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J/A+A/459/489       Blue straggler stars in open clusters    (De Marchi+, 2006)

Search and analysis of blue straggler stars in open clusters. De Marchi F., De Angeli F., Piotto G., Carraro G., Davies M.B. <Astron. Astrophys. 459, 489 (2006)> =2006A&A...459..489D
ADC_Keywords: Clusters, open; Stars, blue ; Stars, peculiar Keywords: catalogs - stars: blue stragglers - Galaxy: globular clusters: general - Galaxy: open clusters and associations: general - stars: Hertzsprung-Russell (HR) and C-M diagrams Abstract: This paper presents a new homogeneous catalogue of blue straggler stars (BSS) in Galactic open clusters. Photometric data for 216 clusters were collected from the literature and 2782 BSS candidates were extracted from 76 of them. We found that the anticorrelation of BSS frequency vs. total magnitude identified in similar studies conducted on Galactic globular clusters extends to the open cluster regime: clusters with smaller total magnitude tend to have higher BSS frequencies. Moreover, a clear correlation between the BSS frequency (obtained normalising the total number of BSS either to the total cluster mass or, for the older clusters, to the total number of clump stars) and the age of the clusters was found. A simple model is developed here to try to explain this last and new result. The model allows us to ascertain the important effect played by mass loss in the evolution of open clusters. Description: Photometric catalogue of 2782 candidate blue straggler stars in 76 open clusters, candidates were selected from their position in colour magnitude diagram in 216 open clusters. We give for each cluster and for each candidate blue straggler the basic data. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 109 216 Open cluster parameters table3.dat 47 2782 Candidate blue stragglers in open clusters notes.dat 88 15 Individual notes refs.dat 104 220 References
See also: J/A+AS/109/375 : Blue stragglers in open clusters (Ahumada+, 1995) J/A+A/324/915 : Blue stragglers in M3 (Ferraro+ 1997) J/AJ/106/604 : Study of globular cluster NGC 6366 (Harris 1993) J/AJ/108/1786 : Blue stragglers + variable stars in M3 (Guhathakurta+, 1994) J/AJ/128/3019 : Pal 13 blue stragglers & main-sequence binaries (Clark+, 2004) J/ApJ/336/780 : gr photometry of NGC 5053 blue stragglers (Nemec+ 1989) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Cluster designation 16- 17 I2 h RAh Right ascension (J2000.0) 19- 20 I2 min RAm Right ascension (J2000.0) 22- 23 I2 s RAs Right ascension (J2000.0) 25 A1 --- DE- Declination sign (J2000.0) 26- 27 I2 deg DEd Declination (J2000.0) 29- 30 I2 arcmin DEm Declination (J2000.0) 32- 33 I2 arcsec DEs Declination (J2000.0) 35- 38 F4.2 mag E(B-V) Reddening 40- 44 F5.2 mag (m-M) Distance modulus 46- 50 F5.3 [yr] log(Age) Decimal logarithm of the age in years 52- 57 F6.2 arcmin Radius ?=- Apparent cluster radius 59- 61 I3 --- NBSS1 Number of blue stragglers candidates within the apparent radius of the cluster 63- 65 I3 --- NBSS2 Number of blue stragglers candidates (without limitation on radius) 67- 68 I2 --- Ncl Number of clump stars (without limitation on radius) 70- 73 A4 --- --- [CCD:] 74- 96 A23 --- Ref(1) References of the CCD photometries examined (see file refs.dat) (1) 97-101 A5 --- --- [pepg: ] 103-109 A7 --- Ref(2) References for photoelectric (pe) and photographic (pg) photometries examined (see file refs.dat) (1)
Note (1): For each cluster with candidates BSS, the data utilized for the analysis are taken from the first reference.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Cluster designation 15 A1 --- n_Name [*] indicates a note in file notes.dat 17- 21 I5 --- ID Identification number (1) 23- 29 F7.4 arcmin r Radial distance from the center 31- 36 F6.3 mag Vmag The V magnitude 38- 43 F6.3 mag col The (B-V) (or (V-I), or (b-y)) color index 45- 47 A3 --- Band Band of the color index (2)
Note (1): Numbering system adopted from the authors of the photometries Note (2): (V-I) colors for the clusters: Berkeley 66, King 7 Melotte 66, NGC 2627, NGC 7044, Saurer 1, Saurer 2, Saurer 3, Tombaugh 1. (b-y) colors for the cluster: NGC 752
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Cluster designation 16- 88 A73 --- Note Text of the note
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Ref Reference number 5- 23 A19 --- BibCode BibCode 25- 48 A24 --- Aut Author's name 50-104 A55 --- Com Comments
Acknowledgements: F. De Marchi, fda(at)
(End) Patricia Vannier [CDS] 28-Aug-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

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