BO Ari Light Curve Analysis using Ground-Based and TESS Data

Poro, Atila; Zamanpour, Shiva; Hashemi, Maryam; Aladağ, Yasemin; Aksaker, Nazım; Rezaei, Samaneh; Solmaz, Arif

doi:10.1016/j.newast.2021.101571

Cited by 12 publications

(3 citation statements)

References 28 publications

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“…Passing light through different filters depends on the star's surface temperature according to the Planck Law radiation distributions. It means that by having data from the blue and visual filters we can calculate the (B-V) index and obtain a good estimation of a star's surface temperature (Poro et al 2021).…”

Section: Light Curve Analysismentioning

confidence: 99%

BVRI Photometric Observations, Light Curve Solutions and Orbital Period Analysis of BF Pav

Poro¹,

Aliçavuş

Lajús

et al. 2021

Res. Astron. Astrophys.

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The new ephemeris and light curve analysis by synthesizing our mid-eclipse times and the former observations of BF Pav, that is classified as a W UMa-type eclipsing binary, are presented in this study. We also obtain this binary system's period changes using Wilson-Devinney code after five nights of observation utilizing BVRI filters. Our results demonstrate that BF Pav is a contact binary system with a photometric mass ratio 𝑞 = 0.94, and a fillout factor 𝑓 = 13%. We also calculated the distance of BF Pav 𝑑 = 250 ± 27 pc from distance modulus formula, which is in good agreement with the distance obtained from this binary system's parallax in Gaia DR2. From our O-C analysis, we found a continuous period increase at a rate of 0.3086634× 10 𝑑𝑎𝑦/𝑦𝑟 which corresponds to a period increase of 0.266 s 𝑐𝑒𝑛𝑡𝑢𝑟𝑦 . We determined the mass of each component of this binary system using two different methods and compare our results with the former study's results.

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Section: Light Curve Analysismentioning

confidence: 99%

BVRI Photometric Observations, Light Curve Solutions and Orbital Period Analysis of BF Pav

Poro¹,

Aliçavuş

Lajús

et al. 2021

Res. Astron. Astrophys.

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“…To determine the new times of minima and uncertainties, we utilized Python code using a Gaussian function and the Markov Chain Monte Carlo (MCMC) approach (Poro et al 2021). The minimum times in the previous studies and in this study were used to get the potential orbital period change using mideclipse times.…”

Section: Orbital Period Variationsmentioning

confidence: 99%

The First Multiband Photometric Light Curve Solutions of the V Gru Binary System from the Southern Hemisphere

Tanriver

Poro²,

Bulut

et al. 2023

Res. Astron. Astrophys.

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The first multiband photometric solutions of the short-period V Gru eclipsing binary from the southern hemisphere is presented in this study. Light curves of the system were observed through $BVI$ filters at the Congarinni Observatory in Australia for 15 nights. In addition to the new ground-based data, we also used the TESS observations in two sectors. We analyzed the light curves of the system using the PHysics Of Eclipsing BinariEs (PHOEBE) 2.4.7 version code to achieve the best accordance with the photometric observations. The solutions suggest that V Gru is a near-contact binary system with $q=1.302(81)$ mass ratio, $f_1=0.010(23)$, $f_2=-0.0.009(21)$, and $i=73.45(38)$. We considered the two hot spots on the hotter and cooler components for the light curve analysis. We extracted the minima times from the light curves based on the Markov Chain Monte Carlo (MCMC) approach. Using our new light curves, TESS, and additional literature minima, we computed the ephemeris of V Gru. The system's eclipse timing variation trend was determined using the MCMC method. This system is a good and challenging case for future studies.

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“…We used a Gaussian distribution model to fit selected portions of the light curves that included the minima to extract the times of minima from the TESS data. We employed MCMC sampling methods to determine the uncertainty of those timings [9,10]. The code is implemented in Python using the PyMC3 package [11].…”

Section: Dataset and Times Of Minimamentioning

confidence: 99%

FL Lyr: Light curve solutions and orbital period analysis by using tess data

PAKI¹

2023

Recent Adv Sci Eng

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The detached binary system FL Lyr, has been controversial based on previous studies; some studies have approved the existence of a third body, and a study with spectroscopic data could not confirm it. Based on new TESS observations, previous results have been recalculated and discussed. We extracted the minimum times from the TESS data and presented a new ephemeris based on the space-based observations by using the MCMC method. Based on the data from Kepler and TESS, the residual O-C diagram shows a sinusoidal period. We estimated the orbital period and the minimum mass of this probable third body to be 10.8 years and 5.6 MJ, respectively. However, due to some reasons mentioned in this study, we cannot confirm the existence of a third body. More photometric and spectroscopic data will be required in the future to analyze the orbital period variation of the FL Lyr binary system for the existence or absence of a third body. Light curve solutions of FL Lyr were done by the PHOEBE python code and the MCMC method. This system did not need to add a star-spot in the light curve solutions, and the system's absolute parameters were also obtained.

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BO Ari Light Curve Analysis using Ground-Based and TESS Data

Cited by 12 publications

References 28 publications

BVRI Photometric Observations, Light Curve Solutions and Orbital Period Analysis of BF Pav

BVRI Photometric Observations, Light Curve Solutions and Orbital Period Analysis of BF Pav

The First Multiband Photometric Light Curve Solutions of the V Gru Binary System from the Southern Hemisphere

FL Lyr: Light curve solutions and orbital period analysis by using tess data

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