J/AN/345/40054 Ruprecht 1 and Ruprecht 171 members (Cakmak+, 2024)
Photometric and kinematic studies of open clusters Ruprecht 1 and Ruprecht 171.
Cakmak H., Yontan T., Bilir S., Banks T.S., Michel R., Soydugan E., Koc S.,
Ercay H.
<Astron. Nachr. 345, e240054 (2024)>
=2024AN....345E0054C 2024AN....345E0054C (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Photometry, UBV ; Proper motions;
Parallaxes, trigonometric
Keywords: Galaxy: open clusters and associations: individual: Ruprecht 1 -
Galaxy: open clusters and associations: individual: Ruprecht 171 -
Galaxy: disk - stars: Hertzsprung-Russell and color-magnitude diagrams
Abstract:
This study outlines a detailed investigation using CCD UBV and Gaia
DR3 data sets of the two open clusters Ruprecht 1 (Rup-1) and
Ruprecht 171 (Rup-171). Fundamental astrophysical parameters such as color
excesses, photometric metallicities, ages, and isochrone distances were
based on UBV-data analyses, whereas membership probability calculations,
structural and astrophysical parameters, as well as the kinematic
analyses were based on Gaia DR3-data. We identified 74 and 596 stars as
the most probable cluster members with membership probabilities over 50%
for Rup-1 and Rup-171, respectively. The color excesses E(B-V) were
obtained as 0.166±0.022 and 0.301±0.027mag for Rup-1 and Rup-171,
respectively. Photometric metallicity analyses were performed by
considering F-G type main-sequence member stars and found to be
[Fe/H]=-0.09±0.16 and [Fe/H]=-0.20±0.20dex for Rup-1 and Rup-171,
respectively. Ages and distances were based on both UBV and Gaia-data
analyses; according to isochrone-fitting these values were estimated to be
t=580±60Myr, d=1469±57pc for Rup-1 and t=2700±200Myr,
d=1509±69pc for Rup-171. The present-day mass function slope of
Rup-1 was estimated as 1.26±0.32 and Rup-171 as 1.53±1.49.
Galactic orbit integration analyses showed that both of the clusters
might be formed outside the solar circle.
Description:
The observations of these two clusters were carried out at the San
Pedro Martir Observatory,as part of an ongoing UBVRI photometric
survey of Galactic stellar clusters started on September 2009. Up to
date 1496 observations of 1385 open clusters and 149 observations of
87 globular clusters have been carried out. The publication of the
details of this survey is in preparation by Raul Michel. The 84cm
(f/15) Ritchey-Chretien telescope was employed in combination
with the Mexman filter wheel.
Objects:
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RA (2000) DE Designation(s)
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06 36 20.16 -14 09 25.2 Ruprecht 1 = [KPS2012] MWSC 0929
18 32 02.87 -16 03 43.2 Ruprecht 171 = [KPS2012] MWSC 2944
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 147 556 Catalogues for Rup-1 and Rup-171
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See also:
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Cluster Cluster identifier
14- 16 I3 --- Seq [1/2474] Sequential identifier in Cluster
18- 19 I2 h RAh Right Ascension (ICRS) at Ep=2016
21- 22 I2 min RAm Right Ascension (ICRS) at Ep=2016
24- 28 F5.2 s RAs Right Ascension (ICRS) at Ep=2016
30 A1 --- DE- Declination sign (ICRS) at Ep=2016
31- 32 I2 deg DEd Declination (ICRS) at Ep=2016
34- 35 I2 arcmin DEm Declination (ICRS) at Ep=2016
37- 41 F5.2 arcsec DEs Declination (ICRS) at Ep=2016
43- 48 F6.3 mag Vmag San Pedro Martir Observatory/84cm
V band magnitude
50- 54 F5.3 mag e_Vmag Uncertainty in Vmag
56- 60 F5.3 mag U-B ?=- San Pedro Martir Observatory/84cm
U-B Color
62- 66 F5.3 mag e_U-B ?=- Uncertainty in U-B
68- 72 F5.3 mag B-V San Pedro Martir Observatory/84cm B-V Color
74- 78 F5.3 mag e_B-V ?=- Uncertainty in B-V
80- 85 F6.3 mag Gmag Gaia DR3 G band magnitude
87- 91 F5.3 mag e_Gmag Uncertainty in Gmag
93- 97 F5.3 mag BP-RP ?=- Gaia DR3 GBP-GRP color
99-103 F5.3 mag e_BP-RP ?=- Uncertainty in GBP-GRP
105-110 F6.3 mas/yr pmRA Gaia DR3 proper motion in Right Ascension
112-116 F5.3 mas/yr e_pmRA Uncertainty in pmRA
118-123 F6.3 mas/yr pmDE Gaia DR3 proper motion in Declination
125-129 F5.3 mas/yr e_pmDE Uncertainty in pmDE
131-136 F6.3 mag plx Gaia DR3 parallax
138-142 F5.3 mag e_plx Uncertainty in plx
144-147 F4.2 --- Pmemb [0/1] Membership probability
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Acknowledgements:
Hikmet Cakmak, hcakmak(at)istanbul.edu.tr
(End) Patricia Vannier [CDS] 18-Dec-2024