J/AJ/161/160 BINOCS: NEWFIRM & IRAC IR photometry of clusters (Thompson+, 2021)
The Binary INformation from Open Clusters Using SEDs (BINOCS) Project: reliable
photometric mass determinations of binary star systems in clusters.
Thompson B.A., Frinchaboy P.M., Spoo T., Donor J.
<Astron. J., 161, 160 (2021)>
=2021AJ....161..160T 2021AJ....161..160T
ADC_Keywords: Clusters, open; Stars, double and multiple; Photometry, infrared
Keywords: Open star clusters ; Binary stars ; Infrared photometry
Abstract:
We introduce a new binary detection technique, Binary INformation from
Open Clusters using SEDs (binocs), which we show is able to determine
reliable stellar multiplicity and masses over a much larger mass range
than current approaches. This new technique determines accurate
component masses of binary and single systems of the open clusters'
main sequence by comparing observed magnitudes from multiple
photometric filters to synthetic star spectral energy distributions
(SEDs), allowing us to systematically probe the binary population for
low-mass stars in clusters for eight well-studied open clusters. We
provide new deep, infrared photometric catalogs (1.2-8.0 µm) for
the key open clusters NGC 1960 (M36), NGC 2099 (M37), NGC 2420, and
NGC 2682 (M67), using observations from NOAO/NEWFIRM and Spitzer/IRAC.
Using these deep multiwavelength catalogs, the binocs method is
applied to these clusters to determine accurate component masses for
unresolved cluster binaries. We explore binary fractions as a function
of cluster age, Galactic location, and metallicity.
Description:
We obtained JHKS near-IR photometry, using the NEWFIRM instrument on
the Kitt Peak 4m telescope. Images were taken on two nights in 2008
February. Clusters have effective exposure times of 2400s in J and H,
and a total of 3600s in Ks.
Deep mid-IR photometry ([3.6][4.5][5.8][8.0]) for NGC2099 and NGC2682
was gathered using the Infrared Array Camera (IRAC) on the Spitzer
Space Telescope. NGC2682 data were obtained as part of cycle 2
proposal 20710 (PI: Skrutskie), and NGC2099 data were obtained from
cycle 3 proposal 30800 (PI: Frinchaboy).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 29 8 *Adopted cluster parameters for all clusters in the
data set
table5.dat 114 202392 New NEWFIRM and IRAC photometry
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Note on table1.dat: Data from Dias+, 2002, B/ocl.
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See also:
B/ocl : Optically visible open clusters and Candidates (Dias+, 2002-2015)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
II/316 : UKIDSS-DR6 Galactic Plane Survey (Lucas+ 2012)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/A+A/357/471 : BV and proper motions in NGC 1960 & NGC 2194 (Sanner+, 2000)
J/AJ/126/2922 : Astrometry and membership in NGC 188 (Platais+, 2003)
J/PASP/116/1012 : A star catalog for the open cluster NGC 188 (Stetson+, 2004)
J/AJ/129/656 : Infrared photometry of NGC 6791 (Carney+, 2005)
J/AJ/132/1669 : Wide-field CCD phot. around nine open clusters (Sharma+,2006)
J/AJ/135/2264 : Stellar radial velocities in NGC 188 (Geller+, 2008)
J/ApJ/675/1233 : gri photometry in M37 (NGC 2099) (Hartman+, 2008)
J/A+A/484/609 : BVI photometry and proper motions in M67 (Yadav+, 2008)
J/ApJ/700/523 : Galactic star clusters in SDSS. II. Colors. (An+, 2009)
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/148/38 : WIYN open cluster study.LX RV survey NGC6819 (Milliman+,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/156/142 : Precision cluster abund. APOGEE using SDSS DR14 (Donor+,2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- NGC [188/6791] Cluster NGC designation
6- 8 A3 --- OName Other name
10- 13 F4.2 Gyr Age [0.03/8] Cluster age
15- 19 F5.2 [-] [Fe/H] [-0.23/0.38]? Metallicity
21- 24 I4 pc Dist [860/5080] Distance
26- 29 F4.2 --- E(B-V) [0.03/0.36] B-V color excess
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- NGC [188/2682] Cluster NGC desgination
6- 14 F9.5 deg RAdeg [0/360] Right Ascension in decimal degrees (J2000)
16- 23 F8.5 deg DEdeg [11.1/86.3] Declination in decimal degrees (J2000)
25- 30 F6.3 mag Jmag [5.26/19.3]?=99.999 Apparent J band magnitude
32- 36 F5.3 mag e_Jmag [0.005/0.1]?=9.999 Uncertainty in Jmag
38- 43 F6.3 mag Hmag [4.62/19.3]?=99.999 Apparent H band magnitude
45- 49 F5.3 mag e_Hmag [0.004/0.1]?=9.999 Uncertainty in Hmag
51- 56 F6.3 mag Ksmag [4.19/18.3]?=99.999 Apparent Ks (short) band
magnitude
58- 62 F5.3 mag e_Ksmag [0.006/0.1]?=9.999 Uncertainty in Ksmag
64- 69 F6.3 mag I1mag [3.84/18.7]?=99.999 Spitzer/IRAC 3.6micron band
magnitude
71- 75 F5.3 mag e_I1mag [0.01/0.1]?=9.999 Uncertainty in I1mag
77- 82 F6.3 mag I2mag [2.56/17.6]?=99.999 Spitzer/IRAC 4.5micron band
magnitude
84- 88 F5.3 mag e_I2mag [0.01/0.1]?=9.999 Uncertainty in I2mag
90- 95 F6.3 mag I3mag [4.7/15.4]?=99.999 Spitzer/IRAC 5.8micron band
magnitude
97-101 F5.3 mag e_I3mag [0.009/0.1]?=9.999 Uncertainty in I3mag
103-108 F6.3 mag I4mag [4.66/14.8]?=99.999 Spitzer/IRAC 8.0micron band
magnitude
110-114 F5.3 mag e_I4mag [0.008/0.1]?=9.999 Uncertainty in I4mag
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 22-Jun-2021