CCD PHOTOMETRY AND EVOLUTIONARY STATUS OF THE HADS VARIABLE PT COM

被引：3

作者：

Alton, K. B. ^{[1
,2
]}

机构：

[1] Desert Blooms Observ, 70 Summit Ave, Cedar Knolls, NJ 07927 USA

[2] UnderOak Observ, 70 Summit Ave, Cedar Knolls, NJ 07927 USA

来源：

REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA | 2022年 / 58卷 / 01期

关键词：

stars: evolution; stars: oscillations; stars: variables: Delta Scuti; DELTA-SCUTI; STARS; ASTEROSEISMOLOGY; VARIABILITY; LUMINOSITY; PROGRAM; MODELS;

D O I：

10.22201/ia.01851101p.2022.58.01.09

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Multi-color (BVIc) CCD-derived photometric data were acquired from PT Com, a pulsating variable classified as a high amplitude delta Scuti-type system. Analysis of precise time-series lightcurve data was accomplished using discrete Fourier transformation which revealed a mean fundamental mode (f(0)) of oscillation at 12.178364 +/- 0.000083 d(-1) along with at least three other partial harmonics (2f(0), 3f(0) and 4f(0)). No other statistically significant frequency shared by all bandpasses was resolved following successive pre-whitening of each residual signal. A secular analysis of the fundamental pulse period since 1999 was facilitated by the addition of 35 new times-of-maximum. The evolutionary status, age and physical nature of PT Com were investigated using the PAdova & TRieste Stellar Evolution Code for generating stellar tracks and isochrones.

引用

页码：109 / 119

页数：11

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