2011A&A...526A.127P


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST02:41:24

2011A&A...526A.127P - Astronomy and Astrophysics, volume 526A, 127-127 (2011/2-1)

Gravitational redshifts in main-sequence and giant stars.

PASQUINI L., MELO C., CHAVERO C., DRAVINS D., LUDWIG H.-G., BONIFACIO P. and DE LA REZA R.

Abstract (from CDS):

Precise analyses of stellar radial velocities is able to reveal intrinsic causes of the wavelength shifts of spectral lines (other than Doppler shifts due to radial motion), such as gravitational redshifts and convective blueshifts. Gravitational redshifts in solar-type main-sequence stars are expected to be some 500 m/s greater than those in giants. We search for this difference in redshifts among groups of open-cluster stars that share the same average space motion and thus have the same average Doppler shift. We observed 144 main-sequence stars and cool giants in the M67 open cluster using the ESO FEROS spectrograph and obtained radial velocities by means of cross-correlation with a spectral template. Binaries and doubtful members were not analyzed, and average spectra were created for different classes of stars. The M67 dwarf and giant radial-velocity distributions are each well represented by Gaussian functions, which share the same apparent average radial velocity to within ≃100m/s. In addition, dwarfs in M67 appear to be dynamically hotter (σ=0.90km/s) than giants (σ=0.68km/s). We fail to detect any difference in the gravitational redshifts of giants and MS stars. This is probably because of the differential wavelength shifts produced by the different hydrodynamics of dwarf and giant atmospheres. Radial-velocity differences measured between unblended lines in averaged spectra vary with line-strength: stronger lines are more blueshifted in dwarfs than in giants, apparently removing any effect of the gravitational redshift. Synthetic high-resolution spectra are computed from three dimensional (3D) hydrodynamic model atmospheres for both giants and dwarfs, and synthetic wavelength shifts obtained. In agreement with observations, 3D models predict substantially smaller wavelength-shift differences than expected from gravitational redshifts only. The procedures developed could be used to test 3D models for different classes of stars, but will ultimately require high-fidelity spectra for measurements of wavelength shifts in individual spectral lines.

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - galaxies: star clusters: individual: M 67 - stars: late-type - stars: atmospheres - techniques: radial velocities - gravitation

VizieR on-line data: <Available at CDS (J/A+A/526/A127): table1.dat>

Simbad objects: 150

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Number of rows : 150

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1091 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5665 1
3 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2978 0
4 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2654 0
5 * alf CMa SB* 06 45 08.91728 -16 42 58.0171 -1.51 -1.46 -1.46 -1.46 -1.43 A1V+DA 1395 0
6 * alf CMa B WD* 06 45 09.3021501316 -16 43 00.716804119   8.41 8.44     DA1.9 493 1
7 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1758 0
8 Cl* NGC 2682 SAND 288 * 08 49 27.8124055286 +12 14 05.003085054   16.06 15.526     ~ 4 0
9 Cl* NGC 2682 SAND 219 * 08 49 28.9804795975 +11 22 33.830214083   17.02 16.06     ~ 3 0
10 Cl* NGC 2682 SAND 266 * 08 49 31.6770136032 +11 57 19.549019881   14.64 13.957     ~ 5 0
11 BD+12 1917 V* 08 49 56.8182885189 +11 41 32.987996729   11.2 9.782   8.540 K3III 46 1
12 BD+12 1919 V* 08 50 12.3010520522 +11 51 24.501571988   10.395 9.098 8.842   K5 53 0
13 BD+12 1920 RB? 08 50 18.2737761035 +11 55 21.207324374   10.994 9.909   8.890 ~ 31 0
14 Cl* NGC 2682 SAND 676 RB? 08 50 21.0991128622 +12 21 11.691712858   11.83 10.464     ~ 20 0
15 Cl* NGC 2682 SAND 602 V* 08 50 28.3327340689 +11 42 09.828425349   13.50 12.902     ~ 16 0
16 Cl* NGC 2682 SAND 657 * 08 50 29.8753959664 +12 08 07.011382704   13.21 12.619     ~ 14 0
17 NGC 2682 3 V* 08 50 33.9218509294 +11 46 27.287960764 13.412 13.43 12.860   12.191 ~ 19 0
18 Cl* NGC 2682 SAND 598 V* 08 50 34.3879297487 +11 39 56.724622466 13.288 13.23 12.594   11.926 G0IV 19 0
19 NGC 2682 4 RG* 08 50 36.1345840131 +11 43 18.095602992 14.180 13.72 12.689   11.746 G8IV 22 0
20 Cl* NGC 2682 SAND 656 * 08 50 38.5052708956 +12 07 45.793293262   13.72 13.192     ~ 9 0
21 Cl* NGC 2682 SAND 613 SB* 08 50 38.8979949353 +11 46 55.654492089 16.829 16.40 15.411   14.401 ~ 10 0
22 NGC 2682 6 * 08 50 40.7920544882 +11 47 46.234778549 13.334 13.355 12.839   12.165 F7V 15 0
23 Cl* NGC 2682 SAND 745 SB* 08 50 46.0915011135 +11 43 08.298895338 13.686 13.71 13.077   12.435 F9V 14 0
24 Cl* NGC 2682 SAND 721 SB* 08 50 49.6387570725 +11 35 08.948103872   11.76 11.178 10.972 10.170 K1III 31 0
25 NGC 2682 20 V* 08 50 49.9468814917 +11 49 12.773279778 14.186 13.78 12.889   11.998 G8V 42 0
26 Cl* NGC 2682 SAND 711 SB* 08 50 53.0574580794 +11 31 20.151806162   13.95 13.390     F5V 12 0
27 NGC 2682 24 SB* 08 50 53.1652747575 +11 47 34.211328214 13.922 13.91 13.307 13.199 12.593 ~ 21 0
28 NGC 2682 28 * 08 50 54.3946926920 +11 56 29.079511505 13.385 13.32 12.761     F8IV 25 0
29 Cl* NGC 2682 SAND 694 * 08 50 55.2544040427 +11 17 35.210716431   13.80 12.847     ~ 9 0
30 Cl* NGC 2682 SAND 723 Ro* 08 50 55.6710199740 +11 35 35.497959949   13.93 13.351   12.664 ~ 14 0
31 Cl* NGC 2682 SAND 827 * 08 50 57.0257769196 +11 59 15.903621106 13.726 13.69 13.119     ~ 12 0
32 Cl* NGC 2682 SAND 809 * 08 50 57.6201247411 +11 55 14.698443093 14.052 13.98 13.368   12.727 F7V 13 0
33 NGC 2682 37 RB? 08 50 58.1578655200 +11 52 22.371464914 14.489 13.8 12.806   11.881 K0IV 55 0
34 NGC 2682 39 SB* 08 50 58.422 +11 42 12.00   14.09 13.280   12.595 G2V 11 0
35 Cl* NGC 2682 SAND 816 SB* 08 50 59.2371180411 +11 56 36.866306643 13.845 13.80 13.213   12.545 ~ 15 0
36 NGC 2682 44 V* 08 50 59.7258398935 +11 39 52.541392603 13.598 13.59 13.053   12.389 F9V 19 0
37 NGC 2682 45 SB* 08 50 59.7602442404 +11 39 22.274668995 14.983 14.07 12.895   11.746 K4V 15 0
38 NGC 2682 46 Ro* 08 51 00.1707001809 +11 54 32.147054160 13.991 13.541 12.764   11.889 G5IV 41 0
39 NGC 2682 62 SB* 08 51 02.1218567309 +11 49 01.305910707 14.013 13.90 13.297   12.579 G0V 14 0
40 Cl* NGC 2682 SAND 736 SB* 08 51 03.6468460879 +11 40 31.020477165 13.938 13.92 13.373   12.683 F9V 10 0
41 NGC 2682 72 RG* 08 51 08.3844379895 +11 47 12.148592497   13.39 12.315     F0V 56 0
42 NGC 2682 73 * 08 51 08.5681861649 +11 50 53.061264221 14.471 14.39 13.779 13.450 13.096 G0V 25 0
43 NGC 2682 77 SB* 08 51 09.2444894075 +11 48 20.655227950 14.005 13.93 13.349   12.692 G0V 16 0
44 Cl* NGC 2682 SAND 1090 * 08 51 12.1289097990 +11 54 40.439527906 16.510 16.12 15.315   14.441 ~ 9 0
45 NGC 2682 84 RG* 08 51 12.6931812504 +11 52 42.448865345   11.629 10.393 10.234 9.500 K1III 102 0
46 Cl* NGC 2682 SAND 927 Ro* 08 51 14.0449828036 +11 33 30.587290636   13.85 13.313     ~ 12 0
47 NGC 2682 91 * 08 51 14.7599767171 +11 47 24.023014836 13.454 13.38 12.823   12.145 F8V 20 0
48 NGC 2682 94 * 08 51 15.3440226762 +11 50 14.360426127 13.469 13.38 12.788   12.143 F8: 42 0
49 NGC 2682 36 RB? 08 51 15.6377774063 +11 50 56.226464035 14.310 13.87 13.015   12.10 G9V 29 0
50 NGC 2682 98 * 08 51 15.7593061799 +11 52 58.823715112 13.507 13.4 12.817   12.146 F9IV 21 0
51 NGC 2682 101 * 08 51 16.7878892894 +11 50 39.022947982 13.819 13.75 13.173 12.839 12.488 G0V 18 0
52 NGC 2682 103 * 08 51 16.9813021589 +11 50 09.446465246 13.809 13.73 13.156 12.852 12.52 G0V 21 0
53 NGC 2682 104 RG* 08 51 17.0401829547 +11 50 46.503449364   12.114 11.001 10.863 10.12 K0III/IV 63 0
54 NGC 2682 105 RG* 08 51 17.0998688216 +11 48 16.177322855   11.554 10.316 9.942 9.07 K2III 122 0
55 NGC 2682 106 V* 08 51 17.3468039630 +11 47 00.666533935 13.671 13.638 13.069   12.393 ~ 51 0
56 NGC 2682 108 RG* 08 51 17.4856199463 +11 45 22.709284546   11.064 9.603 9.370 8.36 ~ 110 1
57 NGC 2682 109 SB* 08 51 17.7447266308 +11 50 05.595716228 14.120 14.08 13.586   12.820 F9V 16 0
58 Cl* NGC 2682 SAND 986 Al* 08 51 17.9840273340 +11 45 54.335697597 13.363 13.28 12.733   12.04 ~ 70 0
59 NGC 2682 OpC 08 51 18 +11 48.0           ~ 2032 0
60 NGC 2682 114 * 08 51 18.3365080620 +11 43 25.200674056 14.013 13.97 13.399   12.720 F9V 18 0
61 NGC 2682 115 V* 08 51 18.5413357444 +11 49 21.514285478 13.309 13.26 12.645 12.274 11.924 F9IV 64 0
62 Cl* NGC 2682 ES IV-96 RG* 08 51 18.9732437069 +11 58 11.039336486 13.989 13.30 12.272     ~ 28 0
63 Cl* NGC 2682 SAND 1135 * 08 51 20.0987009223 +12 18 10.432046331 12.58 10.786 9.324 9.113   K2 37 0
64 NGC 2682 127 V* 08 51 20.1237965086 +11 46 41.753630000 13.336 13.32 12.776   12.08 ~ 71 0
65 NGC 2682 126 * 08 51 20.1258087923 +11 50 23.258818911 14.586 14.54 13.978 13.610 13.241 G0V 22 0
66 NGC 2682 125 * 08 51 20.1573533903 +11 52 48.017387166 14.533 14.44 13.913   13.179 ~ 35 0
67 NGC 2682 128 * 08 51 20.3300303333 +11 45 52.481234197 13.782 13.72 13.244   12.445 ~ 53 0
68 NGC 2682 129 * 08 51 20.5508573366 +11 46 04.890695678 13.826 13.75 13.308   12.490 ~ 50 0
69 NGC 2682 135 RG* 08 51 21.5642135621 +11 46 06.216890715   12.53 11.394   10.39 K1III 87 0
70 NGC 2682 137 SB* 08 51 21.7560474196 +11 51 42.045412130   14.7 14.098   13.281 G2V 22 0
71 NGC 2682 140 Ro* 08 51 22.0511495782 +11 46 41.010432677 13.811 13.797 13.189 12.834 12.496 ~ 55 0
72 Cl* NGC 2682 JS s * 08 51 22.4057257282 +11 51 29.237619134 13.872 13.88 13.313   12.596 F9V 19 0
73 NGC 2682 141 RG* 08 51 22.8037504415 +11 48 01.780643224   11.570 10.346 10.180 9.40 ~ 119 0
74 Cl* NGC 2682 ES I-182 V* 08 51 25.9378657732 +11 33 00.081804267   13.26 12.734     G4IV 15 0
75 NGC 2682 150 * 08 51 25.9532931844 +11 49 08.962997885 13.825 13.8 13.280 12.893 12.545 F9V 21 0
76 NGC 2682 151 RG* 08 51 26.1833341306 +11 53 51.984909452   11.58 10.391     K1III 84 0
77 NGC 2682 152 * 08 51 26.5223815925 +11 49 20.339721497 14.089 14.05 13.524 13.143 12.780 F5V 17 0
78 NGC 2682 162 * 08 51 28.3018984885 +11 52 17.535424081   13.4 12.850   12.127 F8 23 0
79 Cl* NGC 2682 ES II-1 * 08 51 28.6970276626 +11 48 02.199371192 14.501 14.45 13.821   13.040 G1V 24 0
80 NGC 2682 164 RG* 08 51 28.9911734176 +11 50 33.129974313   11.675 10.441 10.250 9.46 K1III 114 0
81 NGC 2682 166 * 08 51 29.3543895938 +11 45 27.649101311 14.413 13.85 12.910   11.962 K0IV 51 0
82 BD+12 1926 RG* 08 51 29.9056917233 +11 47 16.877217672   11.004 9.555 9.360 8.36 K3III 124 0
83 Cl* NGC 2682 ES II-79 V* 08 51 29.9309214207 +11 35 11.165223065 13.322 13.33 12.773     ~ 14 0
84 NGC 2682 171 * 08 51 30.1308714884 +11 43 49.891095543 13.787 13.75 13.136   12.436 F9V 24 0
85 NGC 2682 173 RG* 08 51 30.4541028409 +11 48 58.327634271 13.834 13.12 11.731 11.594 11.08 ~ 30 0
86 NGC 2682 175 * 08 51 31.1963798058 +11 53 18.002906620 14.330 14.31 13.844   13.014 ~ 31 0
87 NGC 2682 177 * 08 51 31.9495287921 +11 53 11.760985379 13.654 13.64 13.134   12.408 F8V 16 0
88 NGC 2682 179 SB* 08 51 32.0621052937 +11 55 08.639545072 14.424 14.33 13.728   12.951 G0V 21 0
89 Cl* NGC 2682 SAND 1189 V* 08 51 32.1579973538 +11 36 12.552341551 13.887 13.86 13.332   12.608 ~ 15 0
90 NGC 2682 181 * 08 51 32.4022460532 +11 48 01.228485951 13.931 13.60 12.830 12.360 11.895 F5IV 20 0
91 NGC 2682 182 * 08 51 32.4465225192 +11 47 52.381433575 13.335 13.27 12.738 12.294 11.920 G0V 23 0
92 Cl* NGC 2682 ES II-4 * 08 51 32.5745658330 +11 48 24.134371054 14.861 14.81 14.191   13.482 G0V 23 0
93 NGC 2682 189 * 08 51 34.2793927240 +11 49 43.866743043 13.415 13.44 12.862   12.244 F8IV 29 0
94 NGC 2682 191 V* 08 51 34.4472056473 +11 37 57.437001165 13.743 13.777 13.207   12.425 F7V 21 0
95 NGC 2682 193 RG* 08 51 35.7787389120 +11 53 34.750825194 13.904 13.22 12.267   11.228 K0III 77 0
96 NGC 2682 206 * 08 51 37.9563537598 +11 58 49.259816116 14.654 13.91 12.925 12.59   ~ 12 0
97 Cl* NGC 2682 SAND 1337 * 08 51 38.0662935535 +12 01 24.417198808   13.59 13.041     ~ 11 0
98 NGC 2682 209 * 08 51 39.0508901187 +11 47 55.414119410 14.461 14.33 13.783   12.992 ~ 40 0
99 Cl* NGC 2682 ES III-35 RG* 08 51 39.3859622341 +11 51 45.672923357 13.832 13.1 12.117   11.078 K0III 48 0
100 NGC 2682 215 V* 08 51 41.2291248775 +11 54 29.073545099 13.350 13.34 12.836   12.143 F8IV 28 0
101 Cl* NGC 2682 ES II-14 * 08 51 41.4951945620 +11 47 36.174961813 14.804 14.71 14.188   13.382 G2V 29 0
102 NGC 2682 218 RG* 08 51 42.3411374693 +11 50 07.681109985   12.71 11.48     K1III 46 0
103 Cl* NGC 2682 SAND 1181 Ro* 08 51 42.3593800154 +11 32 07.125922213   13.76 13.257     F3V 13 0
104 NGC 2682 217 RG* 08 51 42.3635293595 +11 51 23.076710195   12.80 11.23     K1III 61 0
105 Cl* NGC 2682 SAND 1315 * 08 51 42.5973389623 +11 56 05.070933986 17.496 16.97 15.99 15.77 14.892 ~ 8 0
106 NGC 2682 224 RG* 08 51 43.5488551130 +11 44 26.483079596   11.894 10.686 10.460 9.660 K1III 92 0
107 NGC 2682 225 * 08 51 43.7514447713 +11 45 14.860046595 13.663 13.64 13.140   12.412 ~ 29 0
108 NGC 2682 223 RG* 08 51 43.8875881034 +11 56 42.531716904   11.658 10.476   9.500 K1III 75 0
109 NGC 2682 226 * 08 51 44.0075673304 +11 46 24.536468173 13.749 13.549 12.790   11.928 G0 51 0
110 NGC 2682 228 * 08 51 44.6532173598 +11 41 51.065498890 13.802 13.77 13.215   12.524 F8V 18 0
111 NGC 2682 227 RB? 08 51 44.7392406102 +11 46 46.049130453 14.402 13.898 13.000   11.994 K0IV 43 0
112 NGC 2682 229 * 08 51 44.7509206517 +11 45 01.305437998 13.906 13.91 13.387   12.671 F7V 17 0
113 NGC 2682 231 RG* 08 51 45.0772181969 +11 47 45.974219749   12.57 11.468     K1III 85 0
114 Cl* NGC 2682 SAND 1321 * 08 51 45.2194131546 +11 56 55.351770136 14.181 14.10 13.651     ~ 11 0
115 NGC 2682 233 * 08 51 45.9690149323 +11 44 09.367020885 13.969 13.94 13.427   12.723 F5V 17 0
116 NGC 2682 235 * 08 51 46.4157502125 +11 46 26.718019998 13.989 13.95 13.463   12.694 F8V 16 0
117 NGC 2682 237 * 08 51 48.8384728421 +11 56 51.248326946 14.453 13.82 12.982     K0IV 24 0
118 NGC 2682 241 * 08 51 49.1422058456 +11 49 43.604520202 13.385 13.31 12.759   12.025 F8IV 32 0
119 NGC 2682 243 Ro* 08 51 49.9490256108 +11 49 31.201271609 13.331 13.23 12.675   11.913 F8 37 0
120 NGC 2682 248 * 08 51 51.4586280210 +11 57 49.778924704 13.409 13.34 12.855     F8IV 13 0
121 NGC 2682 255 * 08 51 53.3522604140 +11 48 20.881248332 13.321 13.27 12.767   12.042 F8IV 28 0
122 Cl* NGC 2682 SAND 1524 * 08 51 55.6636167294 +12 17 57.381726560   13.81 13.119     ~ 16 0
123 NGC 2682 262 RB? 08 51 56.1169030056 +11 50 14.843184447 14.595 13.9 12.976   11.906 K0IV 29 0
124 NGC 2682 266 RG* 08 51 59.5227988109 +11 55 04.837738790   11.65 10.463   9.490 ~ 69 0
125 NGC 2682 267 * 08 51 59.6372716507 +11 52 57.679949251 13.454 13.37 12.878   12.115 ~ 14 0
126 NGC 2682 268 * 08 52 02.1554230962 +11 49 08.370102900 13.46 13.97 13.416   12.669 ~ 11 0
127 Cl* NGC 2682 SAND 1533 RB? 08 52 02.6252277994 +12 25 54.213175026   11.181 9.993     K0 20 0
128 Cl* NGC 2682 SAND 1441 * 08 52 02.7611795000 +11 46 03.896957068 13.739 13.72 13.227   12.468 F4V 12 0
129 NGC 2682 271 * 08 52 03.5581685527 +11 41 23.908287584 13.262 13.05 12.797   12.004 ~ 17 0
130 NGC 2682 272 * 08 52 04.7512168572 +11 58 29.083547309   13.27 12.716     ~ 14 0
131 Cl* NGC 2682 SAND 1459 * 08 52 07.1467992610 +11 49 25.462423133 14.026 14.00 13.518   12.730 ~ 9 0
132 Cl* NGC 2682 SAND 1464 * 08 52 07.4180746737 +11 50 22.161640816 13.899 13.85 13.308   12.521 ~ 12 0
133 BD+12 1930 BS* 08 52 10.7434436388 +11 44 05.870422307   10.81 10.700     A1V 51 0
134 Cl* NGC 2682 ES II-152 RG* 08 52 10.9716159318 +11 31 49.233867433   12.051 10.911   9.790 ~ 41 0
135 NGC 2682 281 V* 08 52 11.3482081962 +11 45 37.977382218 14.016 13.734 12.951   12.019 G5IV 27 0
136 Cl* NGC 2682 SAND 1557 RG* 08 52 16.5566453937 +11 19 38.231653813   11.341 10.115     ~ 35 0
137 NGC 2682 286 RG* 08 52 18.5744306643 +11 44 26.376261817   11.541 10.382   9.430 K0III 56 0
138 NGC 2682 287 V* 08 52 18.6871358531 +11 43 24.630669365   13.30 12.738     G0IV 17 0
139 Cl* NGC 2682 SAND 1583 Ro* 08 52 20.9450549277 +11 39 06.430518589   13.77 13.268     ~ 12 0
140 NGC 2682 289 V* 08 52 21.4005628439 +11 50 41.846963069   13.18 12.707     ~ 18 0
141 NGC 2682 291 RG* 08 52 26.3724421083 +11 41 27.723000177   13.30 12.530     ~ 24 0
142 Cl* NGC 2682 SAND 1553 * 08 52 30.4730268978 +11 15 32.362828257   10.41 8.823   6.680 M0 19 0
143 Cl* NGC 2682 SAND 1679 * 08 52 49.0212601965 +11 15 55.563450148   12.97 12.460     ~ 5 0
144 Cl* NGC 2682 SAND 1808 Ro* 08 52 59.6395524920 +11 40 41.401054587   13.18 12.659     ~ 8 0
145 Cl* NGC 2682 SAND 1758 * 08 52 59.9100074341 +11 07 25.428466995   12.29 11.06     ~ 6 0
146 Cl* NGC 2682 SAND 1852 * 08 53 03.9681993694 +12 11 52.726005723   16.99 16.15     ~ 3 0
147 Cl* NGC 2682 SAND 2015 * 08 53 50.2254298794 +11 43 07.892108404   13.10 12.666 12.66   ~ 10 0
148 NGC 3680 OpC 11 25 38 -43 14.6   8.40 7.6     ~ 290 0
149 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2132 0
150 NAME Galactic Bulge reg ~ ~           ~ 3389 0

    Equat.    Gal    SGal    Ecl

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2020.07.08-02:41:24

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