High-resolution spectroscopy of detached solar-type eclipsing binaries observed during the Kepler K2 mission

Autor: Ömür Çakırlı, Barış Hoyman
Přispěvatelé: Ege Üniversitesi
Rok vydání: 2020
Předmět:
Zdroj: Monthly Notices of the Royal Astronomical Society. 493:2329-2338
ISSN: 1365-2966
0035-8711
Popis: Solar-type stars in eclipsing binaries are proving to be a remarkable resource of knowledge for testing models of stellar evolution, as spectroscopic and photometric studies have opened up a window into their interiors. Until recently, many cases have been worked out with Kepler data. in an ongoing effort to elucidate this research, we examine five detached eclipsing binaries, selected from the Kepler catalogue. There is a well-known stellar parameter discrepancy for low-mass stars, in that the observed radii and masses are often larger and stars overluminous than predicted by theory by several per cent. in our samples, we found five double-lined binaries, with solar-type stars dominating the spectrum. the orbital and light-curve solutions were found for them, and compared with isochrones, in order to estimate absolute physical parameters and evolutionary status of the components. An important aspect of this work is that the calculated stellar radii and masses are consistent with theoretical models within the uncertainties, whereas the estimated temperatures from the disentangled spectra of the components are no different than predicted.
ESO [089.D-0097(B), 091.D-0145(B), 094.A-9029(R), 098.D-0076(A), 0100.D-0339(B), 0100.D-0273(A)]; NASA's Science Mission Directorate; National Aeronautics and Space AdministrationNational Aeronautics & Space Administration (NASA); National Science FoundationNational Science Foundation (NSF); Ege University Research FoundationEge University [FDK-2019-20215]
This research made use of data collected at ESO under programmes 089.D-0097(B) and 091.D-0145(B) (by K. Helminiak), 094.A-9029(R) (by R. Gredel), 098.D-0076(A) (by J. Southworth), 0100.D-0339(B) (by G. Pietrzynski), 0100.D-0273(A) (by W. Gieren). This work is based on data from the Kepler mission. Kepler was competitively selected as the tenth Discovery mission. Funding for this mission is provided by NASA's Science Mission Directorate. the photometric data were obtained from the Mikulski Archive for Space Telescopes (MAST). This work has also made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium).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 andAnalysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. We thank Ege University Research Foundation (Project No. FDK-2019-20215) for supporting this study. the authors express their sincere thanks to an anonymous referee whose valuable comments led to an improvement of the paper. This article is a part of the PhD thesis of B. Hoyman. the following internet-based resources were used in research for this paper: the NASA Astrophysics Data System; the SIMBAD data base operated at CDS, Strasbourg, France.
Databáze: OpenAIRE
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