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Detailed photometric analysis of V523 And and V543 And from the Wide Angle Search for Planets survey is presented for the first time. It was found that while V523 And is a detached binary, V543 And is a semi-detached binary star system. The adopted masses and radii for the primary and secondary components are

M_{1} = 0.77 \pm 0.08

M

_{⊙}

,

R_{1} = 0.87 \pm 0.08

R

_{⊙}

and

M_{2} = 0.50 \pm 0.12

M

_{⊙}

,

R_{2} = 0.77 \pm 0.17

R

_{⊙}

for V523 And; and

M_{1} = 1.59 \pm 0.16

M

_{⊙}

,

R_{1} = 1.46 \pm 0.09

R

_{⊙}

and

M_{2} = 0.58 \pm 0.17

M

_{⊙}

,

R_{2} = 1.66 \pm 0.22

R

_{⊙}

for V543 And. Orbital period variations of the systems were analyzed using the O-C method. The O-C change of V523 And is discussed in terms of the magnetic activity cycle of one or both components and light travel time effect (LTTE) due to a third body in the system. Among these mechanisms, LTTE seems to be the most appropriate mechanism to explain the O-C variation of the system since the quadrupole moments of the primary and secondary components (

Δ Q

) were found to be in the order of

1 0^{49}

g cm

^{2}

. The O-C diagram of V543 And shows a downward parabolic trend, which suggests a secular period decrease with a rate of

0.080 \pm 0.012

s/year. The parabolic O-C variation of V543 And was interpreted in terms of the non-conservative mass transfer mechanism. According to this scenario, the range of possible values of the mass gain rate (

{\dot{M}}_{1}

) of the primary component of V543 And as well as the mass-loss rate (

\dot{M}

) of the system were found to be

1 0^{- 5}

–

1 0^{- 11}

M

_{⊙}

/year and

1 0^{- 6}

–

1 0^{- 8}

M

_{⊙}

/year, respectively. 相似文献

7.

First photometric investigation of two short-period eclipsing binaries ASAS J105115-6032.1 and GDS J1056047-604149

《New Astronomy》2022

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8.

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

《New Astronomy》2022

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9.

Gravitational wave background discovered by NANOGrav as evidence of a cyclic universe

《New Astronomy》2022

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10.

Study of axially symmetric viscous Ricci dark energy model in Brans–Dicke theory

《New Astronomy》2022

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11.

On the Sun’s distance from the center and the shape of the inner halo in the Galaxy: Gaia EDR3, HST and literature globular clusters

《New Astronomy》2022

A statistical method is used to derive both the Sun’s distance

r_{0}

from the Galactic Center (GC) and the 3D geometry of the inner (

<

25 kpc) halo. The spatial distribution of the 138 Gaia EDR3 globular clusters (GCs) with distances established on a combination of HST and literature data of Baumgardt and Vasiliev (2021) is explored. An estimate by using these ancient objects of the pressure-supported subsystem of the Galaxy with newly derived distances leads to the mean

r_{0} = 7.81 \pm 0.14

kpc. The distribution of GCs within 25 kpc is almost spherically symmetric, and has the shape of an ellipsoid with a major axis of its symmetry slightly elongated toward the Sun and two minor axes of almost the same length. The obtained scale-length ratio of the major axis to the minor axis in the plane and to the vertical axis of the ellipsoid is