HD 183986: A High-contrast SB2 System with a Pulsating Component Article Swipe
M. Vaňko
,
T. Pribulla
,
P. Gajdoš
,
J. Budaj
,
J. Zverko
,
E. Paunzen
,
Z. Garai
,
Ľ. Hambálek
,
R. Komžík
,
E. Kundra
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.3847/1538-3881/ac617b
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.3847/1538-3881/ac617b
There is a small group of peculiar early-type stars on the main sequence that show different rotation velocities from different spectral lines. This inconsistency might be due to the binary nature of these objects. We aim to verify this hypothesis by a more detailed spectroscopic and photometric investigation of one such object: HD 183986. We obtained 151 high- and medium-resolution spectra that covered an anticipated long orbital period. There is clear evidence of the orbital motion of the primary component. We uncovered a very faint and broad spectrum of the secondary component. The corresponding SB2 orbital parameters, and the component spectra, were obtained by Fourier disentangling using the KOREL code. The component spectra were further modeled by iSpec code to arrive at the atmospheric quantities and the projected rotational velocities. We have proven that this object is a binary star with a period P = 1268.2(11) days, eccentricity e = 0.5728(20), and mass ratio q = 0.655. The primary component is a slowly rotating star ( km s −1 ) while the cooler and less massive secondary rotates much faster ( 120 km s −1 ). Photometric observations obtained by the Transiting Exoplanet Survey Satellite (TESS) satellite were also investigated to shed more light on this object. A multiperiod photometric variability was detected in the TESS data ranging from hours (the δ Sct-type variability) to a few days (spots/rotational variability). The physical parameters of the components and the origin of the photometric variability are discussed in more detail.
Related Topics
Concepts
Physics
Astrophysics
Spectral line
Binary number
Rotation period
Component (thermodynamics)
Rotation (mathematics)
Stars
Eccentricity (behavior)
Stellar classification
Orbital elements
Primary (astronomy)
Orbital period
Orbital eccentricity
Astronomy
Geometry
Political science
Thermodynamics
Mathematics
Law
Arithmetic
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3847/1538-3881/ac617b
- OA Status
- gold
- References
- 48
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4223628309
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4223628309Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3847/1538-3881/ac617bDigital Object Identifier
- Title
-
HD 183986: A High-contrast SB2 System with a Pulsating ComponentWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2022Year of publication
- Publication date
-
2022-05-03Full publication date if available
- Authors
-
M. Vaňko, T. Pribulla, P. Gajdoš, J. Budaj, J. Zverko, E. Paunzen, Z. Garai, Ľ. Hambálek, R. Komžík, E. KundraList of authors in order
- Landing page
-
https://doi.org/10.3847/1538-3881/ac617bPublisher landing page
- Open access
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YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
- OA URL
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https://doi.org/10.3847/1538-3881/ac617bDirect OA link when available
- Concepts
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Physics, Astrophysics, Spectral line, Binary number, Rotation period, Component (thermodynamics), Rotation (mathematics), Stars, Eccentricity (behavior), Stellar classification, Orbital elements, Primary (astronomy), Orbital period, Orbital eccentricity, Astronomy, Geometry, Political science, Thermodynamics, Mathematics, Law, ArithmeticTop concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
- References (count)
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48Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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