J/MNRAS/347/101 Precision colour-magnitude diagram of M67 (Sandquist, 2004) ================================================================================ A high relative precision colour-magnitude diagram of M67. Sandquist E.L. =2004MNRAS.347..101S (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Clusters, open; Photometry, UBVRI Keywords: convection - stars: distances - stars: evolution - stars: fundamental parameters - open clusters and associations: individual: NGC 2682 Abstract: We have calibrated and combined an extensive set of BVI observations of M67 to produce a colour-magnitude diagram of stars measured with high relative precision. We have selected stars that are most likely to be single-star members of the cluster using proper motion, radial velocity, and variability information from the literature, and an examination of the most probable colour-magnitude diagram locations of unresolved stellar blends. We have made detailed comparisons of our photometry of the selected stars with theoretical models, and discuss the most notable discrepancies. Observations of M67 turn-off stars are a severe test of algorithms attempting to describe convective cores in the limit of small extent, and we find strong evidence of a 'hook' just fainter than the turn-off gap. The stars in M67 support assertions that the degree of convective core overshooting decreases to zero for stars with masses in the range 1.0<(M/M_{sun}_)<=1.5, but that the degree of overshoot is smaller than currently used in published isochrones. We also verify that all current theoretical models for the lower main sequence (with the exception of Baraffe et al., 1998, Cat. J/A+A/337/403) are too blue for MV>~6, even when the sequences are shifted to match M67 near the MV of the Sun, probably due to a combination of problems with colour-Teff transformations and realistic surface boundary conditions for models. Finally, we identify a subset of cluster members with unusual photometry (candidate red giant binaries, blue straggler stars, and triple systems) deserving of further study. Description: This table contains calibrated BVIc photometry for all stars measured in M67 by Sandquist (2004MNRAS.347..101S), including those identified as single-star candidates in Table 4. The photometry has been cro File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table4.dat 178 553 BVIc Photometry for M67 stars -------------------------------------------------------------------------------- See also: I/300 : PM2000 Bordeaux Proper Motion catalogue (Ducourant+, 2006) J/AJ/106/181 : CCD photometry of open cluster M67 (Montgomery+ 1993) J/A+AS/100/243 : Proper motions in M 67 (Zhao+ 1993) J/AJ/112/628 : BATC Color Survey of M67 (Fan+ 1996) J/AN/325/740 : Astrophysical supplements to ASCC-2.5 (Kharchenko+, 2004) J/A+A/484/609 : BVI photometry and proper motions in M67 (Yadav+, 2008) J/A+A/516/A3 : Proper motions of PM2000 open clusters (Krone-Martins+ 2010) J/AJ/150/97 : Radial velocities in M67. I. 1278 candidate members (Geller+, 2015) J/MNRAS/455/2337 : M67 variable stars photometry (Nardiello+, 2016) Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 I6 --- FanID Identification number in Fan et al, 1996AJ....112..628F, Cat. J/AJ/112/628, Cl* NGC 2682 FBC NNNN in Simbad) 7- 15 F9.3 pix Xpos X pixel position 16- 24 F9.3 pix Ypos Y pixel position 25- 33 F9.4 mag Bmag ?=0 Calibrated B Magnitude 34- 42 F9.4 mag e_Bmag ?=0 Uncertainty in B Magnitude 43- 51 F9.4 mag Vmag ?=0 Calibrated V Magnitude 52- 60 F9.4 mag e_Vmag ?=0 Uncertainty in V Magnitude 61- 69 F9.4 mag Imag ?=0 Calibrated I Magnitude 70- 78 F9.4 mag e_Imag ?=0 Uncertainty in I Magnitude 79- 81 I3 --- PM-S ?=-1 Membership Probability from Sanders, 1977A&AS...27...89S 82- 84 I3 --- PM-G ?=-1 Membership Probability from Girard et al., 1989AJ.....98..227G 85- 87 I3 --- PM-Z ?=-1 Membership Probability from Zhao et al., 1993A&AS..100..243Z, Cat. J/A+AS/100/243 88- 91 I4 --- PM-Y ?=-1 Membership Probability from Yadav et al., 2008A&A...484..609Y, Cat. J/A+A/484/609 92- 96 F5.1 --- PM-KM ?=-1 Membership Probability from Krone-Martins et al., 2010A&A...516A...3K, Cat. J/A+A/516/A3 al., 2004AN....325..740K, Cat. J/AN/325/740 97-101 F5.1 --- PM-N ?=-1 Membership Probability from Nardiello et al., 2016MNRAS.455.2337N, J/MNRAS/455/2337 102-104 I3 --- RV ?=-1 Membership Probability from Geller et al., 2015AJ....150...97G, Cat. J/AJ/150/97 105-111 A7 --- Class Binarity/Membership Classification from Geller et al., 2015AJ....150...97G, Cat. J/AJ/150/97 112-117 I6 --- SandID ?=0 Identification in Sanders, 1977A&AS...27...89S, Cl* NGC 2682 Sand NNNNa in Simbad 118-123 I6 --- ZID ?=0 Identification in Zhao et al., 1993A&AS..100..243Z, Cat. J/A+AS/100/243, CL* NGC 2682 ZTP NNNN in Simbad 124-129 I6 --- MMJID ?=0 Identification in Montgomery et al., 1993AJ....106..181M, Cat. J/AJ/106/181, CL* NGC 2682 MMJ NNNN and CL* NGC 2682 MMJS NN in Simbad 130-135 I6 --- WOCS ?=0 Identification in Geller et al., 2015AJ....150...97G, Cat. J/AJ/150/97, [GLM2015] WOCS NNNNN in Simbad) 136-141 I6 --- YadID ?=0 Identification in Yadav et al., 2008A&A...484..609Y, Cat. J/A+A/484/609, Cl* NGC 2682 YBP NNNN in Simbad) 142-148 I7 --- PM2000 ?=0 Identification in Krone-Martins et al., 2010A&A...516A...3K, Cat. J/A+A/516/A3 149-154 I6 --- NardID ?=0 Identification in Nardiello et al., 2016MNRAS.455.2337N, Cat. J/MNRAS/455/2337 155-166 F12.6 deg RAdeg ?=0 Right Ascension J2000, Epoch 2000.0 167-178 F12.6 deg DEdeg ?=0 Declination J2000, Epoch 2000.0 -------------------------------------------------------------------------------- Acknowledgements: Eric L. Sandquist, esandquist(at)mail.sdsu.edu ================================================================================ (End) Eric Sandquist [San Diego State Univ.], Patricia Vannier [CDS] 22-Aug-2018