1999A&A...343..222E

Query : 1999A&A...343..222E

1999A&A...343..222E - Astronomy and Astrophysics, volume 343, 222-228 (1999/3-1)

The Wilson-Bappu effect of the MgIIk line - dependence on stellar temperature, activity and metallicity.

ELGAROY O., ENGVOLD O. and LUND N.

Abstract (from CDS):

The Wilson-Bappu effect is investigated using accurate absolute magnitudes of 65 stars obtained through early release of data from the Hipparcos satellite together with MgII k line widths determined from high resolution spectra observed with the International Ultraviolet Explorer (IUE) observatory. Stars of spectral classes F, G, K and M and luminosity classes I-V are represented in the sample. Wilson-Bappu relations for the MgIIk line for stars of different temperatures i.e. spectral classes are determined. The relation varies with spectral class and there is a significant scatter of the line widths around the regression lines. 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. A difference in behavior between dwarfs and giants (and supergiants) of spectral class K seems to be present. Magnetic activity affects the width of the MgIIk line in dwarfs. Metallicity is found to influence the MgIIk line width in giants and supergiants. Possible interpretations of the new results are briefly discussed.

Abstract Copyright: ∼

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

Simbad objects: 66

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Number of rows : 66
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 HD 166 BY* 00 06 36.7840068588 +29 01 17.412693890   6.82 6.07 5.6   G8 356 0
2 * zet Tuc PM* 00 20 04.2586334956 -64 52 29.257190108 4.82 4.80 4.23 3.73 3.40 F9.5V 380 0
3 * 9 Cet BY* 00 22 51.7884553555 -12 12 33.969921319 7.29 7.05 6.39     G2.5V 487 0
4 * bet Hyi PM* 00 25 45.07036 -77 15 15.2860 3.52 3.41 2.79 2.28 1.94 G0V 592 0
5 * bet Cet PM* 00 43 35.37090 -17 59 11.7827 3.90 3.02 2.01 1.29 0.78 G9.5IIICH-1 525 1
6 * bet And PM* 01 09 43.92388 +35 37 14.0075 5.58 3.62 2.05 0.81 -0.19 M0+IIIa 555 1
7 * 44 And PM* 01 10 18.7404097416 +42 04 53.309986932   6.249 5.665     F8V 183 0
8 * nu. Phe PM* 01 15 11.1214282378 -45 31 53.992580679 5.65 5.54 4.96 4.47 4.11 F9VFe+0.4 256 0
9 * alf Ari PM* 02 07 10.40570 +23 27 44.7032 4.29 3.17 2.01 1.15 0.54 K2-IIIbCa-1 622 2
10 BD+47 612 PM* 02 22 14.6437562448 +47 52 48.104862600   10.85   9.104   M0V 149 0
11 V* VY Ari RS* 02 48 43.7287198695 +31 06 54.592461256   7.72   6.4   G9 225 0
12 HD 17925 RS* 02 52 32.1281856011 -12 46 10.968056223 7.48 6.91 6.05 5.34 4.89 K1V 514 0
13 * kap01 Cet BY* 03 19 21.6964175772 +03 22 12.714979884 5.71 5.52 4.85 4.27 3.91 G5V 890 0
14 HD 21531 SB* 03 27 52.40603 -19 48 16.1409 10.995 9.712 8.367 7.548 6.818 K5V 120 0
15 * 39 Tau ** 04 05 20.2580439192 +22 00 32.057399592   6.54 5.90 5.5   G5V 220 0
16 * 50 Per RS* 04 08 36.6171573432 +38 02 23.058806100 7.78 5.97   5.2   F8V 218 0
17 * eps Ret PM* 04 16 29.0281470260 -59 18 07.755891304 6.59 5.52 4.44 3.62 3.08 K2III 238 1
18 HD 28343 Er* 04 29 00.1238230176 +21 55 21.717292296 10.988 9.688 8.300 7.446 6.656 M0.5V 193 0
19 * alf Tau LP? 04 35 55.23907 +16 30 33.4885 4.32 2.40 0.86 -0.37 -1.31 K5+III 1255 2
20 * bet Cae PM* 04 42 03.4822983552 -37 08 39.588865224   5.42 5.05     F3IV 97 0
21 * alf Aur SB* 05 16 41.35871 +45 59 52.7693 1.33 0.88 0.08 -0.52 -0.96 G3III: 1177 0
22 * 111 Tau B PM* 05 23 38.3794959384 +17 19 26.820864372 10.093 9.048 7.919 7.266 6.703 K4V 126 0
23 HD 37394 BY* 05 41 20.3356800431 +53 28 51.808818686 7.58 7.07 6.23 5.54 5.11 K1 329 0
24 * 36 Dor PM* 05 54 06.0545851778 -63 05 23.209034464   5.70 4.66     K2III-IV 106 0
25 * chi01 Ori RS* 05 54 22.9829893 +20 16 34.222038 5.08 5.00 4.40 3.90 3.59 G0V 851 0
26 * 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 1670 0
27 HD 260655 PM* 06 37 10.7988015297 +17 33 53.333221083 12.303 11.104 9.593 8.661 7.718 M0.0V 176 0
28 HD 52698 PM* 07 01 13.7314874136 -25 56 55.491750492 8.203 7.58 6.688     K1V 83 0
29 V* YZ CMi Er* 07 44 40.1723046464 +03 33 08.875227574 13.761 12.831 11.225 9.958 8.263 M4.0Ve 885 0
30 * B Car SB* 08 09 00.6369168474 -61 18 08.545898653   5.163 4.742     F6VFe-0.8CH-0.4 163 0
31 HD 72673 PM* 08 32 51.4956803280 -31 30 03.064960317   7.17 6.38     K1V 214 0
32 HD 74576 PM* 08 43 18.0303716918 -38 52 56.570847350   7.49 6.56     K3V 141 0
33 * 11 LMi RS* 09 35 39.5021937366 +35 48 36.477051175 6.560 6.110 5.340 4.79 4.42 G8Va 372 0
34 HD 88230 Er* 10 11 22.1399492383 +49 27 15.251007087 9.23 7.94 6.61 5.36 4.56 K6VeFe-1 462 0
35 * 47 UMa PM* 10 59 27.9727514012 +40 25 48.920572724   5.66   4.7   G1-VFe-0.5 773 1
36 * 61 UMa PM* 11 41 03.0162706212 +34 12 05.881605449 6.31 6.08 5.34 4.73 4.38 G8V 612 0
37 HD 104304 PM* 12 00 44.4601479291 -10 26 46.067117528 6.76 6.32 5.55     G8IV 239 0
38 * alf Crv PM* 12 08 24.8172764085 -24 43 43.952148016   4.33 4.01     F1V 180 0
39 * gam Cru PM* 12 31 09.95961 -57 06 47.5684 5.01 3.23 1.64 -0.02 -1.44 M3.5III 278 1
40 * 10 CVn PM* 12 44 59.4049642264 +39 16 44.098132297 6.47 6.50 5.95 5.41 5.12 F9V_Fe-0.3 372 0
41 HD 115043 PM* 13 13 37.0081725552 +56 42 29.759356008   7.423 6.813     G1Va 255 0
42 * 70 Vir PM* 13 28 25.8085908881 +13 46 43.638308807 5.930 5.680 4.970 4.37 3.98 G4Va 715 1
43 * tet Cen PM* 14 06 40.94752 -36 22 11.8371 3.94 3.04 2.05 1.29 0.76 K0-IIIb 252 1
44 * 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 2318 1
45 * alf Cen A SB* 14 39 36.49400 -60 50 02.3737 0.96 0.72 0.01     G2V 1280 1
46 * 42 Lib * 15 40 16.8973226160 -23 49 05.101136148 7.80 6.29 4.96 4.00 3.32 K3-IIICN2 115 0
47 * alf Ser PM* 15 44 16.0741095811 +06 25 32.268792881 5.080 3.800 2.630 1.82 1.25 K2IIIbCN1 518 0
48 BD+55 1823 SB* 16 17 05.3518858129 +55 16 08.771396846 12.00 10.92 9.46 9.552 8.55 M1.5Ve 200 0
49 * alf TrA * 16 48 39.89508 -69 01 39.7626   3.33 1.88     K2III_Ba1 242 0
50 * eps Sco PM* 16 50 09.8108127 -34 17 35.633735 4.61 3.45 2.29 1.43 0.83 K1III 217 0
51 * w Her RG* 17 20 39.5674498400 +32 28 03.877958860 6.08 6.01 5.39 4.89 4.56 G0V 451 0
52 * bet Dra * 17 30 25.9616959 +52 18 04.999351 4.43 3.79 2.81 2.12 1.64 G2Ib-IIa 415 0
53 * del Sgr * 18 20 59.6428936493 -29 49 41.168145329   4.069 2.668     K2.5IIIaCN0.5 175 0
54 HD 183650 PM* 19 29 21.4443359218 +31 36 31.163027581   7.67   6.5   G6 80 0
55 HD 191408 PM* 20 11 11.9387690214 -36 06 04.351725607   5.44 5.32     K2.5V 268 1
56 HD 191408B PM* 20 11 12.8028949300 -36 06 32.166102762           M3.5 226 1
57 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 357 0
58 HD 197481 BY* 20 45 09.5324974119 -31 20 27.237889841   10.05 8.627 9.078 6.593 M1VeBa1 1153 0
59 * eta Cep PM* 20 45 17.3751675120 +61 50 19.614231888 4.960 4.320 3.410 2.76 2.27 K0IV 445 0
60 V* AX Mic Er* 21 17 15.2690680973 -38 52 02.503938581   8.06 6.68     M1V 224 0
61 * zet Cap SB* 21 26 40.0306553034 -22 24 40.753242596 5.35 4.75 3.74 3.09 2.65 G4Ib:Ba2 280 1
62 * bet Aqr * 21 31 33.5320760349 -05 34 16.229381029 4.27 3.71 2.89 2.29 1.84 G0Ib 447 0
63 V* HN Peg BY* 21 44 31.3299461136 +14 46 18.983292600       6.16   G0V+ 515 0
64 * eps Ind PM* 22 03 21.6536261624 -56 47 09.522795714   5.75 4.69     K5V 551 0
65 * alf Aqr * 22 05 47.0355458275 -00 19 11.463439527 4.65 3.90 2.94 2.27 1.76 G2Ib 437 0
66 * lam And RS* 23 37 33.8427800830 +46 27 29.344721109 5.54 4.84 3.82 3.04 2.47 G8IVk 668 0

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