The American Association of Variable Star Observers

Campbell, Leon

doi:10.1126/science.96.2496.405

Cited by 5 publications

(4 citation statements)

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“…Profesyonel astronomiden gelip de eğitim ve bilim-toplum dallarına emek verenler, tipik olarak astronomide ileri bir eğitime sahiptir, ancak pedagojinin ilgili alanlarında ileri bir eğitime sahip değildir. Öte yandan öğretmenlerin çoğu, öğrettikleri konulardaki eğitimlerinin yanı sıra pedagojik eğitime de sahiptir, ancak çoğu zaman bu eğitim, astronomi ve astronomi eğitiminde bir örgün eğitimi içermemektedir (Percy 2006).…”

Section: Uluslararasıunclassified

An International Astronomy Education Project for Mediterranean Region Countries

YELKENCİ,

KOÇER

2023

Turkish Journal of Astronomy and Astrophysics

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Projemizin amacı 6-12 yaş aralığındaki çocuklar için dünyadaki diğer öğretmenler tarafından kullanılabilecek bir eğitim yolu üretmek olup bir ortak tasarlama sürecini kapsamaktadır. IAU "Office of Astronomy for Education Italy OAE Center" tarafından yürütülen projeye Akdeniz’e kıyısı olan Türkiye’nin de içinde olduğu 13 ülke dahil olmuştur. Astronomi/Astrofizik/Fizik alanında özellikle “ışık” kavramını açıklayan ve kullanan bir dizi etkinlik üretmek için ülkelerdeki IAU OAE NAEC Ulusal Astronomi Eğitimi Koordinatörleri ve ekipleri birlikte tasarlama sürecine 2 Aralık 2021 tarihinde başlamıştır. 12 aylık projenin temel hede astroedu.iau.org veri tabanına kaynak oluşturacak yeni etkinlikler üretmektir. Farklı ülkelerdeki eğitim düzeni ve ihtiyaçlarını göze alarak yeni etkinliklerin birlikte tasarlanması, geliştirilmesi, denenmesi, öğretmen ile öğrencilerin erişimine açılması planlanmıştır.

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Section: Uluslararasıunclassified

An International Astronomy Education Project for Mediterranean Region Countries

YELKENCİ,

KOÇER

2023

Turkish Journal of Astronomy and Astrophysics

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“…Nijland (1931) Notes: P orb , m 1 , m 2 , r 1 , r 2 , i, A and f 1 are the orbital period of the eclipsing system, masses of the primary and secondary stars, radii of the primary and secondary stars, the orbital inclination, the semi-major axis and the filling factor of the primary star. & Popa (1967), Mallama (1980), Brancewicz & Dworak (1980), Diethelm (2003), Samolyk (2010), etc. According to the result of Barblan et al (1998) and Budding et al (2004), the absolute parameters were obtained and are listed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Period investigation of Algol systems TZ Eri and TU Her

Wang

Zhu

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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“…As far as we know, the orbital period of AH Vir has not been researched for more than 15 yr, since the work of Hobart et al (1998). However, up to now, a large number of new minima times have been published by many authors (e.g., Paschke 2012;Hübscher et al 2013;Parimucha et al 2013;Samolyk 2013). This indicates that the orbital period of AH Vir needs to be further investigated.…”

Section: Introductionmentioning

confidence: 99%

The orbital period variations of AH Virginis

Chen

Fang

et al. 2015

Res. Astron. Astrophys.

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We present a study of orbital period changes in AH Virginis. We perform a careful literature search for all available minima times, from which we derived a new linear ephemeris and constructed an O — C curve. We found that the orbital period of AH Virginis shows a long-term increase, dP/dt = (2.1869 ± 0.0161) × 10−7 d yr−1, and a small periodic variation with a period of 37.19 yr. Since AH Virginis is an over-contact system and the primary component shows strong Hα and Mg II emission lines, we discuss the possible connection between mass transfer, magnetic activity and orbital period changes.

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The American Association of Variable Star Observers

Cited by 5 publications

References 0 publications

An International Astronomy Education Project for Mediterranean Region Countries

An International Astronomy Education Project for Mediterranean Region Countries

Period investigation of Algol systems TZ Eri and TU Her

The orbital period variations of AH Virginis

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