J/A+A/564/A42 Δa-photometry in 10 open clusters (Paunzen+, 2014)
Photoelectric search for peculiar stars in open clusters.
XV. Feinstein 1, NGC 2168, NGC 2323, NGC 2437, NGC 2547, NGC 4103,
NGC 6025, NGC 6633, Stock 2, and Trumpler 2.
Paunzen E., Netopil M., Maitzen H.M., Pavlovski K., Schnell A., Zejda M.
<Astron. Astrophys. 564, A42 (2014)>
=2014A&A...564A..42P 2014A&A...564A..42P
ADC_Keywords: Clusters, open ; Stars, peculiar ; Photometry
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 ten young to
intermediate age open clusters in the Δa photometric system.
Description:
Within the sample of ten open clusters, we have investigated 304
objects using the narrow band, three filter Δa photometric
system (Maitzen 1976A&A....51..223M 1976A&A....51..223M), resulting in the detection
of fifteen peculiar stars.
Objects:
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RA (2000) DE Designation(s) (file)
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11 05 56 -59 49 00 Cl Feinstein 1 = C 1103-595 (table4.dat)
06 09 00 +24 21 00 NGC 2168 = C 0605+243 (table5.dat)
07 02 42 -08 23 00 NGC 2323 = C 0700-082 (table6.dat)
07 41 46 -14 48 36 NGC 2437 = C 0739-147 (table7.dat)
08 10 09 -49 12 54 NGC 2547 = C 0809-491 (table8.dat)
12 06 40 -61 15 00 NGC 4103 = C 1204-609 (table9.dat)
16 03 17 -60 25 54 NGC 6025 = C 1559-603 (table10.dat)
18 27 15 +06 30 30 NGC 6633 = C 1825+065 (table11.dat)
02 15 00 +59 16 00 Cl Stock 2 = C 0211+590 (table12.dat)
02 37 18 +55 59 00 Cl Trumpler 2 = C 0233+557 (table13.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 38 28 Observed program stars of Feinstein 1
table5.dat 38 26 Observed program stars of NGC 2168
table6.dat 38 18 Observed program stars of NGC 2323
table7.dat 38 48 Observed program stars of NGC 2437
table8.dat 38 33 Observed program stars of NGC 2547
table9.dat 38 34 Observed program stars of NGC 4103
table10.dat 38 28 Observed program stars of NGC 6025
table11.dat 38 40 Observed program stars of NGC 6633
table12.dat 38 34 Observed program stars of Stock 2
table13.dat 38 14 Observed program stars of Trumpler 2
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See also:
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/395/823 : 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)
J/A+A/454/171 : CCD Δa-photometry of 8 open clusters (Paunzen+, 2006)
Byte-by-byte Description of file: table*.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- No Notation according to WEBDA
6- 10 I5 mmag amag Mean Δa index (1)
12- 13 I2 mmag e_amag [0/24] rms uncertainty on a
15- 16 I2 --- o_amag [1/43] Number of observations
18- 22 I5 mmag acmag Corrected a index (1)
24- 28 I5 mmag (B-V)0 Mean (B-V)0 value
30- 34 I5 mmag B-V Adopted reddening E(B-V)
36- 38 I3 --- Memb [0/100] Membership probability
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Note (1): the intrinsic peculiarity index Δa is defined as
Δ=a-a0, where a0 is the a index of non-peculiar stars
(the locus of a0 is called the "normality" line). The effect
of the reddening in removed in the corrected a index.
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Acknowledgements:
Ernst Paunzen, epaunzen(at)physics.muni.cz
References:
Maitzen & Hensberge Paper I 1981A&A....96..151M 1981A&A....96..151M
Maitzen & Vogt Paper II 1983A&A...123...48M 1983A&A...123...48M
Maitzen Paper III 1982A&A...115..275M 1982A&A...115..275M
Maitzen & Wood Paper IV 1983A&A...126...80M 1983A&A...126...80M
Maitzen & Schneider Paper V 1984A&A...138..189M 1984A&A...138..189M
Maitzen Paper VI 1985A&AS...62..129M 1985A&AS...62..129M
Maitzen et al., Paper VII 1986A&AS...65..497M 1986A&AS...65..497M
Maitzen & Catalano Paper VIII 1986A&AS...66...37M 1986A&AS...66...37M
Maitzen & Pavlovski Paper IX 1987A&A...178..313M 1987A&A...178..313M
Jenkner & Maitzen Paper X 1987A&AS...71..255J 1987A&AS...71..255J
Maitzen & Schneider Paper XI 1987A&AS...71..431M 1987A&AS...71..431M
Maitzen & Pavlovski Paper XII 1987A&AS...71..441M 1987A&AS...71..441M
Maitzen et al., Paper XIII 1988A&AS...75..391M 1988A&AS...75..391M
Maitzen, Paper XIV 1993A&AS..102....1M 1993A&AS..102....1M
(End) Patricia Vannier [CDS] 26-Mar-2014