2012A&A...537A..91X


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.12CET12:10:58

2012A&A...537A..91X - Astronomy and Astrophysics, volume 537A, 91-91 (2012/1-1)

Lithium abundances of nearby young solar-type stars based on optical high-resolution spectroscopy.

XING L.-F. and XING Q.-F.

Abstract (from CDS):

Lithium has long been recognized as a powerful tool for investigating the internal mixing of low-mass stars. In addition, accurate measurements of lithium abundances in young solar-type stars provide independent and reliable age diagnostics. To study the relationship between lithium and activity in normal solar type-type stars and determine the effectiveness of lithium and kinematics as activity indicators, we perform a lithium survey of nearby late-type stars. We search for nearby young solar-type stars and investigate the relationship between lithium abundances and X-ray activity by measuring logLx. On the basis of high-resolution spectroscopic observations, we derived the lithium abundances of 33 young solar-type stars by comparing the measured LiI λ 670.8nm equivalent widths with the curve of growth calculations in non-LTE (NLTE) conditions. We obtain the lithium abundances of a sample of young solar-type stars. Using the lithium abundance and X-ray luminosity, Lx, we investigate the relationship between Li abundance and X-ray activity. We find a clear correlation between lithium abundance (logN(Li)) and X-ray luminosity, logLx, for our sample stars. As the X-ray luminosity, Lx, becomes stronger, the lithium abundance decreases in our sample (11 pre-main-sequence, 15 zero-age-main-sequence, and 7 young main-sequence) stars. The results imply that there is a large number of solar-type stars. A correlation appears to exist between Li abundance and age, thus confirming the presence of very active young stars close to the Sun.

Abstract Copyright:

Journal keyword(s): stars: evolution - stars: abundances - stars: solar-type

Simbad objects: 39

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Number of rows : 39

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 BD+61 119 PM* 00 34 38.3080813437 +62 37 19.628097276   9.53 8.98     F8 15 0
2 TYC 626-166-1 Ro* 01 56 27.5950247899 +12 24 49.058801180   11.12 10.620   9.700 G 9 0
3 BD+30 397 BY* 02 27 29.2541412466 +30 58 24.594383708   11.3 10.12 9.32 8.78 K7V 78 1
4 HD 17662 PM* 02 50 30.1779381308 +11 52 12.354194689   9.22 8.44     G5 19 0
5 V* V686 Per BY* 03 20 59.4526690057 +33 13 05.973368496       7.5   K0V 29 1
6 HD 21051 TT* 03 24 10.1285042920 +12 37 46.530455768   7.246 6.046     K0III-IV 43 0
7 Cl Melotte 20 OpC 03 26 42 +48 48.0           ~ 743 0
8 HD 21845 BY* 03 33 13.4903859633 +46 15 26.544579583   8.963 8.250 7.8 7.34 K2 74 0
9 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2916 0
10 HD 232862 ** 03 57 19.967736 +50 51 18.56412   10.47 9.58 9.36   K2V 25 0
11 HD 26913 BY* 04 15 25.7871510436 +06 11 58.749263209 7.790 7.580 6.920 6.554 6.195 G8V 194 0
12 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2588 0
13 V* V1319 Tau Ce* 04 30 49.1857617546 +21 14 10.653917973   11.07 10.24 9.82 9.465 G8 31 0
14 HD 285840 TT* 04 32 42.4331106365 +18 55 10.201423727   11.52 10.848   9.711 K1V: 38 0
15 V* V1110 Tau RS* 04 34 39.2794263037 +25 01 01.019264184   11.14 10.308   9.141 G0 54 0
16 HD 31281 TT* 04 55 09.6199989907 +18 26 31.099026218   9.83 9.14 9.12   G1V: 31 0
17 HD 32704 Ro* 05 04 57.5421341705 -03 54 52.801545649   9.41 8.539   7.566 G6IV 11 0
18 HD 287927 TT* 05 30 48.0169964255 +02 59 34.612706574   11.44 10.703   9.765 F2 11 0
19 HD 245924 TT* 05 39 30.932 +23 06 33.36     9.580   8.482 K0IV 12 0
20 HD 251108 Ro* 06 04 14.9931400817 +12 45 51.087544762   11.25 9.899   8.520 K2 4 0
21 ** DYR 1 ** 08 08 56.39 +32 49 11.4           ~ 11 0
22 IC 2391 OpC 08 40 32 -53 02.0           ~ 705 0
23 HD 79551 PM* 09 16 18.2009750841 +44 55 26.091469089       8.4   G5 17 0
24 HD 81025 ** 09 24 55.67898 +51 34 26.0255   7.142 6.368     G2III 41 0
25 * d UMa RS* 09 34 28.8617537809 +69 49 49.226466640 5.67 5.34 4.57 3.91 3.50 G5III-IV 277 0
26 IC 2602 OpC 10 42 58 -64 24.0           ~ 541 0
27 V* GZ Leo RS* 11 02 02.2678843738 +22 35 45.489905179   9.82 8.880   7.910 K0Ve+K0Ve 39 0
28 BD+12 2343 SB* 11 32 49.4244668596 +12 10 24.939551497   10.13 9.38     G5 17 0
29 * 61 UMa PM* 11 41 03.0159358291 +34 12 05.882438337 6.31 6.08 5.34 4.73 4.38 G8V 561 0
30 HD 111395 BY* 12 48 47.0482457374 +24 50 24.820252955   6.98   5.8   G5V 163 0
31 V* RS CVn Al* 13 10 36.9078781154 +35 56 05.587686902 8.57 8.51 7.93 7.7   F6IV+G8IV 679 0
32 BD+23 2581 ** 13 32 41.6858519142 +22 30 06.809284189   10.65 9.622 9.0 8.381 KV:e 29 0
33 * phi Vir PM* 14 28 12.1387305861 -02 13 40.648944384   5.522 4.840     G2IV 171 0
34 * i Boo WU* 15 03 47.29565 +47 39 14.6228   5.41 4.76     G0Vn 522 0
35 * lam Ser PM* 15 46 26.6144291449 +07 21 11.041647444 5.13 5.03 4.42 3.92 3.60 G0-V 528 0
36 V* BY Dra BY* 18 33 55.7719224141 +51 43 08.903033617 10.22 9.23   8.733   K4Ve+K7.5Ve 592 0
37 HD 340540 Ro* 20 35 56.5723733721 +27 42 40.185476344   10.09 9.08     K0 7 0
38 V* V383 Lac BY* 22 20 07.0254836275 +49 30 11.763794475   9.42 8.58     K1V 70 0
39 BD+66 1664 SB* 23 58 10.6721723643 +67 33 59.714339320   9.42 8.73     G5 13 0

    Equat.    Gal    SGal    Ecl

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2019.12.12-12:10:58

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