Search of variable stars in the field of NGC 1960 and DOLIDGE 14. (arXiv:2101.00751v2 [astro-ph.SR] UPDATED)

<a href="http://arxiv.org/find/astro-ph/1/au:+Joshi_G/0/1/0/all/0/1">Gireesh C. Joshi</a>

Open clusters are host the several identical stars in the similar physical

and chemical environment. They become interesting objects to identify the

variable stars in the lower metallicity domain. In the present paper, the CCD

time series observations of cluster NGC1960 and DOLIDZE14 are performed to

search the variable stars within them. A comprehensive method of differential

phototometry and secondary standardization transformation is carried out to

search the stellar pulsation. A total of 18 and 4 short periodic variables

found in the field of NGC 1960 and DOLIDZE 14 respectively. Fast Fourier

transformation techniques are utilized to compute the pulsation. The period and

classification of 18 discovered variables of NGC 1960 are discussed, which

consist of one Planet transit variable, one RR Lyre-d variable, one Beta Cep

variable, one Gamma- Dor variable, one dual character Delta Scuti+RRC)

variable, two irregular variable, two s-Cepheid variables, four Delta Scuti

variables and five RRC variables. In the case of DOLIDZE 14, four discovered

variables consist of one Flare-type variable, one SX-Phenocs variable and two

Delta Scuti variables.

Open clusters are host the several identical stars in the similar physical

and chemical environment. They become interesting objects to identify the

variable stars in the lower metallicity domain. In the present paper, the CCD

time series observations of cluster NGC1960 and DOLIDZE14 are performed to

search the variable stars within them. A comprehensive method of differential

phototometry and secondary standardization transformation is carried out to

search the stellar pulsation. A total of 18 and 4 short periodic variables

found in the field of NGC 1960 and DOLIDZE 14 respectively. Fast Fourier

transformation techniques are utilized to compute the pulsation. The period and

classification of 18 discovered variables of NGC 1960 are discussed, which

consist of one Planet transit variable, one RR Lyre-d variable, one Beta Cep

variable, one Gamma- Dor variable, one dual character Delta Scuti+RRC)

variable, two irregular variable, two s-Cepheid variables, four Delta Scuti

variables and five RRC variables. In the case of DOLIDZE 14, four discovered

variables consist of one Flare-type variable, one SX-Phenocs variable and two

Delta Scuti variables.

http://arxiv.org/icons/sfx.gif