LUT observations of the mass-transferring binary AI Dra

Liao, Wuping; Qian, S.‐B.; Li, Linjia; Xiao, Zhi Yu; Zhao, En-Guang; Liu, Nianping

doi:10.1007/s10509-016-2771-7

“…The LUT uses a CCD to observe a 1.36 • ×1.36 • field of view with a passband covering 245-345 nm [151,152]. It has been used to obtain light curves of several binary systems including the semi-detached binaries AI Dra, TW Dra and V548 Cyg [153][154][155], and the contact binary V921 Her [156].…”

Section: Other Space Missionsmentioning

confidence: 99%

Space-Based Photometry of Binary Stars: From Voyager to TESS

Southworth

¹

2021

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Binary stars are crucial laboratories for stellar physics, so have been photometric targets for space missions beginning with the very first orbiting telescope (OAO-2) launched in 1968. This review traces the binary stars observed and the scientific results obtained from the early days of ultraviolet missions (OAO-2, Voyager, ANS, IUE), through a period of diversification (Hipparcos, WIRE, MOST, BRITE), to the current era of large planetary transit surveys (CoRoT, Kepler, TESS). In this time observations have been obtained of detached, semi-detached and contact binaries containing dwarfs, sub-giants, giants, supergiants, white dwarfs, planets, neutron stars and accretion discs. Recent missions have found a huge variety of objects such as pulsating stars in eclipsing binaries, multi-eclipsers, heartbeat stars and binaries hosting transiting planets. Particular attention is paid to eclipsing binaries, because they are staggeringly useful, and to the NASA Transiting Exoplanet Survey Satellite (TESS) because its huge sky coverage enables a wide range of scientific investigations with unprecedented ease. These results are placed into context, future missions are discussed, and a list of important science goals is presented.

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“…The LUT uses a CCD to observe a 1.36 • ×1.36 • field of view with a passband covering 245-345 nm [151,152]. It has been used to obtain light curves of several binary systems including the semi-detached binaries AI Dra, TW Dra and V548 Cyg [153][154][155], and the contact binary V921 Her [156].…”

Section: Other Space Missionsmentioning

confidence: 99%

Space-Based Photometry Of Binary Stars: From Voyager To TESS

Southworth¹

2021

Preprint

0

View full text Add to dashboard Cite

Binary stars are crucial laboratories for stellar physics, so have been photometric targets for space missions beginning with the very first orbiting telescope (OAO-2) launched in 1968. This review traces the binary stars observed and the scientific results obtained from the early days of ultraviolet missions (OAO-2, Voyager, ANS, IUE), through a period of diversification (Hipparcos, WIRE, MOST, BRITE), to the current era of large planetary transit surveys (CoRoT, Kepler, TESS). In this time observations have been obtained of detached, semi-detached and contact binaries containing dwarfs, sub-giants, giants, supergiants, white dwarfs, planets, neutron stars and accretion discs. Recent missions have found a huge variety of objects such as pulsating stars in eclipsing binaries, multi-eclipsers, heartbeat stars and binaries hosting transiting planets. Particular attention is paid to eclipsing binaries, because they are staggeringly useful, and to the NASA Transiting Exoplanet Survey Satellite (TESS) because its huge sky coverage enables a wide range of scientific investigations with unprecedented ease. These results are placed into context, future missions are discussed, and a list of important science goals is presented.

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“…Long term changes of the orbital period in Algol-type close binary systems are very common phenomena. The orbital period of some Algols present a secular increasing tendency, such as systems of S Equ (Qian & Zhu 2002), UW Vir (Zhang et al 2009) and AI Dra (Liao et al 2016, while other Algols show decreasing behaviors of the orbital period, e.g., Qian (2000bQian ( , 2001aQian ( ,b, 2002; Zhu et al (2009); Erdem & Öztürk (2014) and Wang & Zhu (2016).…”

Section: Secular Orbital Evolutionmentioning

confidence: 99%

Period investigation of Algol systems TZ Eri and TU Her

Wang

¹

,

Zhu

²

,

Li

³

et al. 2019

Res. Astron. Astrophys.

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TZ Eri and TU Her are both classic Algol-type systems (Algols). By observing and collecting times of minimum light, we constructed the O – C curves for the two systems. The long-time upward and downward parabolas shown in these diagrams are considered to be the result of the combination of mass transfer and angular momentum loss. The secular orbital period change rates are dP/dt = 4.74(± 0.12) × 10−7 d yr−1 and dP/dt = −2.33(± 0.01)× 10−6 d yr−1, respectively. There are also cyclic variations in their O – C curves which might be caused by the light-travel time effect (LTTE). A circumbinary star may exist in the TZ Eri system with a mass of at least 1.34 M ⊙, while there are possibly two celestial bodies that almost follow a 2 : 1 resonance orbit around the TU Her binary pair. Their masses are at least 2.43 M ⊙ and 1.27 M ⊙.

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LUT observations of the mass-transferring binary AI Dra

Cited by 10 publications

References 18 publications

Space-Based Photometry of Binary Stars: From Voyager to TESS

Space-Based Photometry of Binary Stars: From Voyager to TESS

Space-Based Photometry Of Binary Stars: From Voyager To TESS

Period investigation of Algol systems TZ Eri and TU Her

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