J/MNRAS/347/101 Precision colour-magnitude diagram of M67 (Sandquist, 2004)
A high relative precision colour-magnitude diagram of M67.
Sandquist E.L.
<Mon. Not. R. Astron. Soc., 347, 101-118 (2004)>
=2004MNRAS.347..101S 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☉)≤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 2004MNRAS.347..101S), including those identified
as single-star candidates in Table 4. The photometry has been cro
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 178 553 BVIc Photometry for M67 stars
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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
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Bytes Format Units Label Explanations
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1- 6 I6 --- FanID Identification number in Fan et al,
1996AJ....112..628F 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 1977A&AS...27...89S
82- 84 I3 --- PM-G ?=-1 Membership Probability from Girard et al.,
1989AJ.....98..227G 1989AJ.....98..227G
85- 87 I3 --- PM-Z ?=-1 Membership Probability from Zhao et al.,
1993A&AS..100..243Z 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 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 2010A&A...516A...3K, Cat. J/A+A/516/A3
al., 2004AN....325..740K 2004AN....325..740K, Cat. J/AN/325/740
97-101 F5.1 --- PM-N ?=-1 Membership Probability from Nardiello et
al., 2016MNRAS.455.2337N 2016MNRAS.455.2337N, J/MNRAS/455/2337
102-104 I3 --- RV ?=-1 Membership Probability from Geller et al.,
2015AJ....150...97G 2015AJ....150...97G, Cat. J/AJ/150/97
105-111 A7 --- Class Binarity/Membership Classification from Geller
et al., 2015AJ....150...97G 2015AJ....150...97G, Cat. J/AJ/150/97
112-117 I6 --- SandID ?=0 Identification in Sanders,
1977A&AS...27...89S 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 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 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 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 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 2010A&A...516A...3K, Cat. J/A+A/516/A3
149-154 I6 --- NardID ?=0 Identification in Nardiello et al.,
2016MNRAS.455.2337N 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
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Acknowledgements:
Eric L. Sandquist, esandquist(at)mail.sdsu.edu
(End) Eric Sandquist [San Diego State Univ.], Patricia Vannier [CDS] 22-Aug-2018