Observations of binary stars with the differential speckle survey instrument. V. Toward an empirical metal-poor mass-luminosity relation
Article
Article Title | Observations of binary stars with the differential speckle survey instrument. V. Toward an empirical metal-poor mass-luminosity relation |
---|---|
ERA Journal ID | 1048 |
Article Category | Article |
Authors | Horch, Elliott P. (Author), Van Altena, William F. (Author), Demarque, Pierre (Author), Howell, Steve B. (Author), Everett, Mark E. (Author), Ciardi, David R. (Author), Teske, Johanna K. (Author), Henry, Todd J. (Author) and Winters, Jennifer G. (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 149 (5), pp. 151-164 |
Article Number | 151 |
Number of Pages | 14 |
Year | 2015 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-6256/149/5/151 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-6256/149/5/151 |
Abstract | In an effort to better understand the details of the stellar structure and evolution of metal-poor stars, the Gemini North telescope was used on two occasions to take speckle imaging data of a sample of known spectroscopic binary stars and other nearby stars in order to search for and resolve close companions. The observations were obtained using the Differential Speckle Survey Instrument, which takes data in two filters simultaneously. The results presented here are of 90 observations of 23 systems in which one or more companions was detected, and six stars where no companion was detected to the limit of the camera capabilities at Gemini. In the case of the binary and multiple stars, these results are then further analyzed to make first orbit determinations in five cases, and orbit refinements in four other cases. The mass information is derived, and since the systems span a range in metallicity, a study is presented that compares our results with the expected trend in total mass as derived from the most recent Yale isochrones as a function of metal abundance. These data suggest that metal-poor main-sequence stars are less massive at a given color than their solar-metallicity analogues in a manner consistent with that predicted from the theory. |
Keywords | astrometry; binaries: visualtechniques: high angular resolution; techniques: interferometric techniques: photometric; |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | Southern Connecticut State University, United States |
Yale University, United States | |
National Aeronautics and Space Administration (NASA), United States | |
National Optical Astronomy Observatory, United States | |
Carnegie Institution of Washington, United States | |
Georgia State University, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4303/observations-of-binary-stars-with-the-differential-speckle-survey-instrument-v-toward-an-empirical-metal-poor-mass-luminosity-relation
1207
total views111
total downloads1
views this month0
downloads this month