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Home All issues Volume 498 / No 1 (April IV 2009) A&A, 498 1 (2009) 109-114 Full HTML
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Table 1:

Summary of RSG candidates and their properties. Top panel: the core group of 15 photometrically selected stars regarded as prime cluster candidates; second panel: likely cluster members; third panel: stars of interest, as defined in Sect. 2 and fourth panel: likely foreground RSG identified by spectroscopy and included for completeness. Note that based on spectroscopy, we also consider it likely that star S16 is a cluster member and treat it as such in the text. Co-ordinates and near-IR magnitudes are from 2MASS, with mid-IR ($\sim $5-25 $\mu $m) magnitudes from the Galactic plane surveys of GLIMPSE/ Spitzer (Benjamin et al. 2003) and the Midcourse Source Experiment (MSX) (Egan et al. 2001). We also provide the dereddened MSX (A-C) colour (adopting the prescription of Messineo et al. 2005), which is a diagnostic of emission from circumstellar dust (and hence proxy for mass loss) and the spectral type of the stars, where available (Sect. 3).
ID Co-ordinates (J2000)   2MASS   GLIMPSE Spitzer     MSX     Spec.
  RA Decln. J H $K_{\rm s}$ 5.8 $\mu $m 8.0 $\mu $m A C D E (A-C) type
S1 18 45 23.60 -03 24 13.9 8.55 6.54 5.58 4.73 4.50 - - - - - RSG
S2 18 45 26.54 -03 23 35.3 8.53 6.62 5.75 4.92 4.63 4.30 3.39 - - - M3 Ia
S3 18 45 24.34 -03 22 42.1 8.54 6.43 5.35 4.19 4.14 - - - - - M4 Ia
S4 18 45 25.31 -03 23 01.1 8.42 6.39 5.31 4.08 4.04 3.97 3.12 3.21 - 0.85 M3 Ia
S5 18 45 23.26 -03 23 44.1 8.51 6.52 5.52 4.45 4.20 3.78 2.82 3.15 - 0.96 M2 Ia
S6 18 45 19.39 -03 24 48.3 9.06 6.97 6.04 5.24 5.20 4.71 - - - - RSG
S7 18 45 24.18 -03 23 47.3 9.12 7.10 6.20 5.22 4.84 - - - - - M0 Ia
S8 18 45 20.06 -03 22 47.1 9.53 7.29 6.30 5.46 5.43 5.60 - - - - K5 Ia
S9 18 45 28.13 -03 22 54.6 9.34 7.26 6.29 5.49 5.44 - - - - - M0 Ia
S10 18 45 16.56 -03 23 45.1 9.65 7.43 6.43 5.57 5.52 5.45 - - - - M0 Ia
S11 18 45 26.31 -03 20 03.3 9.18 7.27 6.46 5.77 5.78 5.87 - - - - RSG
S12 18 45 29.12 -03 28 35.6 9.78 7.86 6.93 6.57 6.26 6.23 - - - - -
S13 18 45 05.51 -03 20 19.6 8.18 5.97 4.96 - - 3.59 2.43 2.45 - 1.16 RSG
S14 18 45 29.02 -03 22 37.4 9.51 7.08 5.89 4.79 4.61 4.43 - - - - RSG
S15 18 45 16.84 -03 21 14.6 9.33 6.92 5.69 4.12 - 3.26 1.85 1.66 0.92 1.41 RSG
S16 18 45 20.87 -03 27 59.6 9.32 6.78 5.53 4.34 4.15 3.79 2.93 2.97 2.22 0.86 RSG
S17 18 45 38.45 -03 23 18.1 10.58 7.07 5.27 - - 2.09 0.65 0.45 -0.121 1.44 -
S18 18 45 38.65 -03 21 03.9 10.07 7.62 6.47 5.50 5.44 5.36 - - - - -
S19 18 45 37.05 -03 19 35.1 10.43 7.81 6.52 5.44 5.40 5.42 - - - - -
S20 18 45 16.64 -03 22 33.2 10.71 8.28 7.06 5.98 5.85 5.79 - - - - -
S21 18 45 11.81 -03 18 43.1 12.27 8.30 6.30 4.50 4.32 4.27 3.31 3.17 - 0.96 -
S22 18 45 12.69 -03 23 30.7 10.51 8.04 6.78 5.49 5.41 5.36 - - - - -
S23 18 45 48.82 -03 24 23.1 9.67 7.36 5.85 - - 2.92 2.00 1.84 1.27 0.92 -
S24 18 45 50.34 -03 24 21.8 10.84 8.08 6.74 - - - - - - - -
S25 18 45 45.61 -03 20 42.8 11.27 8.43 7.10 5.88 5.96 - - - - - -
S26 18 45 35.02 -03 19 58.2 11.43 8.43 6.96 5.42 5.21 - - - - - -
S27 18 45 26.61 -03 23 24.7 11.26 8.78 7.46 6.01 5.81 - - - - - -
S28 18 45 17.75 -03 26 38.4 7.78 6.14 5.38 4.42 4.17 3.18 3.12 - - 1.19 RSG

Source LaTeX | All tables | In the text

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