1997A&A...326..165E

Query : 1997A&A...326..165E

1997A&A...326..165E - Astronomy and Astrophysics, volume 326165-176 (1997/10-1)

Stellar activity and the Wilson-Bappu relation.

ELGAROY O., ENGVOLD O. and JORAS P.

Abstract (from CDS):

The MgII h and k lines of 78 single stars observed with the International Ultraviolet Explorer (IUE) observatory have been analyzed. Stars of spectral classes F, G, K and M and luminosity classes I-V are represented in the sample. From these data it is shown that the Wilson-Bappu relation for the Mg II h and k lines is fulfilled over a range of 18 magnitudes, i.e. from Mv=+12 to Mv=-6. The sample contains slowly rotating stars of different activity levels and is suitable for investigations of a possible relation between line width and stellar activity. It is found that active stars have broader lines and show a larger variation in line widths than quiet stars. Observations of the active RS CVn binary σ Gem taken at epochs when it shows different levels of activity, clearly demonstrate line broadening following higher activity. Possible implications of the new results for the interpretation of the Wilson-Bappu relation are briefly discussed.

Abstract Copyright: ∼

Journal keyword(s): stars - chromospheres - coronae - activity

Simbad objects: 80

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Number of rows : 80
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 HD 166 BY* 00 06 36.7840068588 +29 01 17.412693890   6.82 6.07 5.6   G8V 392 0
2 * 6 Cet PM* 00 11 15.8580395472 -15 28 04.720468404 5.35 5.38 4.89     F8VFe-0.8CH-0.5 334 0
3 * zet Tuc PM* 00 20 04.2586334956 -64 52 29.257190108 4.82 4.80 4.23 3.73 3.40 F9.5V 415 0
4 * 9 Cet BY* 00 22 51.7884553555 -12 12 33.969921319 7.29 7.05 6.39     G2.5V 510 0
5 * bet Hyi PM* 00 25 45.07036 -77 15 15.2860 3.52 3.41 2.79 2.28 1.94 G0V 631 0
6 * 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
7 * bet And PM* 01 09 43.92388 +35 37 14.0075 5.58 3.62 2.05 0.81 -0.19 M0+IIIa 572 1
8 * 44 And PM* 01 10 18.7404097416 +42 04 53.309986932   6.249 5.665     F8V 194 0
9 * nu. Phe PM* 01 15 11.1214282378 -45 31 53.992580679 5.65 5.54 4.96 4.47 4.11 F9VFe+0.4 281 0
10 * 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
11 BD+47 612 PM* 02 22 14.6437562448 +47 52 48.104862600   10.85   9.104   M0V 176 0
12 V* VY Ari RS* 02 48 43.7287198695 +31 06 54.592461256   7.72   6.4   G9 241 0
13 HD 17925 RS* 02 52 32.1281856011 -12 46 10.968056223 7.48 6.91 6.05 5.34 4.89 K1V 557 0
14 * kap01 Cet BY* 03 19 21.6964175772 +03 22 12.714979884 5.71 5.52 4.85 4.27 3.91 G5V 948 0
15 HD 21531 SB* 03 27 52.40603 -19 48 16.1409 10.995 9.712 8.367 7.548 6.818 K5V 132 0
16 HD 22468 RS* 03 36 47.2904292073 +00 35 15.943692002 7.09 6.79 5.90     K2:Vnk 1206 0
17 * 39 Tau ** 04 05 20.2580439192 +22 00 32.057399592   6.54 5.90 5.5   G5V 235 0
18 * 50 Per RS* 04 08 36.6171573432 +38 02 23.058806100 7.78 5.97   5.2   F8V 238 0
19 * eps Ret PM* 04 16 29.0281470260 -59 18 07.755891304 6.59 5.52 4.44 3.62 3.08 K2III 262 1
20 HD 28343 PM* 04 29 00.1238230176 +21 55 21.717292296 10.988 9.688 8.300 7.446 6.656 M0.5V 224 0
21 * alf Tau LP? 04 35 55.23907 +16 30 33.4885 4.32 2.40 0.86 -0.37 -1.31 K5+III 1298 2
22 * bet Cae PM* 04 42 03.4822983552 -37 08 39.588865224   5.42 5.05     F3IV 102 0
23 * alf Aur SB* 05 16 41.35871 +45 59 52.7693 1.33 0.88 0.08 -0.52 -0.96 G3III: 1207 0
24 * 111 Tau B PM* 05 23 38.3794959384 +17 19 26.820864372 10.093 9.048 7.919 7.266 6.703 K4V 141 0
25 * nu.02 Col PM* 05 37 44.6176295592 -28 41 22.884909396   5.77 5.31     F5V 110 0
26 HD 37394 BY* 05 41 20.3356800431 +53 28 51.808818686 7.58 7.07 6.23 5.54 5.11 K0V 365 0
27 * 36 Dor PM* 05 54 06.0545851778 -63 05 23.209034464   5.70 4.66     K2III-IV 114 0
28 * chi01 Ori SB* 05 54 22.9829893 +20 16 34.222038 5.08 5.00 4.40 3.90 3.59 G0V 895 0
29 * alf Ori s*r 05 55 10.30536 +07 24 25.4304 4.38 2.27 0.42 -1.17 -2.45 M1-M2Ia-Iab 1789 0
30 * 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
31 HD 260655 PM* 06 37 10.7988015297 +17 33 53.333221083 12.303 11.104 9.593 8.661 7.718 M0.0V 217 0
32 HD 52698 SB* 07 01 13.7314874136 -25 56 55.491750492 8.203 7.58 6.688     K1V 97 0
33 * sig Gem RS* 07 43 18.7276907303 +28 53 00.631838445 6.38 5.41 4.29 3.37 2.79 K1IIIe 499 0
34 V* YZ CMi PM* 07 44 40.1723046464 +03 33 08.875227574 13.761 12.831 11.225 9.958 8.263 M4.0Ve 957 0
35 * B Car SB* 08 09 00.6369168474 -61 18 08.545898653   5.163 4.742     F6VFe-0.8CH-0.4 175 0
36 HD 72673 PM* 08 32 51.4956803280 -31 30 03.064960317   7.17 6.38     K1V 242 0
37 HD 74576 PM* 08 43 18.0303716918 -38 52 56.570847350   7.49 6.56     K3V 157 0
38 * lam Vel s*r 09 07 59.75787 -43 25 57.3273 5.67 3.86 2.21 0.97 0.03 K4Ib 230 0
39 * 11 LMi RS* 09 35 39.5021937366 +35 48 36.477051175 6.560 6.110 5.340 4.79 4.42 G8Va 407 0
40 HD 88230 PM* 10 11 22.1399492383 +49 27 15.251007087 9.23 7.94 6.61 5.36 4.56 K6VeFe-1 494 0
41 V* AD Leo PM* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1469 1
42 * 47 UMa PM* 10 59 27.9727514012 +40 25 48.920572724   5.66   4.7   G1-VFe-0.5 824 1
43 * 61 UMa PM* 11 41 03.0162706212 +34 12 05.881605449 6.31 6.08 5.34 4.73 4.38 G8V 654 0
44 HD 104304 SB* 12 00 44.4601479291 -10 26 46.067117528 6.76 6.32 5.55     G8IV 264 0
45 * alf Crv PM* 12 08 24.8172764085 -24 43 43.952148016   4.33 4.01     F1V 202 0
46 * gam Cru PM* 12 31 09.95961 -57 06 47.5684 5.01 3.23 1.64 -0.02 -1.44 M3.5III 291 1
47 * 10 CVn PM* 12 44 59.4049642264 +39 16 44.098132297 6.47 6.50 5.95 5.41 5.12 F9V_Fe-0.3 400 0
48 HD 115043 PM* 13 13 37.0081725552 +56 42 29.759356008   7.423 6.813     G1Va 274 0
49 * 70 Vir PM* 13 28 25.8085908881 +13 46 43.638308807 5.930 5.680 4.970 4.37 3.98 G4Va 754 1
50 * tet Cen PM* 14 06 40.94752 -36 22 11.8371 3.94 3.04 2.05 1.29 0.76 K0-IIIb 262 1
51 * 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
52 * alf Cen A SB* 14 39 36.49400 -60 50 02.3737 0.96 0.72 0.01     G2V 1352 1
53 * 42 Lib * 15 40 16.8973226160 -23 49 05.101136148 7.80 6.29 4.96 4.00 3.32 K3-IIICN2 121 0
54 * alf Ser PM* 15 44 16.0741095811 +06 25 32.268792881 5.080 3.800 2.630 1.82 1.25 K2IIIbCN1 533 0
55 BD+55 1823 SB* 16 17 05.3518858129 +55 16 08.771396846 12.00 10.92 9.46 9.552 8.55 M1.5Ve 220 0
56 * 12 Oph BY* 16 36 21.4496896968 -02 19 28.513024233 7.00 6.55 5.77 5.13 4.74 K1V 525 0
57 * alf TrA * 16 48 39.89508 -69 01 39.7626   3.33 1.88     K2III_Ba1 251 0
58 * eps Sco PM* 16 50 09.8108127 -34 17 35.633735 4.61 3.45 2.29 1.43 0.83 K1III 228 0
59 * w Her RG* 17 20 39.5674498400 +32 28 03.877958860 6.08 6.01 5.39 4.89 4.56 G0V 481 0
60 * bet Dra * 17 30 25.9616959 +52 18 04.999351 4.43 3.79 2.81 2.12 1.64 G2Ib-IIa 428 0
61 * del Sgr * 18 20 59.6428936493 -29 49 41.168145329   4.069 2.668     K2.5IIIaCN0.5 184 0
62 * b Aql PM* 19 24 58.1999714302 +11 56 39.888480530 6.35 5.93   4.7   G7IVHdel1 522 0
63 HD 183650 PM* 19 29 21.4443359218 +31 36 31.163027581   7.67   6.5   G6 90 0
64 HD 191408 PM* 20 11 11.9387690214 -36 06 04.351725607   5.44 5.32     K2.5V 294 1
65 HD 191408B PM* 20 11 12.8028949300 -36 06 32.166102762           M3.5 230 1
66 * alf Ind PM* 20 37 34.0321723878 -47 17 29.405217299 4.90 4.11 3.11     K0III-IV 141 0
67 V* AT Mic Er* 20 41 51.15925 -32 26 06.8283 12.753 11.909 10.343 9.098 7.383 M4.5Ve+M4.5Ve 371 0
68 HD 197481 BY* 20 45 09.5324974119 -31 20 27.237889841   10.05 8.627 9.078 6.593 M1VeBa1 1344 0
69 * eta Cep PM* 20 45 17.3751675120 +61 50 19.614231888 4.960 4.320 3.410 2.76 2.27 K0IV 461 0
70 V* AX Mic PM* 21 17 15.2690680973 -38 52 02.503938581   8.06 6.68     M1V 249 0
71 * zet Cap SB* 21 26 40.0306553034 -22 24 40.753242596 5.35 4.75 3.74 3.09 2.65 G4Ib:Ba2 293 1
72 * bet Aqr * 21 31 33.5320760349 -05 34 16.229381029 4.27 3.71 2.89 2.29 1.84 G0Ib 463 0
73 V* HN Peg BY* 21 44 31.3299461136 +14 46 18.983292600       6.16   G0V+ 561 0
74 * eps Ind PM* 22 03 21.6536261624 -56 47 09.522795714   5.75 4.69     K5V 616 0
75 * alf Aqr * 22 05 47.0355458275 -00 19 11.463439527 4.65 3.90 2.94 2.27 1.76 G2Ib 451 0
76 V* FL Aqr SB* 22 38 45.2812778993 -20 36 51.810236490   13.08 11.49 11.22 8.77 M3.5V 148 0
77 V* FK Aqr SB* 22 38 45.5746238605 -20 37 16.087447076 11.714 10.595 9.083 8.073 6.876 M0Vep 302 0
78 * 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
79 * 56 Peg SB* 23 07 06.7418870416 +25 28 05.773861158 7.20 6.06 4.74 3.74 3.07 K0.5II:Ba1CN-2CH-0.5 270 0
80 * lam And RS* 23 37 33.8427800830 +46 27 29.344721109 5.54 4.84 3.82 3.04 2.47 G8IVk 693 0

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