J/A+A/454/171 CCD Δa-photometry of 8 open clusters (Paunzen+, 2006)
CCD photometric search for peculiar stars in open clusters.
VII. Berkeley 11, Berkeley 94, Haffner 15, Lynga 1, NGC 6031, NGC 6405,
NGC 6834 and Ruprecht 130.
Paunzen E., Netopil M., Iliev I.K., Maitzen H.M., Claret A., Pintado O.I.
<Astron. Astrophys., 454, 171-178 (2006)>
=2006A&A...454..171P 2006A&A...454..171P
ADC_Keywords: Clusters, open ; Photometry, CCD ; Stars, peculiar
Keywords: stars: chemically peculiar - stars: early-type -
techniques: photometric - open clusters and associations: general
Abstract:
The detection of magnetic chemically peculiar (CP2) stars in
open clusters of the Milky Way can be used to study the influence
of different galactic environments on the (non-)presence of
peculiarities, which has to be taken into account in stellar evolution
models. Furthermore it is still unknown if the CP2 phenomenon evolves,
i.e. does the strength of the peculiarity feature at 5200Å increase
or decrease with age. Methods. We have observed eight young to
intermediate age open clusters in the Δa photometric system.
Description:
Within the sample of eight open clusters, we have investigated 1698
objects using the narrow band, three filter Delta a photometric system
resulting in the detection of twenty three bona-fide magnetic
chemically peculiar (CP) stars, eight Be/Ae and eight metal-weak
stars.
Objects:
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RA (2000) DE Designation(s)
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04 20 36 +44 55.0 Cl Berkeley 11 = C 0417+448
22 22 54.0 +55 52 24 Cl Berkeley 94 = C 2220+556
07 45 30.0 -32 50 30 Cl Haffner 15 = C 0743-326
14 00 07.0 -62 09 42 Cl Lynga 1 = C 1356-619
16 07 51.4 -54 03 03 NGC 6031 = C 1603-539
17 40 18 -32 12.0 NGC 6405 = M 6
19 52 12 +29 25.0 NGC 6834 = C 1950+292
17 47 36 -30 07.0 Cl Ruprecht 130 = C 1744-301
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 83 66 Observed program stars of Berkeley 11
table6.dat 83 115 Observed program stars of Berkeley 94
table7.dat 83 329 Observed program stars of Haffner 15
table8.dat 83 166 Observed program stars of Lynga 1
table9.dat 83 243 Observed program stars of NGC 6031
table10.dat 83 167 Observed program stars of NGC 6405
table11.dat 83 251 Observed program stars of NGC 6834
table12.dat 83 295 Observed program stars of Ruprecht 130
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See also:
J/A+A/371/L5 : CCD Δa-photometry of NGC 1866 (Maitzen+, 2001)
J/A+A/373/153 : CCD Δa-photometry of 5 open clusters (Paunzen+, 2001)
J/A+A/385/867 : CCD Δa-photometry of 5 open clusters (Paunzen+, 2002)
J/A+A/412/721 : CCD Δa-photometry of 5 open clusters (Paunzen+, 2003)
J/A+A/443/157 : CCD photometry in 6 open clusters (Paunzen+, 2005)
Byte-by-byte Description of file: table*.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- No1 Notation for stars sorted after X and Y
8- 13 I6 --- No2 ? Notation according to WEBDA
15- 21 F7.1 pix Xpos X-coordinate
23- 29 F7.1 pix Ypos Y-coordinate
33- 37 F5.2 mag Vmag Mean V value
39- 44 F6.3 mag B-V ? Mean B-V value (not in table6)
47- 52 F6.3 mag amag Mean a index
54- 58 F5.3 mag e_amag rms uncertainty on a
61- 66 F6.3 mag g1-y Mean (g1-y) index
68- 72 F5.3 mag e_g1-y rms uncertainty on (g1-y)
75- 80 F6.3 mag da(g1-y) ?=99.999 Deviation from cluster line (Delta a)
82- 83 I2 --- Obs Number of observations
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Acknowledgements: Ernst Paunzen, Ernst.Paunzen(at)univie.ac.at
References:
Paunzen et al., Paper I 2000A&AS..147...99B 2000A&AS..147...99B
Paunzen et al., Paper II 2001A&A...373..153P 2001A&A...373..153P, Cat. J/A+A/373/153
Paunzen et al., Paper III 2002A&A...385..867P 2002A&A...385..867P, Cat. J/A+A/385/867
Paunzen et al., Paper IV 2002A&A...395..823P 2002A&A...395..823P, Cat. J/A+A/395/823
Paunzen et al., Paper V 2003A&A...412..721P 2003A&A...412..721P, Cat. J/A+A/412/721
Paunzen et al., Paper VI 2005A&A...443..157P 2005A&A...443..157P, Cat. J/A+A/443/157
(End) Patricia Vannier [CDS] 12-Aug-2006