A Bright Short Period M-M Eclipsing Binary from the KELT Survey: Magnetic Activity and the Mass–Radius Relationship for M Dwarfs
Article
Article Title | A Bright Short Period M-M Eclipsing Binary from the KELT Survey: Magnetic Activity and the Mass–Radius Relationship for M Dwarfs |
---|---|
ERA Journal ID | 1057 |
Article Category | Article |
Authors | Lubin, Jack B. (Author), Rodriguez, Joseph E. (Author), Zhou, George (Author), Conroy, Kyle E. (Author), Stassun, Keivan G. (Author), Collins, Karen (Author), Stevens, Daniel J. (Author), Labadie-Bartz, Jonathan (Author), Stockdale, Christopher (Author), Myers, Gordon (Author), Colon, Knicole D. (Author), Bento, Joao (Author), Kehusmaa, Petri (Author), Petrucci, Romina (Author), Jofre, Emiliano (Author), Quinn, Samuel N. (Author), Lund, Michael B. (Author), Kuhn, Rudolf B. (Author), Siverd, Robert J. (Author), Beatty, Thomas G. (Author), Harlingten, Caisey (Author), Pepper, Joshua (Author), Gaudi, B. Scott (Author), James, David (Author), Jensen, Eric L. N. (Author), Reichart, Daniel (Author), Kedziora-Chudczer, Lucyna (Author), Bailey, Jeremy (Author) and Melville, Graeme (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 844 (2), pp. 1-12 |
Article Number | 134 |
Number of Pages | 12 |
Year | 2017 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-4357/aa7947 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-4357/aa7947 |
Abstract | We report the discovery of KELT J041621-620046, a moderately bright (J ∼ 10.2) M-dwarf eclipsing binary system at a distance of 39 ± 3 pc. KELT J041621-620046 was first identified as an eclipsing binary using observations from the Kilodegree Extremely Little Telescope (KELT) survey. The system has a short orbital period of ∼1.11 days and consists of components with M1 = 0.447+0.052-0.047 M⊙ and M2 = 0.399+0.046-0.042 M⊙ in nearly circular orbits. The radii of the two stars are R1 = 0.540+0.034-0.032 R⊙ and R2 = 0.453 &plummn; 0.017 R⊙. Full system and orbital properties were determined (to ∼10% error) by conducting an EBOP (Eclipsing Binary Orbit Program) global modeling of the high precision photometric and spectroscopic observations obtained by the KELT Follow-up Network. Each star is larger by 17%-28% and cooler by 4%-10% than predicted by standard (non-magnetic) stellar models. Strong Hα emission indicates chromospheric activity in both stars. The observed radii and temperature discrepancies for both components are more consistent with those predicted by empirical relations that account for convective suppression due to magnetic activity. |
Keywords | binaries: eclipsing; binaries: general; stars: low-mass; Astrophysics; Solar and Stellar Astrophysics |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Byline Affiliations | Vanderbilt University, United States |
Center for Astrophysics Harvard and Smithsonian, United States | |
Ohio State University, United States | |
Lehigh University, United States | |
American Association of Variable Star Observers, United States | |
NASA Goddard Space Flight Center, United States | |
Australian National University | |
Ahlarkapin Observatory, Chile | |
Argentine National Observatory, Argentina | |
South African Astronomical Observatory, South Africa | |
Las Cumbres Observatory, United States | |
Pennsylvania State University, United States | |
University of Washington, United States | |
Swarthmore College, United States | |
University of North Carolina, United States | |
University of New South Wales | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6x4x/a-bright-short-period-m-m-eclipsing-binary-from-the-kelt-survey-magnetic-activity-and-the-mass-radius-relationship-for-m-dwarfs
Download files
84
total views41
total downloads0
views this month0
downloads this month