Zobrazeno 1 - 10
of 262
pro vyhledávání: '"Bjorkman, J."'
Autor:
Ignace, R, Bjorkman, J E, Chene, A-N, Erba, C, Fabiani, L, Moffat, A F J, Sincennes, R, St-Louis, N
Massive star winds are structured both stochastically ("clumps") and often coherently (Co-rotation Interaction Regions, or CIRs). Evidence for CIRs threading the winds of Wolf-Rayet (WR) stars arises from multiple diagnostics including linear polarim
Externí odkaz:
http://arxiv.org/abs/2309.10599
Autor:
Klement, Robert, Carciofi, A. C., Rivinius, T., Ignace, R., Matthews, L. D., Torstensson, K., Gies, D., Vieira, R. G., Richardson, N. D., de Souza, A. Domiciano, Bjorkman, J. E., Hallinan, G., Faes, D. M., Mota, B., Gullingsrud, A. D., de Breuck, C., Kervella, P., Curé, M., Gunawan, D.
Publikováno v:
2019ApJ...885..147K
Rapid rotation is a fundamental characteristic of classical Be stars and a crucial property allowing for the formation of their circumstellar disks. Past evolution in a mass and angular momentum transferring binary system offers a plausible solution
Externí odkaz:
http://arxiv.org/abs/1909.12413
Autor:
Ghoreyshi, M. R., Carciofi, A. C., Rimulo, L. R., Vieira, R. G., Faes, D. M., Baade, D., Bjorkman, J. E., Otero, S., Rivinius, Th.
We analyzed V-band photometry of the Be star {\omega} CMa, obtained during the last four decades, during which the star went through four complete cycles of disc formation and dissipation. The data were simulated by hydrodynamic models based on a tim
Externí odkaz:
http://arxiv.org/abs/1806.04301
Autor:
Klement, R., Carciofi, A. C., Rivinius, T., Matthews, L. D., Vieira, R. G., Ignace, R., Bjorkman, J. E., Mota, B. C., Faes, D. M., Bratcher, A. D., Curé, M., Štefl, S.
Publikováno v:
A&A 601, A74 (2017)
Context. The structure of the inner parts of Be star disks (20 stellar radii) is well explained by the viscous decretion disk (VDD) model, which is able to reproduce the observable properties of most of the objects studied so far. The outer parts, on
Externí odkaz:
http://arxiv.org/abs/1703.07321
Autor:
Dulaney, Nick, Richardson, Noel D., Gerhartz, Cody J., Bjorkman, J. E., Bjorkman, K. S., Carciofi, Alex C., Klement, Robert, Wang, Luqian, Morrison, Nancy D., Bratcher, Allison D., Greco, Jennifer J., Hardegree-Ullman, Kevin K., Lembryk, Ludwik, Oswald, Wayne L., Trucks, Jesica L.
The late-type Be star $\beta$ CMi is remarkably stable compared to other Be stars that have been studied. This has led to a realistic model of the outflowing Be disk by Klement et al. These results showed that the disk is likely truncated at a finite
Externí odkaz:
http://arxiv.org/abs/1701.05201
Autor:
Labadie-Bartz, Jonathan, Pepper, Joshua, McSwain, M. Virginia, Bjorkman, J. E., Bjorkman, K. S., Lund, Michael B., Rodriguez, Joseph E., Stassun, Keivan G., Stevens, Daniel J., Gaudi, B. Scott, James, David J., Kuhn, Rudolf B., Siverd, Robert J., Beatty, Thomas G.
Be stars have generally been characterized by the emission lines in their spectra, and especially the time variability of those spectroscopic features. They are known to also exhibit photometric variability at multiple timescales, but have not been b
Externí odkaz:
http://arxiv.org/abs/1609.08449
Autor:
Klement, R., Carciofi, A. C., Rivinius, T., Panoglou, D., Vieira, R. G., Bjorkman, J. E., Štefl, S., Tycner, C., Faes, D. M., Korčáková, D., Müller, A., Zavala, R. T., Curé, M.
Publikováno v:
A&A 584, A85 (2015)
The viscous decretion disk (VDD) model is able to explain most of the currently observable properties of the circumstellar disks of Be stars. However, more stringent tests, focusing on reproducing multitechnique observations of individual targets via
Externí odkaz:
http://arxiv.org/abs/1510.01229
Autor:
Ghoreyshi, M. R., Carciofi, A. C., Rimulo, L. R., Otero, S., Baade, D., Bjorkman, J. E., Okazaki, A. T., Rivinius, Th.
We have used the radiative transfer code HDUST to analyze and interpret the long-term photometric behavior of the Be star omega CMa, considering four complete cycles of disk formation and dissipation. This is the first time in which a full lightcurve
Externí odkaz:
http://arxiv.org/abs/1506.08902
Autor:
Whitney, B. A., Robitaille, T. P., Bjorkman, J. E., Dong, R., Wolff, M. J., Wood, K., Honor, J.
We have updated our publicly available dust radiative transfer code (HOCHUNK3D) to include new emission processes and various 3-D geometries appropriate for forming stars. The 3-D geometries include warps and spirals in disks, accretion hotspots on t
Externí odkaz:
http://arxiv.org/abs/1307.0561
Autor:
Thomas, Joshua D., Witt, Adolf N., Aufdenberg, Jason P., Bjorkman, J. E., Dahlstrom, Julie A., Hobbs, L. M., York, Donald G.
In this paper we analyse a set of 33 optical spectra, which were acquired with the ARCES echelle spectrograph (R = 38,000) on the 3.5-m telescope at the Apache Point Observatory. We examine the H{\alpha} profile in each of these observations in order
Externí odkaz:
http://arxiv.org/abs/1212.5735