1999A&A...342..831J


Query : 1999A&A...342..831J

1999A&A...342..831J - Astronomy and Astrophysics, volume 342, 831-838 (1999/2-3)

Late-type giants with infrared excess. I. Lithium abundances.

JASNIEWICZ G., PARTHASARATHY M., DE LAVERNY P. and THEVENIN F.

Abstract (from CDS):

de la Reza et al. (1997ApJ...482L..77D) suggested that all K giants become Li-rich for a short time. During this period the giants are associated with an expanding thin circumstellar shell supposedly triggered by an abrupt internal mixing mechanism resulting in the surface Li enrichment. In order to test this hypothesis twenty nine late-type giants with far-infrared excess from the list of Zuckerman et al. (1995ApJ...446L..79Z) were observed in the Li-region to study the connection between the circumstellar shells and Li abundance. Eight giants have been found to have log ε(Li)>1.0. In the remaining giants the Li abundance is found to be much lower. HD 219025 is found to be a rapidly rotating (projected rotational velocity of 23±3km/s), dusty and Li-rich (logε(Li)=3.0±0.2)K giant. Absolute magnitude derived from the Hipparcos parallax reveals that it is a giant and not a pre-main-sequence star. The evolutionary status of HD 219025 seems to be similar to that of HDE 233517 which is also a rapidly rotating, dusty and Li-rich K giant. The Hipparcos parallaxes of all the well studied Li-rich K giants show that most of them are brighter than the "clump" giants. Their position in the H-R diagram indicates that they have gone through mixing and the initial abundance of Li is not preserved. There seems to be no correlations between Li abundances, rotational velocities and carbon isotope ratios. The only satisfactory explanation for the overabundance of lithium in these giants is the creation of Li by the extra deep mixing and the associated "cool bottom processing".

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: circumstellar matter - stars: evolution - stars: individual: HD 219025 - stars: late-type - infrared: stars

Simbad objects: 46

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Number of rows : 46
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HD 787 PM* 00 12 09.9845643792 -17 56 17.702925108   6.740 5.265     K4III 91 0
2 V* OP And RS* 01 36 27.2005869192 +48 43 22.000439676   7.47 6.22     K1III: 97 0
3 HD 19745 TT* 03 07 03.2479728720 -65 26 56.811398748   10.16 9.10     K1III 37 0
4 HD 27497 * 04 20 41.2483660224 +06 07 50.850394680   6.685 5.751     G8III-IV 40 0
5 * 2 Aur * 04 52 37.9803457176 +36 42 11.477114460   6.164 4.779     K3-IIIBa0.4 137 0
6 * 99 Tau * 04 57 48.6456469296 +23 56 54.846669516   6.903 5.806     K0III 33 1
7 HD 34043 V* 05 14 44.0491051584 +05 09 22.128314616   6.853 5.494     K4III 47 0
8 HD 34810 * 05 20 56.6146886760 +19 48 51.639960132   7.428 6.205     K0III 25 0
9 HD 39853 RG* 05 54 43.6305696648 -11 46 27.098071500   7.148 5.613     K4III 110 0
10 HD 40827 * 06 05 08.2302835584 +59 23 35.569403448   7.442 6.321     K0+IIICN1- 32 0
11 HD 43827 V* 06 17 41.7240354840 -16 48 57.271233024   6.421 5.148     K1III 38 0
12 * 66 Aur * 07 24 08.4675588912 +40 40 20.599881492   6.434 5.188     K0.5IIIa 99 0
13 HD 233517 * 08 22 46.7147840400 +53 04 49.230337440   10.85 9.71     K2 85 0
14 HD 80989 * 09 22 36.4203574224 -15 32 51.612943560   10.40 9.10     K1/2III 7 0
15 HD 92253 PM* 10 35 53.8790733144 -75 47 35.395761012   8.65 7.45     K0III 13 0
16 HD 94363 SB* 10 53 24.9586881966 -02 15 18.610317119   7.043 6.117     G8III 66 0
17 HD 95799 * 11 02 25.1094103728 -58 45 37.378955412   8.960 7.978 7.395 6.906 G8III 31 0
18 NGC 3532 OpC 11 05 40 -58 42.4           ~ 298 0
19 HD 108471 * 12 27 42.0816469128 +08 36 37.237288644   7.293 6.342     G8III 43 0
20 HD 112127 C* 12 53 55.7452187592 +26 46 47.982961020 9.56 8.14 6.88 5.97 5.39 C-R4IIIb 146 0
21 HD 111830 * 12 54 09.6073181304 -78 02 13.458120036   9.05 7.79     K0III 20 0
22 HD 118344 PM* 13 38 45.7158662640 -70 26 41.392592772   7.527 6.097     K3III 20 0
23 HD 120602 * 13 50 24.6787096752 +05 29 49.996860540   6.892 5.993     K0 44 0
24 * 9 Boo PM* 13 56 34.1810272752 +27 29 31.493189040 8.160 6.440 5.000     K3III 97 0
25 * phi Vir PM* 14 28 12.1389021744 -02 13 40.649015856   5.522 4.840     G2IV 182 0
26 * c01 Cen PM* 14 43 39.4396190 -35 10 25.158650   5.40 4.05     K3IIIb 67 0
27 * 36 Lib * 15 34 37.3181759976 -28 02 49.272938232   6.437 5.138     K2/3III 36 0
28 HD 145206 SB* 16 09 50.5038223560 -03 28 00.278812956   6.817 5.378     K4III 63 0
29 HD 146850 * 16 19 00.4164100704 -14 52 22.130310180 9.41 7.46 5.94     K3IIICNVp 41 0
30 HD 146834 * 16 19 07.7218657704 -20 13 05.046059712   7.353 6.298     K0III 42 1
31 HD 148293 * 16 21 48.7107861744 +69 06 33.814560060   6.376 5.264     K2III 73 0
32 * zet Ara * 16 58 37.2121689 -55 59 24.520302   4.701 3.076     K3III 95 0
33 * 30 Oph PM* 17 01 03.6017776608 -04 13 21.517847868   6.302 4.812     K4III 81 0
34 * kap Ara * 17 26 00.0431284872 -50 38 00.623818572   6.236 5.193     G8III 75 0
35 HD 169689 EB* 18 25 38.7990783216 +08 01 55.225743564   6.545 5.665     G9II+B9V 102 0
36 * 113 Her SB* 18 54 44.8849895400 +22 38 42.271489464 5.88 5.38 4.60 3.96 3.50 G8III+:+A0.5 92 0
37 HD 176884 * 19 03 03.8052494136 -19 14 44.460596724   7.26 6.00     K0II/III 20 0
38 HD 183492 PM* 19 29 22.1540342928 +14 35 45.669109020   6.618 5.564     K0III 61 0
39 HD 183526 * 19 31 06.5785280688 -28 55 49.007217756   11.68 9.94     K3(III) 5 0
40 * 62 Aql RG* 20 04 23.1507841680 -00 42 33.510584628 8.33 6.98 5.68     K3III 40 0
41 HD 204540 * 21 28 42.2734938240 +25 55 16.843457892   7.858 6.553     K2III 16 0
42 HD 205349 V* 21 33 17.8846699368 +45 51 14.454491328   8.010 6.209     K4Ib 66 0
43 HD 212320 * 22 23 32.1500037504 -07 11 39.884201448   6.913 5.907     G8Ib/II(w) 63 0
44 * 5 Psc PM* 23 08 40.9095327701 +02 07 40.355833093       4.9   G6IIIb 88 0
45 V* BI Ind RS* 23 13 52.7842528944 -68 17 28.814107128   8.89 7.67     K2IIIp 39 0
46 HD 221776 * 23 34 46.7420483784 +38 01 26.404837788   7.766 6.173     K5III 23 0

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2022.05.24-08:41:46

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