J/A+A/372/879 JKBV photometry of NGC 2141 (Carraro+, 2001)
An optical and near infrared study of the old open cluster NGC 2141
Carraro G., Hassan, S.M., Ortolani S., Vallenari A.
<Astron. Astrophys. 372, 879 (2001)>
=2001A&A...372..879C 2001A&A...372..879C
ADC_Keywords: Clusters, open ; Photometry, UBV ; Photometry, infrared
Keywords: open clusters and associations: NGC 2141: individual -
techniques: photometric
Abstract:
We report CCD optical (B and V passbands) and near IR (J and K bands)
observations in the region of the old open cluster NGC 2141. By
combining the two sets of photometry (500 stars in common) we derive
new estimates of the cluster's fundamental parameters. We confirm that
the cluster is 2.5Gyrs old, but, with respect to previous
investigations, we obtain a slightly larger reddening (E(B-V)=0.40),
and a slightly shorter distance (3.8kpc) from the Sun. Finally, we
present the Luminosity Function (LF) in the V band, which is another
age indicator. We provide a good fit for the age range inferred from
isochrones by assuming the Kroupa et al. (1993MNRAS.262..545K 1993MNRAS.262..545K) IMF up
to MV=5.0. We interpret the disagreement at fainter magnitudes as
evidence of mass segregation.
Objects:
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RA (2000) DE Designation(s)
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06 03 58.2 +10 26 39 NGC 2141
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 76 893 Photometry
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Identification number
5- 15 E11.5 pix Xpos ? X coordinates (1)
17- 27 E11.5 pix Ypos ? Y coordinates (1)
29- 39 E11.5 --- Kmag ? K band magnitude
41- 52 E12.5 --- J-K ? (J-K) color index
54- 64 E11.5 --- Vmag ? V band magnitude
66- 76 E11.5 --- B-V ? (B-V) color index
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Note (1): The scale is : 1"/pixel
The orientation is : North at increasing Y, West at increasing X
The center of the frame (200 pixels, 200 pixels ) corresponds
to RA = 06 02 58.2, DE = +10 26 39 (2000)
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Acknowledgements: Giovanni Carraro
(End) Patricia Bauer [CDS] 14-Jun-2001