The MACHO project LMC variable star inventory. VII. The discovery of RV Tauri stars and new type II Cepheids in the large magellanic cloud

被引：95

作者：

Alcock, C ^{[1
]}

Allsman, RA

Alves, DR

Axelrod, TS

Becker, A

Bennett, DP

Cook, KH

Freeman, KC

Griest, K

Lawson, WA

Lehner, MJ

Marshall, SL

Minniti, D

Peterson, BA

Pollard, KR

Pratt, MR

Quinn, PJ

Rodgers, AW

Sutherland, W

Tomaney, A

Welch, DL

机构：

[1] Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Univ Calif Berkeley, Ctr Particle Astrophys, Berkeley, CA 94720 USA

[3] Australian Natl Univ, Supercomp Facil, Canberra, ACT 0200, Australia

[4] Univ Calif Davis, Dept Phys, Livermore, CA 95616 USA

[5] Australian Natl Univ, Mt Stromlo & Siding Spring Observ, Weston, ACT 2611, Australia

[6] Univ Washington, Dept Phys & Astron, Seattle, WA 98195 USA

[7] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[8] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[9] Univ New S Wales, Australian Def Force Acad, Dept Phys, Canberra, ACT 2600, Australia

[10] S African Astron Observ, ZA-7935 Observatory, South Africa

[11] Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand

[12] European So Observ, D-85748 Garching, Germany

[13] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[14] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

来源：

ASTRONOMICAL JOURNAL | 1998年 / 115卷 / 05期

关键词：

Magellanic Clouds; stars; Population II; variables; other;

D O I：

10.1086/300317

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of RV Tauri stars in the Large Magellanic Cloud (LMC). In light-and color-curve behavior, the RV Tauri stars appear to be a direct extension of the type II Cepheids to longer periods. A single period-luminosity-color relationship is seen to describe both the type II Cepheids and the RV Tauri stars in the LMC. We derive the relation V-0 = 17.89(+/- 0.20)-2.95(+/- 0.12) log P + 5.49(+/-0.35)[(V-R)(0)], which is valid for type II Cepheids and RV Tauri stars in the period range 0.9 < log P < 1.75. Assuming a distance modulus to the LMC of 18.5, the relation in terms of the absolute luminosities becomes M-V = -0.61(+/-0.20)-2.95(+/-0.12) log P + 5.49(+/-0.35)[(V-R)(0)].

引用

页码：1921 / 1933

页数：13

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