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J/A+A/615/A12      24 nearby open clusters TGAS and HSOY reanalysis (Yen+, 2018)

Reanalysis of nearby open clusters using Gaia DR1/TGAS and HSOY. Yen S.X., Reffert S., Schilbach E., Roeser S., Kharchenko N.V., Piskunov A.E. <Astron. Astrophys. 615, A12 (2018)> =2018A&A...615A..12Y (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Clusters, open ; Positional data ; Photometry ; Proper motions ; Parallaxes, trigonometric Keywords: open clusters and associations: general - galaxies: star clusters: general - Galaxy: fundamental parameters Abstract: We have determined stellar membership based on astrometry, primarily from TGAS and HSOY, and multi-band photometry for 24 clusters within 333 pc. The fundamental cluster parameters (distance, age, and reddening) have been derived by fitting Padova isochrones (Bressan et al. 2012) to the cluster photometry using a chi-squared minimization. Description: For the 24 clusters we studied, we provide a table of the derived cluster parameters (Table 1 in our paper), as well as membership lists for each cluster (Tables C1-C24). The 24 clusters are: Blanco 1 (Table C1), Platais 2 (Table C2), alpha Per (Table C3), Alessi 13 (Table C4), the Pleiades (Table C5), Platais 3 (Table C6), Platais 4 (Table C7), Collinder 65 (Table C8), NGC 2232 (Table C9), Alessi 3 (Table C10), NGC 2451A (Table C11), Praesepe (Table C12), IC 2391 (Table C13), Platais 8 (Table C14), Platais 9 (Table C15), IC 2602 (Table C16), Coma Ber (Table C17), Platais 10 (Table C18), Alessi 9 (Table C19), Collinder 350 (Table C20), NGC 6475 (Table C21), Ruprecht 147 (Table C22), NGC 7092 (Table C23), and ASCC 123 (Table C24). The cluster membership lists contain various stellar data. For each star, the StarID, positions (RAdeg and DEdeg), proper motions (pmRA and pmDE), and parallax comes from Gaia DR1/TGAS (Gaia Collaboration et al. 2016, Cat. I/337), HSOY (Altmann et al. 2017, Cat. I/339), Hipparcos (van Leeuwen 2007, Cat. I/311), or a combination of the catalogs. The integer in the Flag column indicates which catalog the respective data are from. Masses derived from fitting the Padova isochrones are also provided for each star. BV photometry is taken from ASCC-2.5 (Kharchenko et al. 2009, Cat. I/280B). JHKs photometry is from 2MASS (Cutri et al. 2013, Cat. II/246). G photometry is from Gaia DR1 (Gaia Collaboration et al. 2016, Cat. I/337). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 150 24 List of derived parameters for 24 clusters files/* 181 24 Membership lists for 24 clusters
See also: I/280 : All-Sky Compiled Catalogue of 2.5 million stars (Kharchenko+ 2009) I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007) I/337 : Gaia DR1 (Gaia Collaboration, 2016) I/339 : Hot Stuff for One Year (HSOY) (Altmann+, 2017) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
2- 14 A13 --- Name NGC, IC, or other common designation 17- 20 I4 --- MWSC MWSC sequential number 23- 24 I2 h RAh Right ascension (ICRS) 27- 28 I2 min RAm Right ascension (ICRS) 31- 35 F5.2 s RAs Right ascension (ICRS) 38 A1 --- DE- Declination sign (ICRS) 39- 40 I2 deg DEd Declination (ICRS) 43- 44 I2 arcmin DEm Declination (ICRS) 47- 51 F5.2 arcsec DEs Declination (ICRS) 54- 59 F6.2 mas/yr pmRA Mean TGAS proper motion in RA*cos(DE) 62- 65 F4.2 mas/yr e_pmRA Formal error of mean TGAS proper motion in RA*cos(DE) 68- 73 F6.2 mas/yr pmDE Mean TGAS proper motion in DE 76- 79 F4.2 mas/yr e_pmDE Formal error of mean TGAS proper motion in DE 82- 86 F5.2 mas plx Mean TGAS parallax 89- 92 F4.2 mas e_plx Mean TGAS parallax error 95- 98 F4.2 [yr] logt Logarithm of age 101-104 F4.2 [yr] E_logt Upper error on logt 107-110 F4.2 [yr] e_logt Lower error on logt 113-117 F5.3 mag E(B-V) Color-excess in (B-V) 120-124 F5.3 mag e_E(B-V) Error of color-excess 127-131 F5.1 pc d Distance from Sun 134-136 F3.1 pc e_d Error of distance 139-140 I2 --- Nt Number of TGAS stars 143-146 I4 --- Nh Number of HSOY stars 149-150 I2 --- Nhip Number of Hipparcos stars
Byte-by-byte Description of file: files/*
Bytes Format Units Label Explanations
2- 20 I19 --- StarID Gaia DR1 Source ID or Hipparcos identifier 23- 34 F12.8 deg RAdeg Right ascension (ICRS) 37- 48 F12.8 deg DEdeg Declination (ICRS) 51- 56 F6.2 mas/yr pmRA Proper motion in RA*cos(DE) 59- 62 F4.2 mas/yr e_pmRA Standard error of proper motion in RA*cos(DE) 65- 70 F6.2 mas/yr pmDE Proper motion in DE 73- 76 F4.2 mas/yr e_pmDE Standard error of proper motion in DE 79- 83 F5.2 mas plx ? Stellar parallax from TGAS or Hipparcos 86- 89 F4.2 mas e_plx ? Standard error of parallax 92- 95 F4.2 Msun Mass Stellar mass 98-103 F6.3 mag Bmag ? B magnitude in Johnson system 106-110 F5.3 mag e_Bmag ? Error of B magnitude 113-118 F6.3 mag Vmag ? V magnitude in Johnson system 121-125 F5.3 mag e_Vmag ? Error of V magnitude 128-133 F6.3 mag Jmag ? 2MASS J magnitude 136-140 F5.3 mag e_Jmag ? Error of J magnitude 143-148 F6.3 mag Hmag ? 2MASS H magnitude 151-155 F5.3 mag e_Hmag ? Error of H magnitude 158-163 F6.3 mag Ksmag ? 2MASS Ks magnitude 166-170 F5.3 mag e_Ksmag ? Error of Ks magnitude 173-178 F6.3 mag Gmag ? Gaia G-band mean magnitude 181 I1 --- Flag Flag for catalog (1)
Note (1): The flag is a number 1, 2, or 3, denoting which catalog the StarID, positions, proper motions, and parallax the data is taken from, as follows: 1 = Gaia DR1 StarID, positions, and proper motions, and TGAS parallax (positions in ICRS, epoch 2015.0) 2 = Gaia DR1 StarID and positions, HSOY proper motions, and no parallax (positions in ICRS, epoch 2015.0) 3 = Hipparcos StarID, positions, proper motions, and parallax (positions in ICRS, epoch 1991.25)
Acknowledgements: Steffi Xiang-Ting Yen, syen(at)
(End) Patricia Vannier [CDS] 07-Mar-2018
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