The Eclipsing System RX Geminorum.

Gaposchkin, Sergei

doi:10.1086/144868

Cited by 4 publications

(6 citation statements)

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“…In addition, both of these stars are known to have very shallow secondary minima. According to Gaposchkin (1946b) RY Gem's secondary minima was undetectable and that of Y Cam is only 0^1 according to Koch, Sobieski, and Wood (1963). These facts suggest that not much of an error would be made if h, i, j, k are computed by using the uvby magnitudes found for the lowest point on the light curves.…”

Section: Hi Analysismentioning

confidence: 98%

“…The final source of error in the c x photometry which will be considered is that due to possible emission lines having wavelengths near to the effective wavelengths of the u and v filters. During a search of the literature it was discovered that several of (he variables, e.g., AQ Peg, RW Per, QY Aql, RX Gem showed evidence for gaseous rings (Struve 1945(Struve , 1946aGaposchkin 1946a). Struve pointed out that emission was often found in the wings of the Balmer lines and that the relative strength of these features depended on the period of the binary as well as on the phase angle.…”

Section: Sources Of Error In M Vmentioning

confidence: 99%

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Multicolor Photometry of Eclipsing Binaries with "Undersize" Subgiant Secondaries

Barnes¹

1974

PASP

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Strömgren uvby photometric observations of 10 eclipsing binaries thought to contain undersize subgiant secondaries are presented and analyzed. A straightforward analysis of the data indicates that the primaries are 1-2 magnitudes brighter than luminosity class V stars and that they do not obey the normal main-sequence mass-luminosity law. However, due to the great sensitivy of mass to the photometrically derived absolute magnitude no firm conclusion was reached. In addition, the data suggest that the actual number of undersize systems may be less than previously thought.

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Section: Hi Analysismentioning

confidence: 98%

Section: Sources Of Error In M Vmentioning

confidence: 99%

Multicolor Photometry of Eclipsing Binaries with "Undersize" Subgiant Secondaries

Barnes¹

1974

PASP

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“…Wyse (1934) found a spectral type of A2 outside eclipse and A3p near the bottom of primary minimum. However, Gaposchkin (1946) assigned slightly later spectral types of A4 and A5, respectively. To remove this discrepancy, Wyse (1934) pro-posed the presence of a third body of spectral type A3 that does not participate in the eclipses.…”

Section: Introductionmentioning

confidence: 97%

“…RX Gem is a long-period ( days) Algol-type in-P p 12.2 teracting binary that contains an A-type primary and a K-type secondary. Visual and photographic solutions of the system were derived by Gaposchkin (1946). The first photoelectric UBV light curves were published by Hall & Walter (1975a), and the data were later analyzed by the same authors using the Russell-Merrill method (Hall & Walter 1975b).…”

Section: Introductionmentioning

confidence: 99%

Is the Algol‐type Eclipsing Binary RX Geminorum a True Triple System?

Qian¹,

Liu²,

Tan³

et al. 2002

PUBL ASTRON SOC PAC

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An analysis of the times of minimum light for the long-period Algol-type eclipsing binary RX Gem is presented based on a new linear ephemeris. The curve shows a cyclic oscillation with a period O Ϫ C of 55.7 yr and a semiamplitude of 0.0645 day. Assuming the change to be due to the presence of a "third body" revolving around the RX Gem system, the parameters of the third body's orbit are derived. Since the third-body assumption is in good agreement with the spectroscopic data from several authors and with published photometric solutions (Gaposchkin, Hall, & Walter; Giuricin et al.), RX Gem is likely to be a triple system. In this case, the third body is an A-type star in a circular orbit, which is nearly coplanar to the orbit of the eclipsing pair. However, the recent light-curve analysis by Olson & Etzel does not show any third light, so the third star ( ) M 1 2.41 M 3 , may be an unseen neutron star or black hole. Additional eclipse timings over the next decade will be important to verify the presence of the third body.

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“…The visual light curves by Lassovsky (1936), Gaposchkin (1953), Cesevic (1954) and the photographic light curves by Nekrasova (1945) and Wachmann (1948) were obtained, and KR Cyg was classified as "an Algol type binary" based on these studies. The first photoelectric observation of the system was made by Vetesnik (1965) who classified the system as "a β Lyr type eclipsing binary".…”

Section: Introductionmentioning

confidence: 99%

KR Cyg Revisited: New Results from the Light Curve Analysis

Sipahi¹,

Taș²

2006

AIP Conference Proceedings

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KR Cyg is a β Lyr type eclipsing binary. It was classified by many different authors as the spectral types A0, A1, A2.5 and A4 V. Since the different spectral types mean different temperatures, we see the different light curve analyse results in the literature. In this study we attempted to make photometric investigations for KR Cyg. We simultaneously analysed U, B, V, R light curves of KR Cyg using latest version of Wilson-Devinney code (Wilson and van Hamme, 2003), and compared with the analyse results published by the other authors in the literature.

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The Eclipsing System RX Geminorum.

Cited by 4 publications

References 0 publications

Multicolor Photometry of Eclipsing Binaries with "Undersize" Subgiant Secondaries

Multicolor Photometry of Eclipsing Binaries with "Undersize" Subgiant Secondaries

Is the Algol‐type Eclipsing Binary RX Geminorum a True Triple System?

KR Cyg Revisited: New Results from the Light Curve Analysis

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