Colección SciELO Chile

Departamento Gestión de Conocimiento, Monitoreo y Prospección
Consultas o comentarios: productividad@anid.cl
Búsqueda Publicación
Búsqueda por Tema Título, Abstract y Keywords



A Multi-Observing Technique Study of the Dynamical Evolution of the Viscous Disk around the Be Star <i>ω</i> CMa
Indexado
WoS WOS:000628192700001
Scopus SCOPUS_ID:85103248625
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


Abstract



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.

Revista



Revista ISSN
Astrophysical Journal 0004-637X

Métricas Externas



PlumX Altmetric Dimensions

Muestra métricas de impacto externas asociadas a la publicación. Para mayor detalle:

Disciplinas de Investigación



WOS
Astronomy & Astrophysics
Scopus
Sin Disciplinas
SciELO
Sin Disciplinas

Muestra la distribución de disciplinas para esta publicación.

Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional



Muestra la distribución de colaboración, tanto nacional como extranjera, generada en esta publicación.


Autores - Afiliación



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

Muestra la afiliación y género (detectado) para los co-autores de la publicación.

Financiamiento



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

Muestra la fuente de financiamiento declarada en la publicación.

Agradecimientos



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.

Muestra la fuente de financiamiento declarada en la publicación.