2011MNRAS.416L...6M

Query : 2011MNRAS.416L...6M

2011MNRAS.416L...6M - Mon. Not. R. Astron. Soc., 416, L6-L10 (2011/September-1)

Empirical determination of the integrated red giant and horizontal branch stellar mass-loss in ω Centauri.

McDONALD I., JOHNSON C.I. and ZIJLSTRA A.A.

Abstract (from CDS):

We herein determine the average integrated mass-loss from stars belonging to the dominant metal-poor population ([Fe/H] ∼ -1.7) of the Galactic globular cluster ω Centauri (NGC 5139) during their red giant and horizontal branch (HB) evolution. Masses are empirically calculated from spectroscopic measurements of surface gravity and photometric measurements of temperature and luminosity. Systematic uncertainties prevent an absolute measurement of masses at a phase of evolution. However, the relative masses of early asymptotic giant branch (AGB) stars and central red giant branch (RGB) stars can be measured, and used to derive the mass-loss between these two phases. This can then be used as a physical check of models of HB stars. For ω Centauri, the average difference is found to be 26±4 per cent. Assuming initial and final masses of 0.83 and 0.53 M☉, we determine that 0.21 ±0.03 M☉ is lost on the RGB and 0.09 ± ∼ 0.05 M☉is lost on the AGB. The implied HB stellar mass of 0.62±0.04 M☉ is commensurate with literature determinations of the masses of the cluster's HB stars. The accuracy of this measurement can be improved through better selection of stars and spectral coverage, and applied to other clusters where HB models do not currently agree.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): stars: AGB and post-AGB - circumstellar matter - stars: mass-loss - stars: winds, outflows - globular clusters: individual: ω Cen - infrared: stars

VizieR on-line data: <Available at CDS (J/MNRAS/416/L6): table1.dat>

Simbad objects: 91

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Number of rows : 91
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 2MASS J13251733-4741357 AB* 13 25 17.3306138976 -47 41 35.698524288   14.300 13.434     ~ 19 0
2 2MASS J13252665-4736205 AB* 13 25 26.6493692352 -47 36 20.536569936 14.39 14.14 13.14     ~ 19 0
3 NGC 5139 6259 RG* 13 25 47.4382363896 -47 18 43.507795572 15.18 14.55 13.46     ~ 12 0
4 NGC 5139 3911 RG* 13 25 48.6390802104 -47 29 03.564434184 14.68 14.150 13.135   11.971 ~ 13 0
5 NGC 5139 5588 RG* 13 25 49.3491381264 -47 22 53.817583512 15.04 14.260 13.227     ~ 13 0
6 2MASS J13254966-4737362 AB* 13 25 49.660 -47 37 36.26   14.210 13.271     ~ 11 0
7 NGC 5139 3109 RG* 13 25 51.6599185680 -47 32 08.615213232   14.368 13.400     ~ 8 0
8 NGC 5139 5969 RG* 13 25 57.3077341776 -47 20 08.574411192 14.86 14.110 13.011     ~ 17 0
9 NGC 5139 5056 RG* 13 25 58.1255913816 -47 24 15.361675452   14.278 13.260   12.095 ~ 10 0
10 2MASS J13260009-4725379 AB* 13 26 00.0960676560 -47 25 37.891741296   13.872 12.871     ~ 10 0
11 NGC 5139 5367 RG* 13 26 01.2568127544 -47 23 55.589105868 14.68 14.080 13.055     ~ 11 0
12 NGC 5139 585 RG* 13 26 01.6326444000 -47 27 37.833363036   14.105 13.012     ~ 9 0
13 NGC 5139 604 RG* 13 26 01.8779989824 -47 26 52.582843284   14.141 13.139     ~ 8 0
14 Cl* NGC 5139 SAW V1 WV* 13 26 05.1727903488 -47 23 42.535739148 11.483 12.017 11.432 11.014 10.165 ~ 61 0
15 NGC 5139 5788 RG* 13 26 08.8868215104 -47 21 15.590924208 14.74 14.170 13.099   11.885 ~ 13 0
16 2MASS J13261091-4732460 AB* 13 26 10.9208782872 -47 32 46.061155536   14.270 13.326     ~ 8 0
17 2MASS J13261218-4726577 AB* 13 26 12.1864000560 -47 26 57.632757216   14.011 13.056     ~ 8 0
18 2MASS J13261324-4717578 AB* 13 26 13.2466671672 -47 17 57.844470768 14.30 14.03 13.16     ~ 14 0
19 NGC 5139 599 RG* 13 26 17.7555835512 -47 33 14.591433456   14.057 12.981     ~ 10 0
20 2MASS J13261782-4724561 AB* 13 26 17.8268635032 -47 24 56.169798912   13.918 12.976     ~ 7 0
21 NGC 5139 545 RG* 13 26 18.3091663104 -47 22 28.318701756   14.053 12.911   11.679 ~ 12 0
22 NGC 5139 558 RG* 13 26 19.3100044320 -47 19 57.010781568 14.64 14.1 12.97     ~ 18 0
23 2MASS J13261964-4726389 AB* 13 26 19.6471942560 -47 26 38.938095960   14.240 13.299     ~ 6 0
24 NGC 5139 422 RG* 13 26 19.8429001224 -47 33 31.652704836   13.804 12.678     ~ 11 0
25 2MASS J13262072-4725387 RG* 13 26 20.7217445856 -47 25 38.771925384   14.280 13.264     ~ 6 0
26 NGC 5139 479 RG* 13 26 21.4433554800 -47 31 28.940238948 14.53 13.930 12.823     ~ 13 0
27 2MASS J13262243-4720261 AB* 13 26 22.4362572576 -47 20 26.085872184   14.081 13.129     ~ 10 0
28 NGC 5139 4763 RG* 13 26 25.3290384840 -47 25 36.968434608   14.336 13.308     ~ 10 0
29 2MASS J13262583-4722385 AB* 13 26 25.8325263216 -47 22 38.570802780   14.195 13.213     ~ 7 0
30 HD 116745 pA* 13 26 26.3183998296 -47 16 27.350366448   11.08 10.79     A7/9 75 0
31 2MASS J13262676-4728514 RG* 13 26 26.7642800256 -47 28 51.438214488   14.021 12.855     ~ 5 0
32 NGC 5139 6460 RG* 13 26 26.9746550376 -47 16 46.063124364 14.78 14.37 13.28     ~ 13 0
33 2MASS J13262760-4728412 RG* 13 26 27.6096477144 -47 28 41.270884968   14.057 13.033     ~ 3 0
34 2MASS J13262914-4727252 RG* 13 26 29.1595729272 -47 27 25.139669256   14.119 13.081     ~ 5 0
35 2MASS J13263002-4729536 RG* 13 26 30.0318416112 -47 29 53.713833072   14.145 13.081     ~ 3 0
36 NGC 5139 443 RG* 13 26 30.1347726432 -47 26 10.361722632   14.077 12.988     ~ 11 0
37 2MASS J13263076-4728361 RG* 13 26 30.7765541280 -47 28 36.157112472   14.207 13.208     ~ 2 0
38 NGC 5139 436 RG* 13 26 30.8205584616 -47 24 51.999657660   13.942 12.774   11.548 ~ 15 0
39 2MASS J13263102-4724052 AB* 13 26 31.0237955712 -47 24 05.239820664   14.215 13.268     ~ 8 0
40 NGC 5139 5108 RG* 13 26 31.3855256400 -47 24 19.041386868   14.253 13.197   12.032 ~ 12 0
41 2MASS J13263276-4728453 AB* 13 26 32.7727768080 -47 28 45.411219696   13.615 12.565     ~ 4 0
42 2MASS J13263640-4727178 RG* 13 26 36.4140031560 -47 27 17.733333600   13.886 12.878     ~ 4 0
43 2MASS J13263647-4728155 RG* 13 26 36.480 -47 28 15.55   14.311 13.153   12.100 ~ 4 0
44 2MASS J13263648-4730414 RG* 13 26 36.4854928248 -47 30 41.381953740   14.140 13.074   11.961 ~ 3 0
45 2MASS J13263925-4735179 RG* 13 26 39.2573332920 -47 35 18.024512928 14.84 14.290 13.226   12.183 ~ 11 0
46 2MASS J13264148-4726196 RG* 13 26 41.4954703104 -47 26 19.720227408   13.972 12.794   11.628 ~ 5 0
47 NGC 5139 605 RG* 13 26 42.6245937864 -47 17 10.853175444   14.25 12.99     ~ 13 0
48 2MASS J13264421-4733572 RG* 13 26 44.2145318472 -47 33 57.350464992   13.892 12.768     ~ 11 0
49 2MASS J13264434-4736459 AB* 13 26 44.3556665376 -47 36 46.003501584   14.038 13.003     ~ 9 0
50 2MASS J13264618-4731408 RG* 13 26 46.1955832296 -47 31 40.777881132   13.949 12.817   11.648 ~ 5 0
51 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
52 2MASS J13264905-4723185 AB* 13 26 49.0583906664 -47 23 18.571354080   14.113 13.160     ~ 8 0
53 2MASS J13264907-4732279 AB* 13 26 49.0864159608 -47 32 27.956625000   14.097 13.089     ~ 8 0
54 NGC 5139 502 RG* 13 26 51.8945306088 -47 23 46.940232156   14.042 12.940   11.693 ~ 12 0
55 NGC 5139 6316 RG* 13 26 53.0606944536 -47 18 32.162834880 15.11 14.320 13.148     ~ 15 0
56 2MASS J13265328-4726341 RG* 13 26 53.2901434944 -47 26 34.187381988   14.107 13.007     ~ 6 0
57 2MASS J13265344-4721143 AB* 13 26 53.4540381912 -47 21 14.452032708   13.891 12.893     ~ 8 0
58 2MASS J13265462-4733001 AB* 13 26 54.6365825928 -47 33 00.173799324   14.238 13.278     ~ 5 0
59 2MASS J13265559-4735056 RG* 13 26 55.6061608344 -47 35 05.724477924   14.264 13.152   12.112 ~ 7 0
60 2MASS J13265584-4726497 RG* 13 26 55.844 -47 26 49.72   13.991 12.863     ~ 3 0
61 2MASS J13265588-4735187 RG* 13 26 55.8901119120 -47 35 18.867216840   14.194 13.035   11.992 ~ 7 0
62 2MASS J13265592-4741119 RG* 13 26 55.9268981280 -47 41 12.074012268   14.43 13.40   12.188 ~ 13 0
63 2MASS J13265770-4716498 RG* 13 26 57.6977442552 -47 16 49.941640380 14.83 14.53 13.55     ~ 11 0
64 2MASS J13265774-4725201 RG* 13 26 57.7493421144 -47 25 20.185526280   13.980 12.862   11.659 ~ 7 0
65 2MASS J13270015-4728222 RG* 13 27 00.1648235136 -47 28 22.275608988   13.812 12.686     ~ 2 0
66 2MASS J13270079-4727550 RG* 13 27 00.8032195008 -47 27 55.128374028   13.913 12.799     ~ 6 0
67 NGC 5139 566 RG* 13 27 01.0145191104 -47 21 41.572824804   14.10 13.00     ~ 11 0
68 NGC 5139 1957 RG* 13 27 02.5709205912 -47 38 18.664934532   14.496 13.469     ~ 8 0
69 2MASS J13270283-4734513 RG* 13 27 02.8418599464 -47 34 51.384111420   14.036 12.860   11.754 ~ 9 0
70 2MASS J13270719-4728457 RG* 13 27 07.2047087616 -47 28 45.756998544   14.173 13.133   11.963 ~ 5 0
71 2MASS J13270838-4734525 RG* 13 27 08.3971870320 -47 34 52.634586756   13.881 12.729     ~ 6 0
72 2MASS J13270939-4732522 RG* 13 27 09.4037793048 -47 32 52.107393948   13.902 12.733     ~ 9 0
73 2MASS J13270952-4733560 AB* 13 27 09.5357690976 -47 33 56.028041244   14.023 13.000     ~ 6 0
74 2MASS J13270982-4734394 RG* 13 27 09.8330017488 -47 34 39.360432756   13.974 12.890     ~ 8 0
75 NGC 5139 1754 RG* 13 27 09.8595242112 -47 39 44.334642060   14.330 13.317     ~ 13 0
76 2MASS J13271081-4723188 AB* 13 27 10.8200576544 -47 23 18.762553176   14.233 13.311     ~ 6 0
77 NGC 5139 497 RG* 13 27 11.5742289840 -47 22 00.893099748 14.75 14.08 12.96     ~ 14 0
78 NGC 5139 6207 RG* 13 27 16.9937248128 -47 19 28.297909632 14.85 14.410 13.421     ~ 13 0
79 NGC 5139 6342 RG* 13 27 18.7253767464 -47 18 46.056681360   14.286 13.263     ~ 12 0
80 Cl* NGC 5139 SAW V212 EB* 13 27 21.7178932634 -47 23 33.019414819 17.654 17.884 17.262 16.778 16.370 ~ 40 0
81 2MASS J13273014-4724350 AB* 13 27 30.1501118688 -47 24 35.086114044 14.53 14.160 13.209     ~ 11 0
82 NGC 5139 541 RG* 13 27 30.3011836008 -47 34 14.139834852   14.09 12.89   11.677 ~ 13 0
83 NGC 5139 4339 RG* 13 27 32.9060622048 -47 27 59.902664508   14.390 13.328   12.082 ~ 10 0
84 NGC 5139 5707 RG* 13 27 33.6668739336 -47 22 44.205371400 15.07 14.380 13.320   12.031 ~ 12 0
85 NGC 5139 6355 RG* 13 27 36.1273072752 -47 18 19.892548152 14.84 14.36 13.32     ~ 15 0
86 NGC 5139 4937 RG* 13 27 36.1372576152 -47 25 09.496593480   14.169 13.165   12.005 ~ 9 0
87 2MASS J13273669-4730514 RG* 13 27 36.7084374744 -47 30 51.417434304   14.082 13.052   11.876 ~ 9 0
88 NGC 5139 5268 RG* 13 27 38.2659836376 -47 24 24.830768340   14.53 13.49   12.296 ~ 10 0
89 NGC 5139 4961 RG* 13 27 44.3246543472 -47 25 07.117193820   14.371 13.330   12.109 ~ 10 0
90 NGC 5139 2785 RG* 13 27 54.2787373008 -47 33 15.743488644   14.205 13.200   12.060 ~ 9 0
91 NGC 5139 1830 RG* 13 28 02.4567799392 -47 38 25.570320972   14.470 13.471     ~ 13 0

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