2001A&A...379..976M


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.09CEST20:34:08

2001A&A...379..976M - Astronomy and Astrophysics, volume 379, 976-991 (2001/12-1)

Chromospheric activity, lithium and radial velocities of single late-type stars possible members of young moving groups'.

MONTES D., LOPEZ-SANTIAGO J., FERNANDEZ-FIGUEROA M.J. and GALVEZ M.C.

Abstract (from CDS):

We present here high resolution echelle spectra taken during three observing runs of 14 single late-type stars identified in our previous studies (Montes et al. 2001, MNRAS, in press, hereafter Paper I) as possible members of different young stellar kinematic groups (Local Association (20-150Myr), Ursa Major group (300Myr), Hyades supercluster (600Myr), and IC 2391 supercluster (35Myr)). Radial velocities have been determined by cross correlation with radial velocity standard stars and used together with precise measurements of proper motions and parallaxes taken from Hipparcos and Tycho-2 Catalogues, to calculate Galactic space motions (U, V, W) and to apply Eggen's kinematic criteria. The chromospheric activity level of these stars have been analysed using the information provided for several optical spectroscopic features (from the Ca II H & K to Ca II IRT lines) that are formed at different heights in the chromosphere. The Li I λ6707.8Å line equivalent width (EW) has been determined and compared in the EW(Li I) versus spectral type diagram with the EW(Li I) of stars members of well-known young open clusters of different ages, in order to obtain an age estimation. All these data allow us to analyse in more detail the membership of these stars in the different young stellar kinematic groups. Using both, kinematic and spectroscopic criteria we have confirmed PW And, V368 Cep, V383 Lac, EP Eri, DX Leo, HD 77407, and EK Dra as members of the Local Association and V834 Tau, π1 UMa, and GJ 503.2 as members of the Ursa Major group. A clear rotation-activity dependence has been found in these stars.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: chromospheres - stars: late-type - stars: abundances - stars: kinematics - galaxy: open clusters and associations: general

VizieR on-line data: <Available at CDS (J/A+A/379/976): stars.dat table1.dat table4.dat table5.dat>

Status at CDS:  

Simbad objects: 32

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Number of rows : 32

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* PW And RS* 00 18 20.8896176716 +30 57 22.127515298   9.78 8.86 8.3 7.78 K2V 106 1
2 * 54 Psc PM* 00 39 21.8055114029 +21 15 01.716052732 7.29 6.71 5.88 5.21 4.82 K0.5V 520 1
3 HD 4628 PM* 00 48 22.9763438736 +05 16 50.209562003 7.22 6.64 5.74 4.99 4.52 K2.5V 442 0
4 * 107 Psc PM* 01 42 29.7634932653 +20 16 06.660242064 6.57 6.08 5.24 4.55 4.12 K1V 498 0
5 HD 17925 RS* 02 52 32.1281853696 -12 46 10.970649463 7.48 6.91 6.05 5.34 4.89 K1V 467 0
6 HD 29697 BY* 04 41 18.8553438360 +20 54 05.447950758 10.064 9.12 7.985 7.313 6.666 K4V 149 0
7 HD 37394 BY* 05 41 20.3357283721 +53 28 51.810629854 7.58 7.07 6.23 5.54 5.11 K1 295 0
8 * bet Gem PM* 07 45 18.94987 +28 01 34.3160 3.00 2.14 1.14 0.39 -0.11 K0IIIb 1042 1
9 V* pi.01 UMa BY* 08 39 11.7043265307 +65 01 15.268273190 6.33 6.26 5.64 5.12 4.79 G0.5V 515 0
10 IC 2391 OpC 08 40 32 -53 02.0           ~ 710 0
11 HD 77407 ** 09 03 27.0836286593 +37 50 27.500788701       6.7   G0V+M3V-M6V 88 0
12 V* LQ Hya BY* 09 32 25.5684079124 -11 11 04.687410738 9.316 8.761 7.891 7.288 6.815 K1Vp 398 0
13 HD 82443 BY* 09 32 43.7594363452 +26 59 18.708212270   7.78   6.6   G9V(k) 218 1
14 HD 105631 PM* 12 09 37.2563471150 +40 15 07.404577561   8.26   7.0   G7V 108 0
15 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 374 2
16 HD 115043 PM* 13 13 37.0081498408 +56 42 29.762950141   7.423 6.813     G1Va 235 0
17 V* EK Dra BY* 14 39 00.2109485496 +64 17 29.977371998   8.243 7.604     G1.5V 373 0
18 HD 134319 BY* 15 05 49.9042264447 +64 02 49.941455806   9.05 8.41 8.0   G5V: 110 0
19 HD 151877 PM* 16 48 35.5142297507 +37 00 48.121729168   9.22   7.9   K1 78 0
20 HD 159222 PM* 17 32 00.9922730198 +34 16 16.130879367 7.38 7.21   6.1   G1V 199 0
21 * bet Oph PM* 17 43 28.3526482 +04 34 02.295484 5.150 3.930 2.750 1.96 1.38 K2IIICN0.5 451 0
22 HD 166620 PM* 18 09 37.4162810870 +38 27 27.995921559 7.86 7.27 6.40 5.63 5.14 K2V 387 0
23 HD 182488 PM* 19 23 34.0133626629 +33 13 19.074920892       5.8   K0V 242 1
24 * eps Cyg ** 20 46 12.6823609 +33 58 12.924926 4.370 3.520 2.480 1.73 1.19 K0III 480 1
25 * 61 Cyg B Fl* 21 06 55.2640651855 +38 44 31.362140913 8.63 7.40 6.03 4.86 3.55 K7V 665 1
26 HD 201196 PM* 21 07 33.6435638937 +15 39 31.155193430 8.070 7.290 6.260     K2IV 18 0
27 V* V383 Lac BY* 22 20 07.0254836275 +49 30 11.763794475   9.42 8.58     K1V 70 0
28 HD 219134 Fl* 23 13 16.9747821012 +57 10 06.076520993 7.460 6.560 5.570 4.76 4.23 K3V 510 1
29 HD 220140 RS* 23 19 26.6384866318 +79 00 12.671002116   8.43 7.54 7.17 6.76 G9V 126 1
30 NAME Hyades Moving Group MGr ~ ~           ~ 235 0
31 NAME Castor Moving Group As* ~ ~           ~ 114 1
32 NAME Pleiades Moving Group MGr ~ ~           ~ 233 1

    Equat.    Gal    SGal    Ecl

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2020.04.09-20:34:08

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