1999A&A...352..217G

Query : 1999A&A...352..217G

1999A&A...352..217G - Astronomy and Astrophysics, volume 352217-227 (1999/12-1)

Evolution of X-ray activity and rotation on G-K giants.

GONDOIN P.

Abstract (from CDS):

The recent availability of stellar parallaxes provided by the Hipparcos star catalogue (ESA, 1997HIP...C......0E) enables an accurate determination of the positions of single field giants in a theoretical H-R diagram and a reliable estimate of their masses. The present study combines these new astrometric data with previously published X-ray fluxes and rotational velocities. The results confirm the existence of a sharp decrease of X-ray emission at spectral type K1 for 2.5 M☉<M<5M☉ giants. The study shows that the rotational velocity of these stars reaches a minimum at the same location in the H-R diagram. However, no tight relationship between X-ray luminosities and projected equatorial velocities was found among the sample stars. I suggest that these results could reflect the importance of differential rotation in determining the level of coronal emission among ≥2.5M☉ G and K giants. The restoration of rigid rotation at the bottom of the red giant branch could prevent the maintenance of large scale magnetic fields, thus explaining the sharp decrease of coronal X-ray emission at spectral type K1.

Abstract Copyright: ∼

Journal keyword(s): stars: activity - stars: evolution - stars: late-type

Simbad objects: 94

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Number of rows : 94
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 * eps And PM* 00 38 33.3474310042 +29 18 42.311618884 5.72 5.25 4.38 3.70 3.19 G7IIIFe-3CH1 286 0
2 * bet Cet PM* 00 43 35.37090 -17 59 11.7827 3.90 3.02 2.01 1.29 0.78 G9.5IIICH-1 543 1
3 * phi01 Cet PM* 00 44 11.4000904231 -10 36 34.382643011   5.773 4.767     K0III 123 0
4 * ups02 Cas Pe* 00 56 39.9051464088 +59 10 51.805287084   5.581 4.622     G8.5IIIbFe-0.5 233 0
5 * eta Cet HB* 01 08 35.3913324413 -10 10 56.151936084 5.80 4.61 3.45 2.61 2.03 K2-IIIb 239 0
6 * psi03 Psc * 01 09 49.2008972448 +19 39 30.264861132   6.263 5.562     F9IIIa 136 0
7 HD 6833 * 01 09 52.2648344184 +54 44 20.278107384 8.81 7.91 6.74     K0IIIbFe-2 204 0
8 HD 7578 * 01 16 18.9222373488 +33 06 52.989205140   7.207 6.026     K1III 49 0
9 * 94 Psc PM* 01 26 41.6791537272 +19 14 25.526087052   6.616 5.495     K1III 98 0
10 * ups Per PM* 01 37 59.5580239328 +48 37 41.563066970 6.29 4.85 3.57 2.61 1.96 K3-IIICN0.5 244 0
11 * nu. Psc * 01 41 25.8941428289 +05 29 15.401884416 7.36 5.81 4.44 3.38 2.67 K3III 248 0
12 * alf Ari PM* 02 07 10.40570 +23 27 44.7032 4.29 3.17 2.01 1.15 0.54 K2-IIIbCa-1 644 2
13 HD 13137 PM* 02 10 07.7505345864 +53 50 35.131482816   7.262 6.303     G8III 50 0
14 HD 13222 PM* 02 13 21.1460485104 +74 01 39.794160756   7.173 6.261     G8III 30 0
15 * 17 Per PM* 02 51 30.8373459264 +35 03 35.062935948 8.02 6.10 4.53 3.32 2.37 K5.5III 134 0
16 * eta Eri PM* 02 56 25.6492431840 -08 53 53.316500640 5.97 4.99 3.87 3.08 2.50 K1+IIIb 203 0
17 * alf Cet LP? 03 02 16.77307 +04 05 23.0596 6.10 4.17 2.53 1.18 0.02 M1.5IIIa 480 1
18 HD 19637 PM* 03 10 27.0469499740 +26 53 46.448567945   7.293 6.022     K3III 37 0
19 HD 19735 PM* 03 12 26.4205390296 +47 43 33.147255648   7.765 6.327     K5III 59 0
20 HD 19845 * 03 13 23.8723102200 +48 10 37.040462112   6.915 5.913     K0III 83 0
21 * 37 Tau PM* 04 04 41.7128811713 +22 04 54.946823724 6.41 5.44 4.37 3.58 3.05 K0III-IIIb 194 0
22 * pi. Tau * 04 26 36.3714456672 +14 42 49.614689520 6.39 5.67 4.69 3.97 3.46 G7IIIFe-0.5 117 0
23 * 75 Tau ** 04 28 26.3699079120 +16 21 34.829804916   6.104 4.969     K1IIIb 116 0
24 * tet01 Tau SB* 04 28 34.4979222951 +15 57 44.221169423 5.510 4.780 3.840 5.48   G9IIIFe-0.5 509 0
25 * eps Tau ** 04 28 37.0002551195 +19 10 49.563140930 5.42 4.54 3.53     G9.5IIICN0.5 628 1
26 V* YY Men Ro* 04 58 17.9369735112 -75 16 37.987856868   9.11 8.05     K1IIIp 133 0
27 * eps Lep PM* 05 05 27.6644072506 -22 22 15.724153311 6.41 4.64 3.18 2.08 1.27 K4III 169 0
28 HD 33798 ** 05 15 15.45749 +47 10 14.6314       7.55   G5III 86 0
29 * 36 Dor PM* 05 54 06.0545851778 -63 05 23.209034464   5.70 4.66     K2III-IV 114 0
30 * kap Aur PM* 06 15 22.6883791803 +29 29 53.075320396 6.17 5.36 4.35 3.55 3.01 G8.5IIIb 218 0
31 * nu.02 CMa PM* 06 36 41.0376788353 -19 15 21.169452656 5.96 5.011 3.91 3.13 2.61 K1.5III-IVFe1 282 1
32 * 6 CMi V* 07 29 47.7815351384 +12 00 23.627952074   5.812 4.531     K1III 120 0
33 * f Gem ** 07 39 28.5933680280 +17 40 28.278616584 8.53 6.61 5.05     K5.5III 87 0
34 * alf Cha PM* 08 18 31.5524679912 -76 55 11.006621351   4.448 4.047     F5VFe-0.8 113 0
35 HD 69994 PM* 08 20 20.9719290912 +20 44 51.796340124   6.942 5.798     K1III 53 0
36 * pi.02 UMa PM* 08 40 12.8171670288 +64 19 40.570243212 6.94 5.78 4.61 3.72 3.09 K1+III 185 1
37 * d Vel * 08 44 23.9470741416 -42 38 57.398847432   4.917 4.046     G6III 86 0
38 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
39 * zet Hya PM* 08 55 23.6261974442 +05 56 44.034757439 4.92 4.10 3.10 2.39 1.90 G8.5III 254 0
40 * N Vel V* 09 31 13.3181527686 -57 02 03.755222030   4.691 3.139     K5III 104 0
41 * d UMa RS* 09 34 28.8594727848 +69 49 49.226541888 5.67 5.34 4.57 3.91 3.50 G5III-IV 315 0
42 * 43 Lyn PM* 09 42 00.3424053576 +39 45 28.270330812   6.552 5.610     G8III 88 0
43 * ups01 Hya * 09 51 28.6749789221 -14 50 47.863368049 5.68 5.03 4.11 3.42 2.95 G7III 166 0
44 * gam02 Leo PM* 10 19 58.619717 +19 50 26.70347   3.4   2.2   G7IIIbFe-1.5 149 0
45 HD 92095 PM* 10 39 05.6555964840 +53 40 05.878675740   6.819 5.537     K3III 68 0
46 * nu. Hya PM* 10 49 37.4882533447 -16 11 37.129417316 5.62 4.35 3.11 2.17 1.53 K1.5IIIHdel-0.5 191 0
47 * alf Crt PM* 10 59 46.4651557828 -18 17 55.630394216 6.14 5.16 4.07 3.27 2.72 K0IIIb 224 0
48 * z Car * 11 06 32.4264772704 -62 25 26.810615136   5.622 4.606     G7.5III 55 0
49 * 56 UMa SB* 11 22 49.5779879928 +43 28 57.714470868 6.86 6.04 5.03 4.30 3.81 G8IIIa 161 0
50 HD 100055 RG* 11 31 10.2560367216 +48 47 22.461087012   7.481 6.524     G8III 30 0
51 * lam Dra V* 11 31 24.2216743198 +69 19 51.872628403 7.44 5.47 3.85 2.54 1.55 M0III-IIIaCa1 140 0
52 HD 102328 * 11 46 55.6222860288 +55 37 41.480416020   6.528 5.254     K2.5IIIbCN1 169 0
53 * eps Crv PM* 12 10 07.4805825 -22 37 11.161983 5.79 4.32 2.98 2.05 1.41 K2+IIIa 158 0
54 * 25 Com * 12 36 58.3317860232 +17 05 22.324887780   7.10 5.66     K4III 57 0
55 * 31 Com Ro* 12 51 41.9201696640 +27 32 26.565016812 5.81 5.61 4.94 4.39 4.04 G0IIIp 443 1
56 * eps Vir PM* 13 02 10.5970152536 +10 57 32.935398266 4.45 3.71 2.79 2.16 1.71 G8III-IIIb 574 0
57 HD 113994 * 13 06 22.8825383256 +62 02 30.725373948   7.158 6.154     G7III 35 0
58 V* FK Com PM* 13 30 46.7996390256 +24 13 57.781233768   9.04 8.245   7.204 G4III 384 1
59 HD 117876 RG* 13 32 48.2138325552 +24 20 48.277563036   7.09 6.10 5.5   G8II-III 136 0
60 HD 119081 PM* 13 40 39.0776359512 +28 03 54.584821836   7.48 6.18     K3III 37 0
61 * 7 Boo * 13 53 12.9300854664 +17 55 58.327270932   6.551 5.709     G5III 74 0
62 * 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 2417 1
63 * eps Boo PM* 14 44 59.2175581895 +27 04 27.200350832   3.61 2.45     K0-II-III 166 0
64 * bet UMi V* 14 50 42.32580 +74 09 19.8142 5.32 3.55 2.08 0.97 0.21 K4-III 344 1
65 * bet Boo PM* 15 01 56.7623044453 +40 23 26.046853660 5.21 4.47 3.52 2.85 2.37 G8IIIaFe-0.5 267 0
66 * 11 UMi * 15 17 05.8894632720 +71 49 26.047336872   6.384 5.015     K4III 138 1
67 HD 138852 PM* 15 30 55.7637907944 +64 12 31.295104524   6.721 5.738     K0III-IV 71 0
68 HD 140117 V* 15 39 09.5187741768 +57 55 27.934696560   7.558 6.440     K1III 37 0
69 * alf Ser PM* 15 44 16.0741095811 +06 25 32.268792881 5.080 3.800 2.630 1.82 1.25 K2IIIbCN1 533 0
70 HD 140815 * 15 45 39.5083067088 +00 53 27.719515644   7.541 6.337     K1/2III 21 0
71 * del CrB RS* 15 49 35.6469970632 +26 04 06.214310112 5.80 5.43 4.63 4.00 3.58 G5III-IVFe-1 216 0
72 * eps CrB PM* 15 57 35.2514020181 +26 52 40.366652765 6.650 5.360 4.130 3.27 2.64 K2IIIab 280 1
73 * kap Her A * 16 08 04.5256427568 +17 02 49.119104724   5.927 4.994     G7III 145 0
74 * kap Her B * 16 08 04.9454918376 +17 03 15.694905420   7.35 6.23     K0IV 68 0
75 HD 146084 * 16 14 13.6066942080 +05 54 06.650003412   7.456 6.289     K2III 35 0
76 HD 148374 ** 16 23 47.1538745923 +61 41 47.293209688       6.77   G8III 67 0
77 * eta Dra PM* 16 23 59.4863284800 +61 30 51.155139060 4.35 3.65 2.74 2.12 1.66 G8-IIIab 313 0
78 * g Dra * 16 40 55.1194824166 +64 35 20.564477206   6.045 4.842     K0IIICN-0.5CH-2Ca1 88 0
79 * eps Sco PM* 16 50 09.8108127 -34 17 35.633735 4.61 3.45 2.29 1.43 0.83 K1III 228 0
80 * kap Oph LP? 16 57 40.0975028128 +09 22 30.104472450 5.52 4.36 3.20 2.36 1.82 K2III 314 0
81 HD 154391 PM* 17 01 16.9254812328 +60 38 55.515611040   7.164 6.143     K1III 88 0
82 * f Dra RG* 17 31 57.8711593056 +68 08 06.090797328   6.135 5.074     G9IIIb 92 0
83 * 29 Dra RS* 17 32 41.2152041592 +74 13 38.490729348   7.691 6.627     K0+DA1.5 167 0
84 * ksi Her LP* 17 57 45.8856741278 +29 14 52.366005079 5.34 4.64 3.70 3.01 2.55 G8.5III 252 0
85 * nu. Oph PM* 17 59 01.5922136612 -09 46 25.080976810 5.20 4.33 3.34 2.64 2.16 G9IIIa 226 1
86 * 23 Vul ** 20 15 46.1431963200 +27 48 51.116016096 6.89 5.78 4.52 3.56 2.85 K3-IIIFe-1 117 1
87 HD 199178 Ro* 20 53 53.6520433056 +44 23 11.080108284   8.01 7.22     G5III-IV 222 1
88 * rho Cyg PM* 21 33 58.8530450102 +45 35 30.620055459 5.47 4.91 4.02 3.31 2.81 G8IIIFe-0.5 211 0
89 * 25 Cep * 22 18 12.6478522512 +62 48 15.804136584   7.010 5.741     K2III 29 0
90 * bet Gru LP? 22 42 40.05027 -46 53 04.4752 5.33 3.73 2.11 0.20 -1.57 M4.5III 209 1
91 * mu. Peg PM* 22 50 00.1930748087 +24 36 05.692620534 5.10 4.42 3.48 2.80 2.33 G8+III 304 0
92 * ups Peg PM* 23 25 22.7828725585 +23 24 14.762916815 5.15 5.01 4.40 3.86 3.54 F8III 263 0
93 * gam Cep SB* 23 39 20.9104133784 +77 37 56.510781384 5.190 4.250   2.6   K1III-IVCN1 626 1
94 V* OU And Ro* 23 49 40.9595121216 +36 25 31.013370732   6.69 5.90     G1IIICaIIem 159 0

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