Access to Astronomical Catalogues

← Click to display the menu
J/AJ/130/1916         Metallicity indices in open clusters     (Marshall+, 2005)

Survey for transiting extrasolar planets in stellar systems. II. Spectrophotometry and metallicities of open clusters. Marshall J.L., Burke C.J., Depoy D.L., Gould A., Kollmeier J.A. <Astron. J., 130, 1916-1928 (2005)> =2005AJ....130.1916M
ADC_Keywords: Abundances ; Clusters, open Keywords: Galaxy: abundances - Galaxy: kinematics and dynamics - open clusters and associations: general - stars: abundances Abstract: We present metallicity estimates for seven open clusters based on spectrophotometric indices from moderate-resolution spectroscopy. Observations of field giants of known metallicity provide a correlation between the spectroscopic indices and the metallicity of open cluster giants. We use 2 analysis to fit the relation of spectrophotometric indices to metallicity in field giants. The resulting function allows an estimate of the target-cluster giants' metallicities with an error in the method of ±0.08 dex. We derive the following metallicities for the seven open clusters: NGC 1245, [M/H]=-0.14±0.04; NGC 2099, [M/H]=+0.05±0.05; NGC 2324, [M/H]=-0.06±0.04; NGC 2539, [M/H]=-0.04±0.03; NGC 2682 (M67), [M/H]=-0.05±0.02; NGC 6705, [M/H]=+0.14±0.08; NGC 6819, [M/H]=-0.07±0.12. These metallicity estimates will be useful in planning future extrasolar planet transit searches, since planets may form more readily in metal-rich environments. Description: The spectral data were obtained at the MDM Observatory using the Boller & Chivens CCD Spectrograph (CCDS). We obtained one night of data (2002 January 31) on the 2.4m Hiltner Telescope, while the other seven nights of data (during 2002 March 21-April 1) were obtained on the 1.3m McGraw-Hill Telescope. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 104 56 Metallicity indices for calibration stars table3.dat 104 35 Metallicity indices for target-cluster stars
See also: J/A+A/376/561 : Rc light curves of 7 variables in M37 (Kiss+, 2001) J/A+A/307/80 : Velocities of red giants in NGC 2099 (Mermilliod+ 1996) J/A+A/418/979 : VI and CT1 photometry in NGC 2324 field (Piatti+, 2004) J/A+A/361/945 : UBV photometry in open cluster NGC 2539 (Lapasset+, 2000) J/AJ/106/181 : CCD photometry of open cluster M67 (Montgomery+ 1993) III/221 : Catalogue of [Fe/H] of F, G, K stars (Cayrel de Strobel+ 2001) WEBDA : Byte-by-byte Description of file: table2.dat table3.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Star name (1) 15- 24 A10 "M/D/Y" ObsDate Date of the observation 26- 30 F5.3 mag (B-V)0 The (B-V)_0_ color index (2) 32- 38 F7.4 [Sun] [Fe/H] ? Metallicity (only in table2.dat) (3) 40- 44 F5.3 --- Ca4226 The Ca4226 index (4) 46- 50 F5.3 --- CN4216 The CN4216 index (4) 52- 56 F5.3 --- Fe4065 The Fe4065 index (4) 58- 62 F5.3 --- Fe4530 The Fe4530 index (4) 64- 68 F5.3 --- Fe4680 The Fe4680 index (4) 70- 74 F5.3 --- Fe4920 The Fe4920 index (4) 76- 80 F5.3 --- Fe5011 The Fe5011 index (4) 82- 86 F5.3 --- Fe5270 The Fe5270 index (4) 88- 92 F5.3 --- Fe5335 The Fe5335 index (4) 94- 98 F5.3 --- Gband The Gband index (4) 100-104 F5.3 --- Mg The Mg index (4)
Note (1): Identifications as given in the WEBDA database. Note (2): For table2.dat only: colors taken from the Hipparcos Catalog ESA (1997, Cat. I/239). For table3.dat only: Sources for photometry and reddening: NGC 1245: (B-V) and E(B-V)=0.25 from Burke et al. (2004AJ....127.2382B); NGC 2099: (B-V) from Kiss et al. (2001, Cat. J/A+A/376/561) (via WEBDA), E(B-V)=0.29 Mermilliod et al.(1996, Cat. J/A+A/307/80); NGC 2324: (B-V) from Kyeong et al. (2001JKAS...34..143K) (via WEBDA), E(B-V)=0.25 Piatti et al. (2004, Cat. J/A+A/418/979); NGC 2539: (B-V) and E(B-V)=0.06 from Lapasset et al. (2000, Cat. J/A+A/361/945); NGC 2682: (B-V) and E(B-V)=0.05 from Montgomery et al. (1993, Cat. J/AJ/106/181); NGC 6705: (B-V) from Stetson (2000PASP..112..925S) (via WEBDA), E(B-V)=0.43 Sung et al. (1999MNRAS.310..982S) NGC 6819: (B-V) and E(B-V)=0.16 from Rosvick & Vandenberg (1998AJ....115.1516R) ((B-V) via WEBDA). Note (3): Metallicities derived from Cayrel de Strobel et al. (2001, Cat. III/221), as described in Section 3. Note (4): Indexes use the following bandpasses (see table 1 of the paper for a more accurate definition): ------------------------------------------- Index Bandpass(Å) Species measured ------------------------------------------- Fe4065 4033.50-4085.00 FeI, MnI, SrII CN4216 4144.00-4175.75 CN Ca4226 4207.00-4245.00 CaI Gband 4245.00-4320.00 CH, FeI Fe4530 4520.00-4571.25 FeI, TiI, TiII Fe4680 4636.00-4723.00 FeI, CrI, NiI, MgI Fe4920 4900.00-4940.00 FeI Fe5011 4976.00-5051.00 FeI, TiI, FeII, NiI Mg 5130.00-5200.00 Mgb + MbH Fe5270 5248.00-5286.75 FeI, CaI Fe5335 5314.75-5353.50 FeI, CrI -------------------------------------------
History: From electronic version of the journal References: Burke et al., Paper I 2004AJ....127.2382B
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 20-Feb-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service