The slope of the RR Lyrae variables Mv, f[Fe/H] relation

被引：15

作者：

McNamara, DH ^{[1
]}

机构：

[1] Brigham Young Univ, Dept Phys & Astron, Provo, UT 84602 USA

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 1999年 / 111卷 / 758期

关键词：

D O I：

10.1086/316352

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss the slope of the RR Lyrae variables M-v,[Fe/H] relation by two independent methods. We show that the slope is 0.32 if Baade-Wesselink M-v values are used only for stars with [Fe/H] > - 1.5. Because the metal abundances of the variables are constant or nearly so for a large range of periods (the Oosterhoff I variables with log P values in the range -0.29 to -0.215), a flat section in the M-v,[Fe/H] relation is produced that tends to reduce the slope if stars with log [Fe/H] < - 1.5 are included in the solution. An analysis of data on RR Lyrae stars in the Galactic bulge yields a slope of similar to 0.31.

引用

页码：489 / 493

页数：5

共 20 条

[1] The RR Lyrae population of the Galactic bulge from the macho database: Mean colors and magnitudes [J].

Alcock, C ;

Allsman, RA ;

Alves, DR ;

Axelrod, TS ;

Becker, AC ;

Basu, A ;

Baskett, L ;

Bennett, DP ;

Cook, KH ;

Freeman, KC ;

Griest, K ;

Lehner, MJ ;

Marshall, SL ;

Minniti, D ;

Peterson, BA ;

Pratt, MR ;

Quinn, PJ ;

Rodgers, AW ;

Stubbs, CW ;

Sutherland, W ;

Vandehei, T ;

Welch, DL .

ASTROPHYSICAL JOURNAL, 1998, 492 (01) :190-199

[2] THE REDDENING OF TYPE-AB RR-LYRAE STARS [J].

BLANCO, VM .

ASTRONOMICAL JOURNAL, 1992, 104 (02) :734-747

[3] METAL ABUNDANCES OF RR LYRAE STARS IN GALACTIC GLOBULAR CLUSTERS [J].

BUTLER, D .

ASTROPHYSICAL JOURNAL, 1975, 200 (01) :68-81

[4] STUDIES OF RR LYRAE VARIABLE-STARS IN UNUSUAL GLOBULAR CLUSTER OMEGA CENTAURI .1. SPECTROSCOPIC OBSERVATIONS [J].

BUTLER, D ;

DICKENS, RJ ;

EPPS, E .

ASTROPHYSICAL JOURNAL, 1978, 225 (01) :148-164

[5] ON THE ABSOLUTE MAGNITUDE OF RR LYRAE STARS - UU CETI, RV PHOENICIS, AND W-TUCANAE [J].

CACCIARI, C ;

CLEMENTINI, G ;

FERNLEY, JA .

ASTROPHYSICAL JOURNAL, 1992, 396 (01) :219-237

[6] The period-magnitude diagram of RR Lyrae stars .1. The controversy about the distance scale [J].

Caputo, F .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 284 (04) :994-1000

[7] RR Lyraes, Galactic and extragalactic distances, and the age of the oldest globular clusters [J].

Feast, MW .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 284 (03) :761-766

[8] The slope of the RR Lyrae Mν-[Fe/H] relation [J].

Fernley, J ;

Carney, BW ;

Skillen, I ;

Cacciari, C ;

Janes, K .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1998, 293 (03) :L61-L64

[9] THE BAADE-WESSELINK METHOD AND THE DISTANCES TO RR LYRAE STARS .7. THE FIELD STARS SW ANDROMEDAE AND DX DELPHINI AND A COMPARISON OF RECENT BAADE-WESSELINK ANALYSES [J].

JONES, RV ;

CARNEY, BW ;

STORM, J ;

LATHAM, DW .

ASTROPHYSICAL JOURNAL, 1992, 386 (02) :646-662

[10] THE METALLICITIES AND KINEMATICS OF RR LYRAE VARIABLES .1. NEW OBSERVATIONS OF LOCAL STARS [J].

LAYDEN, AC .

ASTRONOMICAL JOURNAL, 1994, 108 (03) :1016-1041

← 1 2 →