Mid-Cycle Observations of CR Boo and Estimation of the System

Mid-Cycle Observations of CR Boo and Estimation of the System

We present observations (with NAO Rozhen and AS Vidojevica telescopes) of the AM Canum Venaticorum (AM CVn) binary star CR Bootis (CR Boo) in the UBV bands. The data were obtained in two nights in July 2019, when the V band brightness was in the range of 16.1–17.0 mag. In both nights, a variability...

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Main Authors: Daniela Boneva, Svetlana Boeva, Yanko Nikolov, Zorica Cvetković, Radoslav Zamanov
Format: Article
Language:English
Published: MDPI AG 2020-12-01
Series:Data
Subjects:
astronomy
binary stars
AM CVn stars: CR Boo
Online Access:https://www.mdpi.com/2306-5729/5/4/113
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spelling doaj-5f8a7c9131084b9bbfa77578a4c9beab2020-12-03T00:00:33ZengMDPI AGData2306-57292020-12-01511311310.3390/data5040113Mid-Cycle Observations of CR Boo and Estimation of the SystemDaniela Boneva0Svetlana Boeva1Yanko Nikolov2Zorica Cvetković3Radoslav Zamanov4Space Research and Technology Institute, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 1784 Sofia, BulgariaInstitute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 1784 Sofia, BulgariaAstronomical Observatory, 11060 Belgrade, SerbiaInstitute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 1784 Sofia, BulgariaWe present observations (with NAO Rozhen and AS Vidojevica telescopes) of the AM Canum Venaticorum (AM CVn) binary star CR Bootis (CR Boo) in the UBV bands. The data were obtained in two nights in July 2019, when the V band brightness was in the range of 16.1–17.0 mag. In both nights, a variability for a period of 25 ± 1 min and amplitude of about 0.2 magnitudes was visible. These brightness variations are most likely indications of “humps”. During our observational time, they appear for a period similar to the CR Boo orbital period. A possible reason of their origin is the phase rotation of the bright spot, placed in the contact point of the infalling matter and the outer disc edge. We estimated some of the parameters of the binary system, on the base of the observational data.https://www.mdpi.com/2306-5729/5/4/113astronomybinary starsAM CVn stars: CR Boo
collection DOAJ
language English
format Article
sources DOAJ
author Daniela Boneva
Svetlana Boeva
Yanko Nikolov
Zorica Cvetković
Radoslav Zamanov
spellingShingle Daniela Boneva
Svetlana Boeva
Yanko Nikolov
Zorica Cvetković
Radoslav Zamanov
Mid-Cycle Observations of CR Boo and Estimation of the System
Data
astronomy
binary stars
AM CVn stars: CR Boo
author_facet Daniela Boneva
Svetlana Boeva
Yanko Nikolov
Zorica Cvetković
Radoslav Zamanov
author_sort Daniela Boneva
title Mid-Cycle Observations of CR Boo and Estimation of the System
title_short Mid-Cycle Observations of CR Boo and Estimation of the System
title_full Mid-Cycle Observations of CR Boo and Estimation of the System
title_fullStr Mid-Cycle Observations of CR Boo and Estimation of the System
title_full_unstemmed Mid-Cycle Observations of CR Boo and Estimation of the System
title_sort mid-cycle observations of cr boo and estimation of the system
publisher MDPI AG
series Data
issn 2306-5729
publishDate 2020-12-01
description We present observations (with NAO Rozhen and AS Vidojevica telescopes) of the AM Canum Venaticorum (AM CVn) binary star CR Bootis (CR Boo) in the UBV bands. The data were obtained in two nights in July 2019, when the V band brightness was in the range of 16.1–17.0 mag. In both nights, a variability for a period of 25 ± 1 min and amplitude of about 0.2 magnitudes was visible. These brightness variations are most likely indications of “humps”. During our observational time, they appear for a period similar to the CR Boo orbital period. A possible reason of their origin is the phase rotation of the bright spot, placed in the contact point of the infalling matter and the outer disc edge. We estimated some of the parameters of the binary system, on the base of the observational data.
topic astronomy
binary stars
AM CVn stars: CR Boo
url https://www.mdpi.com/2306-5729/5/4/113
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AT yankonikolov midcycleobservationsofcrbooandestimationofthesystem
AT zoricacvetkovic midcycleobservationsofcrbooandestimationofthesystem
AT radoslavzamanov midcycleobservationsofcrbooandestimationofthesystem
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