J/A+A/463/789 Blue stragglers in open clusters (Ahumada+, 2007)
New catalogue of blue stragglers in open clusters.
Ahumada J.A., Lapasset E.
<Astron. Astrophys. 463, 789 (2007)>
=2007A&A...463..789A 2007A&A...463..789A
ADC_Keywords: Clusters, open; Stars, blue ; Stars, peculiar ; Photometry, UBVRI
Keywords: catalogues - open clusters and associations: general -
stars: blue stragglers
Abstract:
We present a catalogue of blue-straggler candidates in galactic open
clusters. It is based on the inspection of the colour-magnitude
diagrams of the clusters, and it updates and supersedes the first
version (Ahumada & Lapasset, 1995, Cat. J/A+AS/109/375). A new
bibliographical search was made for each cluster, and the resulting
information is organised into two tables. Some methodological aspects
have been revised, in particular those concerning the delimitation of
the area in the diagrams where the stragglers are selected. A total of
1887 blue-straggler candidates have been found in 427 open clusters of
all ages, doubling the original number. The catalogued stars are
classified into two categories mainly according to membership
information.
Description:
An amount of 1887 blue-straggler candidates were selected from their
position in the colour-magnitude diagram in 427 galactic open clusters
of all ages. A set of basic data is given for every cluster and blue
straggler. This work is an update of the catalogue presented in
1995, Cat. J/A+AS/109/375 by the same authors.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table8.dat 61 427 Open cluster data
table9.dat 73 1887 Blue stragglers in open clusters
notes.dat 80 749 Individual notes
refs.dat 157 439 References
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See also:
J/A+AS/109/375 : Blue stragglers in open clusters (Ahumada+, 1995)
Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Cluster designation
15- 16 I2 h RAh Right ascension (J2000.0)
18- 21 F4.1 min RAm Right ascension (J2000.0)
23 A1 --- DE- Declination sign (J2000.0)
24- 25 I2 deg DEd Declination (J2000.0)
27- 28 I2 arcmin DEm Declination (J2000.0)
30- 33 F4.2 mag E(B-V) Reddening
35- 39 F5.2 [yr] log(Age) Decimal logarithm of the age in years
41- 45 F5.1 arcmin ApDiam Apparent cluster diameter
47- 50 I4 --- Nstars Number of stars on the main sequence to two
magnitudes below the turnoff
51 A1 --- u_Nstars Uncertainty flag on Nstars
53- 55 I3 --- NBS Number of blue straggler candidates
57- 59 I3 --- r_Name Photometry source
61 A1 --- n_Name [*] indicates a note detailed in notes.dat
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Cluster designation
15- 22 A8 --- BS1 Blue straggler designation (according to the
referenced photometry)
24- 28 I5 --- BS2 ? Blue straggler designation (according to the
WEBDA database)
30 I1 --- Class [1,2] Blue straggler classification (2)
32 A1 --- Massive [M] M: possible massive blue straggler, see
the criteria explained in the paper.
34- 38 F5.2 mag Vmag V magnitude
40- 44 F5.2 mag B-V ? B-V colour index
45 A1 --- u_B-V Uncertainty flag on B-V
47- 51 F5.2 mag U-B ? U-B colour-index
52 A1 --- u_U-B Uncertainty flag on U-B
54- 58 F5.2 mag V-I ? V-I colour-index
60- 62 A3 --- Phot Photometry in which the magnitudes are given (1)
64- 67 F4.2 --- r/R ? Location from cluster center (relative radius)
73 A1 --- Note [*] indicates a note detailed in notes.dat
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Note (1): The type of photometry is defined as follows:
pe = photoelectric,
pg = photographic,
CCD = charge-coupled-device
Note (2): Class 1 are 'bona-fide' stragglers; details of the criteria
are explained in the paper.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Cluster name, repeated when several lines
15- 80 A66 --- Text Text of note
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Ref Reference code
5- 23 A19 --- BibCode BibCode
25- 49 A25 --- Aut Author's name
51-157 A107 --- Com Comments
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Acknowledgements:
Javier A. Ahumada, javier(at)oac.uncor.edu
(End) Patricia Vannier [CDS] 24-Nov-2006