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| DOI | 10.3847/1538-4357/835/1/53 | ||||
| Año | 2017 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We report the results of high-resolution (R similar to 80,000) spectroscopic observations of the emission-line object HD 85567, which has been classified as an FS CMa type object or a pre-main-sequence star. The main goal is to put more constraints on the object's fundamental parameters, as well as on its nature and evolutionary state. Absorption lines in the spectrum of HD 85567 were found to be similar to those of mid-B-type dwarfs and correspond to the following fundamental parameters: T-eff = 15,000 +/- 500 K, v sin i = 31 +/- 3 km s(-1), and log g similar to 4.0. The interstellar extinction, A(V) = 0.50 +/- 0.02 mag, was measured using the strengths of some diffuse interstellar bands. We also obtained UBV(RI)(c) images of a 10' x 10' region around the object. Photometry of projectionally close stars was used to derive an interstellar extinction law in this direction and resulted in a distance of 1300 +/- 100 pc to the object and a luminosity of log L/L-circle dot = 3.3 +/- 0.2. We found no significant radial velocity variations of the absorption lines in the spectra of HD 85567 obtained during two-month-long periods of time in 2012 and 2015. Our analysis of the spectroscopic and photometric data available for the star led us to a conclusion that it cannot be a pre-main-sequence Herbig Ae/Be star. We argue that the circumstellar gas and dust were produced during the object's evolution as most likely a binary system, which contains an undetected secondary component and is unlikely to be a merger product.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Khokhlov, S. A. | Hombre |
Al Farabi Kazakh Natl Univ - Kazajistán
Univ North Carolina Greensboro - Estados Unidos Al Farabi Kazakh National University - Kazajistán The University of North Carolina at Greensboro - Estados Unidos |
| 2 | Miroshnichenko, A | Hombre |
Univ North Carolina Greensboro - Estados Unidos
Natl Ctr Space Explorat & Technol - Kazajistán The University of North Carolina at Greensboro - Estados Unidos National Center of Space Research and Technologies - Kazajistán |
| 3 | MENNICKENT-CID, RONALD ENRIQUE | Hombre |
Universidad de Concepción - Chile
Centro de Excelencia en Astrofísica y Tecnologías Afines - Chile |
| 4 | CABEZAS-RETAMAL, MAURICIO EDUARDO | Hombre |
Universidad de Concepción - Chile
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| 5 | Zhanabaev, Z. Zh. | - |
Al Farabi Kazakh Natl Univ - Kazajistán
Al Farabi Kazakh National University - Kazajistán |
| 6 | Reichart, Daniel E. | Hombre |
Univ North Carolina Chapel Hill - Estados Unidos
The University of North Carolina at Chapel Hill - Estados Unidos |
| 7 | Ivarsen, Kevin M. | - |
The University of North Carolina at Chapel Hill - Estados Unidos
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| 8 | Haislip, Joshua | Hombre |
Univ North Carolina Chapel Hill - Estados Unidos
The University of North Carolina at Chapel Hill - Estados Unidos |
| 9 | Nysewander, M. | Mujer |
Univ North Carolina Chapel Hill - Estados Unidos
The University of North Carolina at Chapel Hill - Estados Unidos |
| 10 | Ivarsen, K. M. | - |
Univ North Carolina Chapel Hill - Estados Unidos
The University of North Carolina at Chapel Hill - Estados Unidos |
| 10 | LaCluyze, A. P. | - |
Univ North Carolina Chapel Hill - Estados Unidos
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| Fuente |
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| National Science Foundation |
| National Aeronautics and Space Administration |
| BASAL Centro de Astrofisica y Tecnologias Afines (CATA) |
| VRID-Enlace |
| Direct For Mathematical & Physical Scien; Division Of Astronomical Sciences |
| Division Of Astronomical Sciences; Direct For Mathematical & Physical Scien |
| Agradecimiento |
|---|
| S.K. acknowledges help from the University of North Carolina at Greensboro in organizing his trips to and stay in Greensboro, NC. R.M. acknowledges support by VRID-Enlace 216.016.002-1.0 and the BASAL Centro de Astrofisica y Tecnologias Afines (CATA) PFB-06/2007. We thank David Hollenbach for useful discussion of the photo-evaporation theory and its predictions. We thank Y. Fremat for making a Fourier transfer code to measure rotational velocities available to us. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. |