J/AJ/136/2441 Metallicity of RR0 Lyrae in the galactic bulge (Kunder+, 2008)
Metallicity analysis of MACHO Galactic bulge RR0 Lyrae stars from their
light curves.
Kunder A., Chaboyer B.
<Astron. J., 136, 2441-2452 (2008)>
=2008AJ....136.2441K 2008AJ....136.2441K
ADC_Keywords: Surveys ; Stars, variable ; Stars, population II ; Abundances
Keywords: Galaxy: center - stars: abundances - stars: distances -
stars: Population II - surveys
Abstract:
We present metallicities of 2690 RR0 Lyrae stars observed toward the
MACHO Survey fields in the Galactic bulge. These [Fe/H] values are
based upon an empirically-calibrated relationship that uses the
Fourier coefficients of the light curve and are accurate to ±0.2dex.
The majority of the RR0 Lyrae stars in our sample are located in the
Galactic bulge, but 255 RR0 stars are associated with the Sagittarius
(Sgr) dwarf galaxy.
Description:
The observations of the Galactic bulge were made by the MACHO team
with a 1.27m telescope at Mount Stromlo Observatory (MSO), Australia.
In total, seven seasons (1993-1999) of useful data were collected in
the 94 Galactic bulge fields.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 64 2435 Bulge RR0 Lyrae star metallicities
table2.dat 64 255 Sgr RR0 Lyrae star metallicities
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See also:
J/AJ/114/326 : MACHO Variables V. (Alcock+ 1997)
J/AJ/135/631 : Reddenings for the MACHO bulge RR0 Lyrae stars (Kunder+, 2008)
J/ApJ/598/597 : Frequency analysis of fundamental-mode RR Lyrae (Alcock+, 2003)
J/ApJ/631/906 : MACHO Galactic Bulge microlensing events (Thomas+, 2005)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- MACHO Star identification (FFF.NNNNN.NNNN)
17- 23 F7.3 deg GLON Galactic longitude
25- 30 F6.3 deg GLAT Galactic latitude
32- 41 F10.8 d Per Period
43- 47 F5.2 mag Vmag Average V band magnitude
49- 53 F5.2 mag Rmag Average R band magnitude
55- 59 F5.2 [Sun] [Fe/H] Metallicity from Jurcsik & Kovacs method;
error is ±0.2dex
61- 64 F4.2 --- Dm Deviation parameter introduced by
Jurcsik & Kovacs (1996, Cat. J/A+A/312/111)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 03-Jun-2011