J/MNRAS/446/1411 Trumpler 5 photometric BV catalog (Donati+, 2015)
The old, metal-poor, anticentre open cluster Trumpler 5.
Donati P., Cocozza G., Bragaglia A., Pancino E., Cantat-Gaudin T.,
Carrera R., Tosi M.
<Mon. Not. R. Astron. Soc. 446, 1411 (2015)>
=2015MNRAS.446.1411D 2015MNRAS.446.1411D
ADC_Keywords: Clusters, open ; Photometry, UBV ; Equivalent widths
Keywords: stars: abundances -
Hertzsprung-Russell and colour-magnitude diagrams -
open clusters and associations: general -
open clusters and associations: individual: Trumpler 5
Abstract:
As part of a long-term programme, we analyse the evolutionary status
and properties of the old and populous open cluster Trumpler 5 (Tr 5),
located in the Galactic anticentre direction, almost on the Galactic
plane. Tr 5 was observed with Wide Field Imager@MPG/ESO Telescope
using the Bessel U, B, and V filters. The cluster parameters have been
obtained using the synthetic colour-magnitude diagram (CMD) method,
i.e. the direct comparison of the observational CMD with a library of
synthetic CMDs generated with different stellar evolution sets
(Padova, FRANEC, and FST). Age, reddening, and distance are derived
through the synthetic CMD method using stellar evolutionary models
with subsolar metallicity (Z=0.004 or Z=0.006). Additional
spectroscopic observations with Ultraviolet VLT Echelle
Spectrograph@Very Large Telescope of three red clump stars of the
cluster were used to determine more robustly the chemical properties
of the cluster. Our analysis shows that Tr 5 has subsolar metallicity,
with [Fe/H]=-0.403±0.006 dex (derived from spectroscopy), age
between 2.9 and 4 Gyr (the lower age is found using stellar models
without core overshooting), reddening E(B-V) in the range 0.60-0.66
mag complicated by a differential pattern (of the order of
~±0.1mag), and distance modulus (m-M)0=12.4±0.1mag.
Description:
We combined high-quality photometric observations obtained with WFI
and high-resolution spectra obtained with FLAMES to determine accurate
cluster parameters, namely age, distance, reddening, and metallicity.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 125 39660 BV photometry and Diff. Reddening (DR) corrections
table7.dat 52 1364 Table of equivalent width measures for 3 stars
(204783, 204892 and 204893)
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See also:
J/A+AS/133/25 : CCD BVI photometry of Trumpler 5 (Kaluzny 1998)
J/MNRAS/349/641 : VIc, CT1 magnitudes in Trumpler 5 (Piatti+, 2004)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID [100001/892161] Identification index
8- 9 A2 --- --- [CH]
10- 11 A2 --- Chip Chip ID of WFI mosaic (1-8, E1-E8)
13- 20 F8.3 --- Xpos [0/2060] Cartesian coordinate of the chip
22- 29 F8.3 --- Ypos [0/4110] Cartesian coordinate of the chip
31- 40 F10.7 deg RAdeg Right Ascension coordinate J2000
42- 50 F9.7 deg DEdeg Declination coordinate J2000
52- 59 F8.5 arcmin Dist Distance from the centre in arcminutes
61- 66 F6.3 mag Vmag ?=99.999 V magnitude (1)
68- 72 F5.3 mag e_Vmag ?=9.999 Photometric error on V magnitude (1)
74- 79 F6.3 mag Bmag ?=99.999 B magnitude (1)
81- 85 F5.3 mag e_Bmag ?=9.999 Photometric error on B magnitude (1)
87- 93 F7.4 --- chi [0.4/12.4]?=9.9999 DAOPHOT χ parameter (2)
95-103 F9.4 --- sharp [-12.8/6.4] Sharpness parameter of DAOPHOT (2)
105-110 F6.3 mag DR [-0.1/0.2]?=99.999 DR correction in E(B-V)
112-117 F6.3 mag Vmagc ?=99.999 V magnitude corrected for DR
119-125 F7.3 mag B-Vc ?=9.999 B-V colour index corrected for DR
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Note (1): 99.999 and 9.999 values are adopted as "Not A Number"
Note (2): Sharpness and χ parameters of PSF fitting:
* the χ parameter is close to 1 for good point sources
* the "sharp" parameter is close to zero for isolated stars;
significantly negative for bad pixels and cosmic rays;
significantly positive for blended or non-stellar objects.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID Identification index of the stars
8- 15 F8.3 0.1nm lambda [4787/6796] Reference wavelength in Angstrom
17- 20 A4 --- Ion Atomic species
22- 26 F5.3 eV Ep Excitation potential
28- 33 F6.3 [-] loggf Logarithm of the oscillator strength
35- 40 F6.2 0.1pm EW Measured equivalent width in milli-Angstrom
42- 46 F5.2 0.1pm e_EW Error on equivalent width in milli-Angstrom
48- 52 F5.3 --- Q [0.3/2.2] Quality parameter of DAOSPEC
(large values are bad)
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Acknowledgements:
Paolo Donati, paolo.donati4(at)unibo.it
(End) Paolo Donati [INAF-OABO, Italy], Patricia Vannier [CDS] 03-Dec-2014