxiv.org/abs/2109.08919
Publikováno v:
A&A 654, A36 (2021)
Context: The pre-main sequence evolution is often simplified by choosing classical initial models. These have large initial radii and sufficient uniform contraction to make them fully convective. Contrary to that, real stars are born as small protost
Externí odkaz:
http://arxiv.org/abs/2107.07568
Autor:
Kóspál, Á., de Miera, F. Cruz-Sáenz, White, J. A., Ábrahám, P., Chen, L., Csengeri, T., Dong, R., Dunham, M. M., Fehér, O., Green, J. D., Hashimoto, J., Henning, Th., Hogerheijde, M., Kudo, T., Liu, H. B., Takami, M., Vorobyov, E. I.
FU Orionis-type objects (FUors) are low-mass pre-main sequence stars undergoing a temporary, but significant increase of mass accretion rate from the circumstellar disk onto the protostar. It is not yet clear what triggers the accretion bursts and wh
Externí odkaz:
http://arxiv.org/abs/2106.14409
Publikováno v:
Astron. Rep. 65, 170-183 (2021)
The topic of the present study is combining a dynamic model of a protoplanetary disk with the computations of radiation transfer for obtaining synthetic spectra and disk images suitable for immediate comparison of the model with observations. Evoluti
Externí odkaz:
http://arxiv.org/abs/2104.10787
Autor:
Meyer, D. M. -A., Vorobyov, E. I., Elbakyan, V. G., Eisloeffel, J., Sobolev, A. M., Stoehr, M.
It is now a widely held view that, in their formation and early evolution, stars build up mass in bursts. The burst mode of star formation scenario proposes that the stars grow in mass via episodic accretion of fragments migrating from their gravitat
Externí odkaz:
http://arxiv.org/abs/2011.05017
Autor:
White, Jacob Aaron, Kóspál, Á., Hughes, A. G., Ábrahám, P., Akimkin, V., Banzatti, A., Chen, L., de Miera, F. Cruz-Sáenz, Dutrey, A., Flock, M., Guilloteau, S., Hales, A. S., Henning, T., Kadam, K., Semenov, D., Sicilia-Aguilar, A., Teague, R., Vorobyov, E. I.
Extreme outbursts in young stars may be a common stage of pre-main-sequence stellar evolution. These outbursts, caused by enhanced accretion and accompanied by increased luminosity, can also strongly impact the evolution of the circumstellar environm
Externí odkaz:
http://arxiv.org/abs/2009.14216