2004PASP..116..604S

Query : 2004PASP..116..604S

2004PASP..116..604S - Publ. Astron. Soc. Pac., 116, 604-609 (2004/July-0)

Ca II K emission-line asymmetries among red giants.

SMITH G.H. and SHETRONE M.D.

Abstract (from CDS):

Measurements of the asymmetry of the K2emission line of Ca II have been made for a sample of bright field giants with B-V>1.15 observed with the Cassegrain echelle spectrometer on the McDonald Observatory 2.1 m telescope. The asymmetry of the Ca II K2line is quantified through measurement of a parameter V/R, which is defined as the ratio between the maximum counts recorded in the violet and red components of the double-peaked emission profile. Red-maximum asymmetry (V/R<1.0) is found in our sample of 35 giants only among stars with B-V>1.35, a trend that is still maintained (with one exception) with the inclusion of an additional sample of giants previously observed by us with the same spectrograph. Although exceptional stars can be found in the literature, the data support an earlier finding by R. Stencel that among luminosity class III field giants the occurrence of V/R<1.0 is generally restricted to effective temperatures cooler than 4320 K. This limit may coincide with the onset of pulsation.

Abstract Copyright: ∼

Journal keyword(s): Stars: Chromospheres - Stars: Evolution - Stars: Winds, Outflows

Simbad objects: 47

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Number of rows : 47
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 * chi Peg PM* 00 14 36.1642825005 +20 12 24.130377664 8.280 6.380 4.800 3.45 2.32 M2+III 197 0
2 * del And SB* 00 39 19.6031132231 +30 51 39.540873571 6.04 4.56 3.28 2.36 1.70 K3III-IIIbCN0.5 340 0
3 HD 4730 PM* 00 49 25.6169251248 -13 33 40.575789900   6.925 5.594     K3III 60 0
4 HD 6953 PM* 01 10 19.4501521344 +25 27 27.943770168   7.281 5.797     K5III-IIIb 53 0
5 * mu. Psc PM* 01 30 11.1150260499 +06 08 37.758162354 7.75 6.22 4.84 3.78 3.04 K3III 192 0
6 * 56 Cet PM* 01 56 40.2026205216 -22 31 36.424867800   6.27 4.85     K3III 36 0
7 * 69 Cet V* 02 21 56.6276398416 +00 23 44.420597916   6.921 5.287     M1/2III 37 0
8 HD 15694 * 02 31 30.0954126240 +02 16 01.858512468   6.530 5.269     K2III 70 0
9 * 14 Tri SB* 02 32 06.1697711376 +36 08 50.181275364   6.627 5.144     K5III 90 0
10 HD 19349 * 03 06 33.4943946528 -06 05 18.779128836   6.808 5.256     M2/3II 48 0
11 * 63 Ari PM* 03 22 45.2413346588 +20 44 31.441872346   6.44 5.13     K3III 135 0
12 * sig Per V* 03 30 34.4853660216 +47 59 42.778854240 7.25 5.71 4.36     K3-III 135 0
13 * 39 Eri PM* 04 14 23.6878980552 -10 15 22.620462156 7.18 6.07 4.90 4.01 3.44 K2III 121 0
14 HD 28413 * 04 25 05.3369366208 -61 14 17.491400700   7.467 5.922     K4/5III 26 0
15 * eps Lep PM* 05 05 27.6644072506 -22 22 15.724153311 6.41 4.64 3.18 2.08 1.27 K4III 169 0
16 * sig Aur * 05 24 39.1414789752 +37 23 07.256761044   6.435 4.996     K3IIICN+2 68 0
17 * 40 Cam * 06 15 40.5367282584 +59 59 56.272874532   6.703 5.351     K3III 44 0
18 * 17 Mon * 06 47 19.8301708488 +08 02 14.122870224 7.82 6.17 4.77 3.74 3.04 K4III 125 0
19 * tau Pup SB* 06 49 56.1691452909 -50 36 52.339311041   4.13 2.93     K1III 116 0
20 * ups01 Hya * 09 51 28.6749789221 -14 50 47.863368049 5.68 5.03 4.11 3.42 2.95 G7III 166 0
21 * del Crt PM* 11 19 20.4473515372 -14 46 42.743409457 5.66 4.67 3.56 2.73 2.13 G9IIICH0.5 180 0
22 * C03 Cen PM* 11 37 33.9972508728 -47 44 50.273112768   6.674 5.456     K2III 33 0
23 V* TY Vir LP? 11 51 50.1113014296 -05 45 44.183830536   9.668 7.97 7.57   G3Ibp 131 0
24 HD 110184 SB* 12 40 14.0781612216 +08 31 38.057301300 10.20 9.45 8.27 8.52   KIIvw 153 0
25 * 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
26 BD+01 2916 Pe* 14 21 45.2614710696 +00 46 59.173056516   10.93 9.65     KIIvw 98 0
27 V* V2564 Oph LP? 18 04 40.0713763656 +03 46 44.716990584 9.53 8.59 7.30 6.24 5.43 F6/7V 274 0
28 HD 177808 PM* 19 04 57.8747104152 +31 44 38.655167964 9.01 7.10 5.56     M0III 54 0
29 * alf Vul PM* 19 28 42.3299213429 +24 39 53.661067470 7.77 5.95 4.45 3.24 2.27 M0.5IIIb 194 0
30 HD 184835 * 19 37 03.3413963640 -18 13 51.797161092   6.887 5.642     K0III 26 0
31 * rho Dra PM* 20 02 49.0708468414 +67 52 24.830813366 7.31 5.81 4.50 3.57 2.92 K2+IIICN1Ca1 91 0
32 V* T Cyg AB* 20 47 10.7523451296 +34 22 26.841017100   6.224 4.930 5.33   K3III 79 0
33 * k Aqr LP* 20 47 44.2384708427 -05 01 39.724131922 8.04 6.11 4.44 2.97 1.66 M3III 132 0
34 * 32 Vul V* 20 54 33.6391752552 +28 03 27.445294476 8.28 6.49 5.01     K4III 78 0
35 * 3 Equ * 21 04 34.6516168392 +05 30 10.311674436   7.277 5.585     K5III 41 0
36 * 2 Peg * 21 29 56.8944490492 +23 38 19.825028513   6.088 4.509     M1+III 119 0
37 * nu. Peg PM* 22 05 40.7509642224 +05 03 30.708590796 8.08 6.28 4.84 3.77 3.01 K4III 109 0
38 HD 211073 ** 22 13 52.7275081368 +39 42 53.728839720 7.32 5.88 4.49 3.48 2.74 K2.5III 118 0
39 * alf Tuc SB* 22 18 30.1124372937 -60 15 34.666361094 5.75 4.18 2.82 1.76 1.02 K3III 139 0
40 * g Aqr V* 22 43 35.2332465969 -18 49 49.350293114   6.06 4.69     K3III 60 0
41 HD 216446 PM* 22 47 29.0691534336 +83 09 13.783501260   6.04 4.78     K3III 60 0
42 HD 216143 Pe* 22 50 31.0883724288 -06 54 49.554279360   8.78 7.81 7.44   G2/3(IV)(we) 150 0
43 HD 217382 PM* 22 54 24.9707515824 +84 20 46.231215936   6.112 4.684     K4III 89 0
44 * bet Peg LP* 23 03 46.45746 +28 04 58.0336 6.05 4.09 2.42 0.92 -0.40 M2.5II-III 606 1
45 * 4 And * 23 07 39.2672021448 +46 23 14.030186820   6.702 5.294     K4III 76 0
46 * 66 Peg * 23 23 04.5677946672 +12 18 50.076368928   6.406 5.081 6.62   K3III 81 0
47 * 77 Peg V* 23 43 22.3587666672 +10 19 53.536874160   6.724 5.071     M2III 46 0

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