First photometric and orbital period investigations of the total-eclipse contact binary V0339 Com

Yu, Yun-Xia; Li, Qing; Huang, Hui-Ping; Hu, Ke; Fang, Xiang

doi:10.1016/j.newast.2021.101695

Cited by 3 publications

(7 citation statements)

References 51 publications

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“…The other is based on empirical relations to estimate the absolute parameters. Here we adopted the updated empirical relation between the semimajor axis and orbital period derived by Yu et al (2022). By a combination of the photometric solution with the cool spot model and the two methods, the absolute parameters of IP Lyn were determined and are listed in Table 6.…”

Section: Photometric Solutions and Absolute Parametersmentioning

confidence: 99%

IP Lyn: A Totally Eclipsing Contact Binary with an Extremely Low Mass Ratio

Yin,

Meng,

et al. 2023

Res. Astron. Astrophys.

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We presented the first photometric and orbital period investigations for a neglected total-eclipse contact binary IP Lyn. The photometric solutions derived from both ground-based and several surveys' observations suggested that it is a shallow contact binary with an extremely low mass ratio of 0.055. The weak asymmetry observed in our multiple bands light curves can be interpreted as a result of an active cool spot on the primary. The absolute physical parameters were determined with the {\it Gaia}-distance-based method and checked by an empirical relation. Combining the eclipse timings collected from the literature and those derived from our and variable surveys' observations, we found that IP Lyn has been undergoing a secular orbital period increase for the past two decades, implying a mass transfer from the less massive secondary to the primary. By comparing the current parameters with the critical instability ones, we inferred that IP Lyn is currently stable in spite of its relatively low mass ratio and orbital angular momentum. Finally, from a catalog of 117 extremely low mass ratio contact binaries, we found that their orbital angular momenta are significantly lower than those of the contact binaries with a relatively high mass ratio, suggesting they should be at the late evolutionary stage of contact binary.

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Section: Photometric Solutions and Absolute Parametersmentioning

confidence: 99%

IP Lyn: A Totally Eclipsing Contact Binary with an Extremely Low Mass Ratio

Yin,

Meng,

et al. 2023

Res. Astron. Astrophys.

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“…Although the radial-velocity curves for the four binaries are absent so far, we can still estimate their absolute physical parameters according to the following two different methods: (1) the scheme based on the Gaia distance (Kjurkchieva et al 2019), and (2) the empirical relations (Qian 2003;Gazeas 2009;Yu et al 2022). The standard procedure for the former was proposed by Kjurkchieva et al (2019) and developed by Liu et al (2020) and Li et al (2021).…”

Section: Photometric Solutions and Absolute Parametersmentioning

confidence: 99%

“…These parameters are summarised in Table 8. For the later, we adopted the up-date empirical relation between the semi-major axis and orbital period derived by Yu et al (2022), log a = 0.856(18) log P + 0.784( 7).…”

Section: Photometric Solutions and Absolute Parametersmentioning

confidence: 99%

“…Based on the absolute physical parameters, we located the four binaries at the mass-radius and mass-luminosity diagrams (Figure 8) to discuss their evolutionary states. For comparison, 179 contact binaries collected by Yu et al (2022) were also added in Figure 8. In the diagrams, the Zero-Age Main Sequence (ZAMS) and Terminal-Age Main Sequence (TAMS) lines were calculated based on the PARSEC models o (Bressan et al 2012).…”

Section: Evolution Of Contact Binariesmentioning

confidence: 99%

“…Combining the catalog of Yu et al (2022) with our four targets, we here systematically calculated the statistical averages of physical parameters for two subtypes of contact binaries (Table 13). Clearly, the W-subtype contact binaries have shorter orbital periods and lower temperatures than the A-subtype systems.…”

Section: Evolution Of Contact Binariesmentioning

confidence: 99%

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First photometric and orbital period investigations of four W UMa-type eclipse binaries

Meng

Wang

et al. 2022

Publ. Astron. Soc. Aust.

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We presented the first photometric and orbital period investigations for four W Ursae Majoris-type binaries: V473 And, V805 And, LQ Com, and EG CVn. The photometric solutions suggested that V805 And and LQ Com are two total-eclipse contact binaries, while V473 And and EG CVn are partial-eclipse ones. V473 And and LQ Com belong to the A-subtype contact binaries, while V805 And and EG CVn belong to the W subtype. The O’Connell effects found in the light curves of V805 And, LQ Com, and EG CVn can be interpreted as a result of a cool spot on the surface of their less massive and hotter primary components. Based on two different methods, the absolute physical parameters were properly determined. Combining the eclipse timings derived from our observations and survey’s data with those collected from literature, we investigated their orbital period variations. The results show that the orbital periods of V473 And, V805 And, and EG CVn are undergoing a secular decrease/increase superposed a periodic variation, while LQ Com exhibits a possible cyclic period variation with a small amplitude. The secular period changes are caused mainly by the mass transfer between two components, while the cyclic period oscillations may be interpreted as the results of either the light-time effect due to the third body or the cyclic magnetic activity. Finally, we made a statistical investigation for nearly 200 contact binaries with reliable physical parameters. The statistical results suggested that the W-subtype systems are more evolved than the A-subtype ones. Furthermore, the evolutionary direction of A-subtype into W-subtype systems is also discussed. The opposite evolutionary direction seems to be unlikely because it requires an increase of the total mass, the orbital angular momentum, and the temperature differences between two components of a binary system.

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The First Photometric Study of W UMa Binary System V1833 Ori

Tanriver¹,

Bulut²

2022

Res. Astron. Astrophys.

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The first photometric solution in the B, V, Rc and Ic filters of the short period V1833 Ori eclipsing binary is presented based on new ground-based CCD photometric observations. We analysed the BVRI photometric light curves of the system, using Phoebe0.31a, a binary star modelling program, with the Wilson and Devinney method based on Roche geometry to achieve the best accordance to the photometric observations to determine their absolute parameters from the light curves. We updated the ephemeris of V1833 Ori using two new light curve minima derived by our new observational data from those collected in the literature and analysed the change of the system’s orbital period. The O–C analysis indicates that the variations of the orbital period of V1833 Ori with time are increasing at a rate of 3.03 × 10−7days yr−1. The distance of V1833 Ori are 173.7 ± 15.6 pc. From the solutions, we find that V1833 Ori is A–subtype W UMa over-contact binaries with q = 0.701 mass ratios and f = 1.14 fill–out factor. The HR diagram positions of the eclipsing binary system’s components are discussed. The system’s absolute dimensions were compared to those of similar binaries in the logTef f − logL, logM − logL, logM − logR and logM − logJ0 diagrams.

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First photometric and orbital period investigations of the total-eclipse contact binary V0339 Com

Cited by 3 publications

References 51 publications

IP Lyn: A Totally Eclipsing Contact Binary with an Extremely Low Mass Ratio

IP Lyn: A Totally Eclipsing Contact Binary with an Extremely Low Mass Ratio

First photometric and orbital period investigations of four W UMa-type eclipse binaries

The First Photometric Study of W UMa Binary System V1833 Ori

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