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| DOI | 10.3847/1538-4357/ABDD1E | ||||
| Año | 2021 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
The observed emission lines of Be stars originate from a circumstellar Keplerian disk, which is generally well explained by the viscous decretion disk model. In an earlier work we performed modeling of the full light curve of the bright Be star omega CMa with the 1D time-dependent hydrodynamic code SINGLEBE and the Monte Carlo radiative transfer code HDUST. We used a V-band light curve that probes the inner disk through four disk formation and dissipation cycles. This new study compares predictions of the same set of model parameters with time-resolved photometry from the near-UV through the mid-IR, comprehensive series of optical spectra, and optical broadband polarimetry, which overall represent a larger volume of the disk. Qualitatively, the models reproduce the trends in the observed data due to the growth and decay of the disk. However, quantitative differences exist, e.g., an overprediction of flux increasing with wavelength, too slow decreases in Balmer emission line strength during disk dissipation, and a discrepancy between the range of polarimetric data and the model. We find that a larger value of the viscosity parameter alone or a disk truncated by a companion star reduces these discrepancies by increasing the dissipation rate in the outer regions of the disk.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Ghoreyshi, Mohammad R. | Hombre |
Western Univ - Canadá
UNIV SAO PAULO - Brasil The University of Western Ontario - Canadá Universidade de São Paulo - Brasil Western University - Canadá |
| 2 | Carciofi, Alex C. | Hombre |
UNIV SAO PAULO - Brasil
|
| 3 | Jones, C. E. | Mujer |
Western Univ - Canadá
The University of Western Ontario - Canadá Western University - Canadá |
| 4 | Faes, Daniel M. | Hombre |
NSFs NOIRLab - Estados Unidos
Gemini Observatory - Estados Unidos NOIRLab - Estados Unidos |
| 5 | Baade, D. | Hombre |
Observatorio Europeo Austral - Alemania
|
| 6 | Rivinius, Th | Hombre |
Observatorio Europeo Austral - Chile
European Southern Observatory Santiago - Chile Observatorio Europeo Austral - Alemania |
| Fuente |
|---|
| CNPq |
| FAPESP |
| NASA |
| Natural Sciences and Engineering Research Council of Canada |
| NASA Office of Space Science |
| Brazilian agency FAPESP |
| European Organization for Astronomical Research in the Southern Hemisphere under ESO programs |
| INCT-A |
| CAPES PROEX Programa Astronomia |
| National Science Foundation's (NSF) NOIRLab |
| International Gemini Observatory |
| Western University Postdoctoral Fellowship Program |
| Agradecimiento |
|---|
| We thank Wagner J.B. Corradi from Universidade Federal de Minas Gerais for providing part of the polarimetric data and Daniel Bednarski from Universidade de Sao Paulo for providing the polarimetric data of HD 56876. |
| This work made use of the computing facilities of the Laboratory of Astroinformatics (IAG/USP, NAT/Unicsul), whose purchase was made possible by the Brazilian agency FAPESP (grant 2009/54006-4) and INCT-A. M.R.G. acknowledges support from CAPES PROEX Programa Astronomia and a grant awarded by the Western University Postdoctoral Fellowship Program. A.C.C. acknowledges support from CNPq (grant 311446/2019-1) and FAPESP (grant 2018/04055-8). C.E.J. acknowledges financial support from the Natural Sciences and Engineering Research Council of Canada. D.M.F. acknowledges support from the International Gemini Observatory, a program of the National Science Foundation's (NSF) NOIRLab, which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the NSF and on behalf of the Gemini partnership of Argentina, Brazil, Canada, Chile, the Republic of Korea, and the United States of America. |
| This research used the observations collected at the European Organization for Astronomical Research in the Southern Hemisphere under ESO programs 68.D-0095(A), 68.D-0280(A), 69.D-0381(A), 74.D-0240(A), 75.D-0507(A), 82.A-9202(A), 82.A-9208(A), 82.A-9209(A), 268.D-5751(A), and 282.D-5014(B). |
| Some of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). STScI is operated by AURA under NASA contract NAS5-26555. Support for MAST for non-Hubble Space Telescope data is provided by the NASA Office of Space Science via grant NNX13AC07G and by other grants and contracts. |
| This work made use of data from the European Space Agency mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC; https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for DPAC has been provided by national institutions, particularly the institutions participating in the Gaia Multilateral Agreement. |
| The IR-band data were provided by Juan Fabregat Llueca, and they were obtained at SAAO and at the Teide Observatory (Tenerife, Spain). |
| We thank Wagner J.B. Corradi from Universidade Federal de Minas Gerais for providing part of the polarimetric data and Daniel Bednarski from Universidade de Sao Paulo for providing the polarimetric data of HD 56876. |