J/AJ/159/246 WIYN open cluster study. LXXX. Photometry of NGC 7142 (Sun+, 2020)
WIYN open cluster study LXXX: HDI CCD UBVRI photometry of the old open cluster
NGC 7142 and comparison to M67.
Sun Q., Deliyannis C.P., Twarog B.A., Anthony-twarog B.J., Steinhauer A.
<Astron. J., 159, 246-246 (2020)>
=2020AJ....159..246S 2020AJ....159..246S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open; Photometry, UBVRI; Colors
Keywords: Open star clusters; Johnson photometry; Metallicity
Interstellar reddening; Stellar ages; Stellar distance
Abstract:
We present UBVRI photometry of 8702 stars in a 0.5x0.5° field in
the direction of NGC7142, taken with the Half Degree Imager at the
WIYN 0.9m telescope, to improve knowledge of this cluster's basic
parameters. Our photometry spans the ranges 10.6-20.4mag in U,
10.6-22.0mag in B, 10.0-21.8mag in V, 9.2-20.7mag in R, and
8.5-19.9mag in I. Using color-color diagrams that employ all four
color combinations that include U, versus B-V, we derive a
reddening-metallicity relation for the cluster, with preferred values
E(B-V)=0.338±0.031mag for the left-edge fiducial of the main
sequence and [Fe/H]=0.0±0.1dex, where the Hyades cluster has been
used as an unreddened reference cluster, the extinction relations of
Cardelli have been employed, and the metallicity dependence of the
Yonsei-Yale (Y2) isochrones has been assumed. Comparison of our data
to the Y2 isochrones in multiple color-magnitude diagrams (CMDs)
yields distance-metallicity and age-metallicity relations, with
preferred values of m-M=12.65±0.23 mag and age=4.0+1.3-0.7Gyr.
Re-evaluation of the parameters of M67 using Stetson's UBVI photometry
yields [Fe/H]=-0.02±0.05dex, E(B-V)=0.04±0.01mag,
m-M=9.75±0.03mag, and age=3.85±0.17Gyr; we thus find the
metallicity and age of the two clusters to be indistinguishable. A
semi-independent analysis adopting the parameters of M67 and shifting
the fiducials of the two clusters in six CMDs until they match
strongly corroborates the values listed above. The differences between
our inferred parallaxes and the Gaia DR2 values are 87±60µas
for NGC7142 and 48±15µas for M67, consistent with previous
studies.
Description:
UBVRI images of NGC7142 were taken under photometric conditions using
the WIYN 0.9m telescope at the Kitt Peak National Observatory on the
night of 2015-December-5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 220 8702 Photometry for stars in NGC 7142
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See also:
J/AJ/118/2894 : UBVRI CCD photometry in NGC 188 (Sarajedini+, 1999)
J/AJ/122/1486 : NGC 2451A proper motions and membership (Platais+, 2001)
J/AJ/124/601 : Absolute positions & proper motions in NGC 188 (Platais+, 2002)
J/AJ/126/2922 : Astrometry and membership in NGC 188 (Platais+, 2003)
J/A+A/461/509 : Membership and spectroscopy of IC 2391 (Platais+, 2007)
J/AJ/134/1216 : Abundances of NGC 7142, 6939, & IC 4756 stars (Jacobson+, 2007)
J/AJ/135/2264 : Stellar radial velocities in NGC 188 (Geller+, 2008)
J/AJ/137/3743 : Spectroscopic binary orbits in NGC 188 (Geller+, 2009)
J/AJ/138/159 : NGC 6819 stellar radial-velocity and photometry (Hole+, 2009)
J/AJ/139/1383 : Radial velocities in M35 (NGC 2168) (Geller+, 2010)
J/AJ/139/2034 : NGC 6253 stars equivalent widths (Anthony-Twarog+, 2010)
J/AJ/146/43 : WIYN open cluster study. LV. NGC 6819 (Platais+, 2013)
J/AJ/148/38 : WIYN open cluster study. LX. RV of NGC 6819 (Milliman+, 2014)
J/AJ/148/61 : WIYN open cluster study. LIX. RVs NGC 6791 (Tofflemire+, 2014)
J/AJ/148/85 : WIYN open cluster study. LXII. Photometry M35 (Thompson+, 2014)
J/AJ/150/10 : WOCS. LXVI. Radial velocity survey in M35 (Leiner+, 2015)
J/AJ/151/152 : WOCS. LXXI. Spectroscopy 5 stars in NGC 6791 (Milliman+, 2016)
J/AJ/152/192 : WOCS. LXXII. A uvbyCaHb study NGC 2506 (Anthony-Twarog+, 2016)
J/ApJ/824/75 : Abundances in 23 open clusters. I. (Overbeek+, 2016)
J/AJ/153/128 : WOCS. LXXV. Hyades&Praesepe stellar Li data (Cummings+, 2017)
J/AJ/155/138 : WOCS.LXXVI.Velocity & abund. in NGC2506 (Anthony-Twarog+, 2018)
J/AJ/159/220 : WOCS LXXIX. M48. I. WIYN/Hydra spectra M48 stars (Sun+, 2020)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- WOCS [1001/429028] WOCS identifier (1)
8- 15 F8.3 pix Xpos [-74/4099] X coordinate
17- 24 F8.3 pix Ypos [2/4112] Y coordinate
26- 27 I2 h RAh [21] Hour of right ascension (J2000)
29- 30 I2 min RAm [42/47] Minute of right ascension (J2000)
32- 36 F5.2 s RAs Second of right ascension (J2000)
38 A1 --- DE- [+] Sign of declination (J2000)
39- 40 I2 deg DEd [65/66] Degree of declination (J2000)
42- 43 I2 arcmin DEm Arcminute of declination (J2000)
45- 48 F4.1 arcsec DEs Arcsecond of declination (J2000)
50- 55 F6.3 mag Umag [10.6/20.4]? U magnitude (λ∼360nm)
57- 61 F5.3 mag e_Umag [0.002/0.1]? Negative error on Umag
63- 67 F5.3 mag E_Umag [0/0.2]? Positive error on Umag
69- 74 F6.3 mag Bmag [10.6/22]? B magnitude (λ∼450nm)
76- 80 F5.3 mag e_Bmag [0.002/0.1]? Negative error on Bmag
82- 86 F5.3 mag E_Bmag [0/0.3]? Positive error on Bmag
88- 93 F6.3 mag Vmag [10/21.8] V magnitude ({lamba}∼555nm)
95- 99 F5.3 mag e_Vmag [0.002/0.1] Negative error on Vmag
101-105 F5.3 mag E_Vmag [0/0.6] Positive error on Vmag
107-112 F6.3 mag Rmag [9.2/20.7]? R magnitude (λ∼660nm)
114-118 F5.3 mag e_Rmag [0.002/0.1]? Negative error on Rmag
120-124 F5.3 mag E_Rmag [0/0.3]? Positive error on Rmag
126-131 F6.3 mag Imag [8.5/19.9]? I magnitude (λ∼0.87µm)
133-137 F5.3 mag e_Imag [0.002/0.1]? Negative error on Imag
139-143 F5.3 mag E_Imag [0/0.4]? Negative error on Imag
145-146 I2 --- NU [0/10] Number of observation for U band
148-149 I2 --- NB [0/13] Number of observation for B band
151-152 I2 --- NV [1/13] Number of observation for V band
154-155 I2 --- NR [0/13] Number of observation for R band
157-158 I2 --- NI [0/13] Number of observation for I band
160-165 F6.3 mag U-B [-0.15/2.47]? U-B color
167-172 F6.3 mag U-V [-0.09/4.61]? U-V color
174-178 F5.3 mag U-R [0.37/6.02]? U-R color
180-184 F5.3 mag U-I [0.54/7.53]? U-I color
186-190 F5.3 mag B-V [0.06/2.23]? B-V color
192-196 F5.3 mag B-R [0.26/3.97]? B-R color
198-202 F5.3 mag B-I [0.43/5.87]? B-I color
204-208 F5.3 mag V-R [0.07/4.01]? V-R color
210-214 F5.3 mag V-I [0.24/6.84]? V-I color
216-220 F5.3 mag R-I [0.09/2.84]? R-I color
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Note (1): See Deliyannis+, 2020 (in preparation).
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History:
From electronic version of the journal
References:
von Hippel et al Paper I: 1998AJ....116.1789V 1998AJ....116.1789V
Sarajedini et al Paper II: 1999AJ....118.2894S 1999AJ....118.2894S cat. J/AJ/118/2894
Sarajedini et al Paper III: 1999AJ....118.2321S 1999AJ....118.2321S
Barrado et al Paper V: 2001ApJ...549..452B 2001ApJ...549..452B
Sills et al Paper VI: 2000ApJ...544..944S 2000ApJ...544..944S
Platais et al Paper VII: 2001AJ....122.1486P 2001AJ....122.1486P cat. J/AJ/122/1486
Platais et al Paper VIII: 2002AJ....124..601P 2002AJ....124..601P cat. J/AJ/124/601
Grocholski et al Paper X: 2002AJ....123.1603G 2002AJ....123.1603G
von Hippel et al Paper XI: 2002AJ....124.1555V 2002AJ....124.1555V
Kafka et al Paper XV: 2003AJ....126..276K 2003AJ....126..276K
Grocholski et al Paper XVI: 2003MNRAS.345.1015G 2003MNRAS.345.1015G
Platais et al Paper XVII: 2003AJ....126.2922P 2003AJ....126.2922P cat. J/AJ/126/2922
Mathieu et al Paper XVIII: 2004ApJ...602L.121M 2004ApJ...602L.121M
Sarajedini et al Paper XIX: 2004AJ....127..991S 2004AJ....127..991S
Kafka et al Paper XX: 2004AJ....127.1622K 2004AJ....127.1622K
Hole et al Paper XXIV: 2009AJ....138..159H 2009AJ....138..159H cat. J/AJ/138/159
Platais et al Paper XXVI: 2007A&A...461..509P 2007A&A...461..509P cat. J/A+A/461/509
Geller et al Paper XXXII: 2008AJ....135.2264G 2008AJ....135.2264G cat. J/AJ/135/2264
Geller et al Paper XXXVI: 2009AJ....137.3743G 2009AJ....137.3743G cat. J/AJ/137/3743
Geller et al Paper XXXVIII: 2010AJ....139.1383G 2010AJ....139.1383G cat. J/AJ/139/1383
Anthony-Twarog et al Paper XXXIX: 2010AJ....139.2034A 2010AJ....139.2034A cat. J/AJ/139/2034
Geller et al Paper XLVIII: 2012AJ....144...54G 2012AJ....144...54G
Yang et al Paper LII: 2013ApJ...762....3Y 2013ApJ...762....3Y
Platais et al Paper LV: 2013AJ....146...43P 2013AJ....146...43P cat. J/AJ/146/43
Maderak et al Paper LVII: 2013AJ....146..143M 2013AJ....146..143M
Tofflemire et al Paper LIX: 2014AJ....148...61T 2014AJ....148...61T cat. J/AJ/148/61
Milliman et al Paper LX: 2014AJ....148...38M 2014AJ....148...38M cat. J/AJ/148/38
Thompson et al Paper LXII: 2014AJ....148...85T 2014AJ....148...85T cat. J/AJ/148/85
Maderak et al Paper LXIII: 2015AJ....149..141M 2015AJ....149..141M
Leiner et al Paper LXVI: 2015AJ....150...10L 2015AJ....150...10L cat. J/AJ/150/10
Milliman et al Paper LXXI: 2016AJ....151..152M 2016AJ....151..152M cat. J/AJ/151/152
Anthony-Twarog et al Paper LXXII: 2016AJ....152..192A 2016AJ....152..192A cat. J/AJ/152/192
Cummings et al Paper LXXV: 2017AJ....153..128C 2017AJ....153..128C cat. J/AJ/153/128
Anthony-Twarog et al Paper LXXVI: 2018AJ....155..138A 2018AJ....155..138A cat. J/AJ/155/138
Sun et al Paper LXXIX: 2020AJ....159..220S 2020AJ....159..220S cat. J/AJ/159/220
Anthony-Twarog et al Paper LXXXI: 2020AJ....160...75A 2020AJ....160...75A
(End) Prepared by [AAS], Coralie Fix [CDS], 21-Sep-2020