PHOTOMETRY AND LINE-PROFILE VARIATIONS OF THE PECULIAR VARIABLE GAMMA-DORADUS

被引：23

作者：

BALONA, LA ^{[1
]}

HEARNSHAW, JB ^{[1
]}

KOEN, C ^{[1
]}

COLLIER, A ^{[1
]}

MACHI, I ^{[1
]}

MKHOSI, M ^{[1
]}

STEENBERG, C ^{[1
]}

机构：

[1] UNIV CANTERBURY,DEPT PHYS & ASTRON,MT JOHN UNIV OBSERV,CHRISTCHURCH 1,NEW ZEALAND

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1994年 / 267卷 / 01期

关键词：

CIRCUMSTELLAR MATTER; STARS; INDIVIDUAL; GAMMA-DOR; OSCILLATIONS; VARIABLES; OTHER;

D O I：

10.1093/mnras/267.1.103

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Gamma Doradus is an early F dwarf with a circumstellar dust shell. It is variable in light with two nearly equal periods of 0.75701 and 0.73339 d, or possibly a double-wave variation with a single period of 1.4668 d. The two periods are found to be coherent over 1.2 yr with no indication of period changes or amplitude variations, but there is an unexplained residual scatter. No additional coherent periodicities are found. Significant colour variations, which can be interpreted as temperature changes, are present. High-resolution spectroscopic observations obtained during two nights show distinct line profile changes characteristic of non-radial pulsation or starspots, but no significant radial velocity variations. This star may be an example of a new class of pulsating variable.

引用

页码：103 / 110

页数：8

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