Period-luminosity relations for Galactic Cepheid variables with independent distance measurements

被引：27

作者：

Ngeow, CC ^{[1
]}

Kanbur, SM ^{[1
]}

机构：

[1] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2004年 / 349卷 / 03期

关键词：

stars : fundamental parameters; Cepheids;

D O I：

10.1111/j.1365-2966.2004.07595.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper, we derive the period-luminosity (PL) relation for Galactic Cepheids with recent independent distance measurements from open cluster, Barnes-Evans surface brightness, interferometry and Hubble Space Telescope astrometry techniques. Our PL relation confirms the results from recent works, which showed that the Galactic Cepheids follow a different PL relation to their Large Magellanic Cloud (LMC) counterparts. Our results also show that the slope of the Galactic PL relation is inconsistent with the LMC slope with more than 95 per cent confidence level. We apply this Galactic PL relation to find the distance to NGC 4258. Our result of mu(o) = 29.49 +/- 0.06 mag (random error) agrees at the similar to1.4sigma level with the geometrical distance of mu(geo) = 29.28 +/- 0.15 mag from water maser measurements.

引用

页码：1130 / 1136

页数：7

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