2009A&A...508..677A


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.21CEST19:50:06

2009A&A...508..677A - Astronomy and Astrophysics, volume 508, 677-693 (2009/12-3)

Spectroscopic properties of cool Ursa Major group members.

AMMLER-VON EIFF M. and GUENTHER E.W.

Abstract (from CDS):

Until now, most members of the Ursa Major (UMa) group of stars have been identified by means of kinematic criteria. However, in many cases kinematic criteria alone are insufficient to ascertain, whether an individual star is really a member of this group. Since photometric criteria are ineffective in the case of cool dwarf members, one must use spectroscopic criteria. Nevertheless, resulting membership criteria are inconclusive. We reanalyse spectroscopic properties of cool UMa group dwarfs. In particular, we study the distribution of iron abundance, the strength of the LiI absorption at 6708Å and the Li abundance, and the infilling of the core of the Hα line. Twenty-five cool and northern bona-fide members are carefully selected from the literature. Homogeneously measured stellar parameters and iron abundances are given for all Sun-like stars selected, based on spectra of high resolution and high signal-to-noise ratio. In addition, we measure the Li equivalent width and abundance as well as the relative intensity of the Hα core and the corresponding chromospheric flux. The studied stars infer an average Ursa Major group iron abundance of -0.03±0.05dex, which is higher by about 0.06dex than determined elsewhere. The Li abundance derived of Ursa Major group dwarf stars is higher than in the Hyades at effective temperatures cooler than the Sun, but lower than in the younger Pleiades, a result which is independent of the exact value of the effective temperature adopted. The Sun-like and cooler dwarfs also display chromospheric infilling of the Hα core. We present spectroscopic criteria that may be used to exclude non-members.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: fundamental parameters - open clusters and associations: individual: Ursa Major group - solar neighborhood

Simbad objects: 36

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Number of rows : 36

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* EZ Cet BY* 01 49 23.3505045594 -10 42 13.019336799 7.49 7.386 6.754 6.392 6.04 G3V 154 0
2 * chi Cet PM* 01 49 35.1031601 -10 41 11.067376 5.04 5.00 4.68 4.38 4.22 F0V 184 0
3 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 3074 0
4 HD 24916 Er* 03 57 28.6989213844 -01 09 34.071545156 10.224 9.166 8.014 7.336 6.724 K4V 128 0
5 HD 26913 BY* 04 15 25.7871510436 +06 11 58.749263209 7.790 7.580 6.920 6.554 6.195 G8V 204 0
6 HD 26923 Ro* 04 15 28.8004956278 +06 11 12.699896698 6.910 6.860   5.9   G0IV 192 0
7 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2753 0
8 V* MS Cam BY* 04 33 54.2421848388 +64 38 00.290832693   8.533 7.755     ~ 61 0
9 * gam Lep PM* 05 44 27.7908940 -22 26 54.180763 4.08 4.07 3.60 3.15 2.89 F6V 401 0
10 * chi01 Ori RS* 05 54 22.9829893 +20 16 34.222038 5.08 5.00 4.40 3.90 3.59 G0V 810 0
11 V* V1386 Ori Ro* 06 06 40.4779729363 +15 32 31.579218639 8.016 7.565   6.2   K0V 151 0
12 HD 59747 BY* 07 33 00.5803322465 +37 01 47.450630754   8.58 7.70     G5V 87 0
13 HD 71974 ** 08 31 35.02027 +34 57 58.4091           G5V 70 0
14 NAME UMa Region reg 11 00 +50.0           ~ 318 0
15 V* DS Leo BY* 11 02 38.3419263291 +21 58 01.704479733 12.246 11.049 9.572 8.638 7.634 M1.0V 185 0
16 HD 238087 PM* 12 12 05.2240712876 +58 55 35.012209320   11.4 10.021 9.633   K5V 48 0
17 V* NO UMa RS* 12 31 18.9199808163 +55 07 08.286582630   9.04 8.10     K2Ve 123 0
18 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 392 2
19 V* DO CVn BY* 12 35 51.2878234258 +51 13 17.312165454   9.50 8.54     K0 46 0
20 HD 110463 BY* 12 41 44.5224610977 +55 43 28.823352008   9.250 8.265     K3V 103 0
21 HD 111456 ** 12 48 39.4470003426 +60 19 11.037876361   6.299 5.831     F6V 196 1
22 HD 112196 ** 12 54 40.0155993810 +22 06 28.557894799   7.54 7.00     F8V+M2V-M3V 61 0
23 HD 115043 PM* 13 13 37.0081498408 +56 42 29.762950141   7.423 6.813     G1Va 243 0
24 HD 238224 ** 13 23 23.2723798719 +57 54 21.821728551   10.91 9.560 9.355   K5V 57 0
25 * c Boo PM* 15 07 18.0658711040 +24 52 09.095241798 5.34 5.36 4.93 4.53 4.32 F5V 343 0
26 NAME Ursa Major Cluster ClG 15 08.8 +67 07           ~ 389 0
27 HD 147513 PM* 16 24 01.2905970257 -39 11 34.734611237 6.17 6.02 5.376     G5V 317 1
28 * 56 Her * 16 55 02.1610933564 +25 43 50.451250113   6.993 6.064     G5III 50 0
29 HD 155674 PM* 17 10 10.5075538902 +54 29 39.755942558   10.061 8.853     K6V 81 0
30 BD+54 1862 PM* 17 10 12.3554906709 +54 29 24.509723102   10.536 9.209 8.71   K6V 71 0
31 HD 167389 PM* 18 13 07.2257142711 +41 28 31.311389409   7.96 7.39     F8V: 67 0
32 HD 171746 ** 18 35 53.22139 +16 58 32.5112   8.83 8.61 7.12   F8V 114 0
33 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2541 0
34 HD 184960 PM* 19 34 19.7897154364 +51 14 11.827779462   6.21   5.4   F7V 144 0
35 * rho Cyg PM* 21 33 58.8529848 +45 35 30.617851 5.47 4.91 4.02 3.31 2.81 G8IIIFe-0.5 185 0
36 HD 217813 BY* 23 03 04.9774272436 +20 55 06.862793297 7.364 7.249 6.616 6.279 5.948 G1V 104 0

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2021.04.21-19:50:06

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