V680 Mon - a young mercury-manganese star in an eclipsing heartbeat system
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F21%3A00121826" target="_blank" >RIV/00216224:14310/21:00121826 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1093/mnras/stab1059" target="_blank" >https://doi.org/10.1093/mnras/stab1059</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stab1059" target="_blank" >10.1093/mnras/stab1059</a>
Alternative languages
Result language
angličtina
Original language name
V680 Mon - a young mercury-manganese star in an eclipsing heartbeat system
Original language description
Chemically peculiar stars in eclipsing binary systems are rare objects that allow the derivation of fundamental stellar parameters and important information on evolutionary status and the origin of the observed chemical peculiarities. Here we present an investigation of the known eclipsing binary system BD+09 1467 = V680 Mon. Using spectra from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) and own observations, we identify the primary component of the system as a mercury–manganese (HgMn/CP3) star (spectral type kB9 hB8 HeB9 V HgMn). Furthermore, photometric time series data from the Transiting Exoplanet Survey Satellite (TESS) indicate that the system is a ‘heartbeat star’, a rare class of eccentric binary stars with short-period orbits that exhibit a characteristic signature near the time of periastron in their light curves due to the tidal distortion of the components. Using all available photometric observations, we present an updated ephemeris and binary system parameters as derived from a modelling of the system with the ELISA code, which indicate that the secondary star has an effective temperature of Teff = 8300(-200)(+200) (spectral type ∼A4). V680 Mon is only the fifth known eclipsing CP3 star, and the first one in a heartbeat binary. Furthermore, our results indicate that the star is located on the zero-age main sequence and a possible member of the open cluster NGC 2264. As such, it lends itself perfectly for detailed studies and may turn out to be a keystone in the understanding of the development of CP3 star peculiarities.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
1365-2966
Volume of the periodical
504
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
3749-3757
UT code for WoS article
000656139300041
EID of the result in the Scopus database
2-s2.0-85107884263