2025ApJ...995L..21S

Query : 2025ApJ...995L..21S

2025ApJ...995L..21S - Astrophys. J., 995, L21 (2025/December-2)

Evolution of the Lithium-Rotation Correlation in Open Cluster F Dwarfs and a New Age Indicator.

STEINHAUER A. and DELIYANNIS C.P.

Abstract (from CDS):

The Lithium Dip is a severe nonstandard depletion of surface Li in F dwarfs that occurs during the main sequence. We present Li and $v\sin i$ measurements from WIYN/Hydra and CTIO/Hydra spectra of four open clusters whose ages span the range between that of the Pleiades (∼100 Myr), which shows little if any depletion, and that of the Hyades (∼650 Myr), where the dip was first detected. Restricting this study to include only single members for all six clusters plus Praesepe and M48 and using refined membership data such as those from Gaia DR2 lead to the following conclusions. The development of the Li dip is clearly seen. Each cluster shows a correlation between Li and $v\sin i$ with little scatter. The slope of this correlation increases steadily with age, suggesting that the Li depletion and spin-down of these stars are related. This evolution of the lithium-rotation correlation suggests a new method for determining ages of Li-dip stars, which we explore.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Open star clusters - Stellar rotation - Stellar abundances - Stellar processes - Stellar evolution - Stellar ages - Stellar properties

Simbad objects: 60

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Number of rows : 60
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 NGC 188 OpC 00 47 14.8 +85 14 42           ~ 990 0
2 Cl* NGC 1039 IS 115 * 02 41 34.6202810256 +42 45 51.930617544   13.38 12.81     ~ 12 0
3 NGC 1039 234 * 02 41 45.5193256672 +42 49 00.530885281   13.22 12.55     ~ 18 0
4 Cl* NGC 1039 IS 136 Ro* 02 41 47.3933506656 +42 43 38.754393924   13.765 13.151   12.433 ~ 17 0
5 Cl* NGC 1039 IS 142 * 02 41 48.0320184720 +42 39 03.831205572   13.46 12.76     ~ 14 0
6 NGC 1039 265 * 02 41 57.8766451128 +42 48 48.417712020   13.43 12.60 12.61   ~ 17 0
7 NGC 1039 281 * 02 42 05.6499219840 +42 51 02.693517588   13.25 12.44     F7 17 0
8 NGC 1039 287 * 02 42 06.8723479440 +42 47 46.579686540   12.97 12.44 12.35   ~ 20 0
9 Cl* NGC 1039 IS 180 * 02 42 08.1888687648 +42 38 42.056231928   13.66 12.89     ~ 10 0
10 NGC 1039 OpC 02 42 09.1 +42 44 02           ~ 467 0
11 Cl* NGC 1039 IS 188 * 02 42 12.1805642006 +42 58 59.327224197   13.62 12.86     ~ 18 0
12 NGC 1039 367 * 02 42 42.4480159944 +42 40 31.438108992   13.17 12.82     ~ 12 0
13 NGC 1039 377 * 02 42 46.7358995520 +42 43 13.868518224   13.44 12.85 12.72   ~ 14 0
14 Cl* NGC 1039 IS 265 * 02 43 01.5381559536 +42 40 13.589501124   13.43 12.77     ~ 12 0
15 Cl* NGC 1039 IS 283 * 02 43 23.4920662008 +42 55 15.364776972   13.19 12.70     ~ 10 0
16 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
17 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
18 Cl* NGC 2168 CD 145 Ro* 06 08 14.2728228720 +24 27 35.765181972   14.574 13.923 13.681   ~ 13 0
19 NGC 2168 639 Ro* 06 08 25.2669443712 +24 24 31.869691920   14.479 13.805 13.669 13.138 ~ 18 0
20 NGC 2168 461 Ro* 06 08 33.1801586352 +24 24 58.039300440   15.008 14.326 14.169   ~ 19 0
21 NGC 2168 647 Ro* 06 08 33.8382854064 +24 26 24.862170300   14.737 14.064 13.687   ~ 21 0
22 NGC 2168 418 Ro* 06 08 34.2875611656 +24 13 30.450236088   14.632 13.943 13.818 13.171 ~ 18 0
23 NGC 2168 273 * 06 08 38.1544290400 +24 22 13.855313198   14.76 14.068 13.663 13.315 ~ 23 0
24 NGC 2168 250 Ro* 06 08 41.2461329376 +24 15 46.609844292   14.747 14.096 13.803 13.285 ~ 19 0
25 NGC 2168 112 * 06 08 47.9084821776 +24 20 10.891541724   14.478 13.815 13.610 13.033 ~ 19 0
26 NGC 2168 118 Ro* 06 08 50.2950483336 +24 21 27.957740760   14.85 14.174   13.322 ~ 19 0
27 NGC 2168 482 * 06 08 55.9049640312 +24 28 35.984390700   14.337 13.716   12.980 ~ 16 0
28 Cl* NGC 2168 BSB 5058 Ro* 06 09 00.1704354744 +24 10 00.550837164   14.85 14.14 13.91 13.364 ~ 18 0
29 Cl* NGC 2168 BSB 5063 Ro* 06 09 06.0213420456 +24 31 55.682665464   14.953 14.196 14.059 13.423 ~ 15 0
30 NGC 2168 OpC 06 09 07.5 +24 20 15           ~ 604 0
31 NGC 2168 385 Ro* 06 09 12.3262632096 +24 11 32.399595168   14.675 14.002 13.860 13.246 ~ 20 0
32 NGC 2168 187 Ro* 06 09 21.6999178200 +24 17 04.086996072   15.101 14.264 14.017 13.422 F5 20 0
33 NGC 2168 183 * 06 09 26.4883249320 +24 14 59.330504616   14.573 13.926   13.148 ~ 18 0
34 NGC 2168 360 * 06 09 32.4517901616 +24 13 12.486606636   14.592 13.954   13.174 ~ 18 0
35 NGC 2168 524 Ro* 06 09 34.7782110690 +24 22 16.496402429   14.567 13.869 13.735 13.153 F5 23 0
36 Cl* NGC 2168 CD 624 * 06 09 42.6141805392 +24 31 00.536395116   14.64 14     ~ 14 0
37 Cl* NGC 2168 CD 647 Ro* 06 09 46.6290716856 +24 22 14.265258744   14.737 14.020 13.966   ~ 14 0
38 NGC 2548 OpC 08 13 34.0 -05 43 11           ~ 227 0
39 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
40 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
41 NAME HYA SUPERCL SCG 08 57.9 +03 10           ~ 204 0
42 Cl* NGC 3532 FERN 277 * 11 04 13.8972471504 -58 45 52.240995900   13.274 12.733 12.402 12.090 ~ 22 0
43 Cl* NGC 3532 FERN 153 * 11 04 37.0895775504 -58 41 14.530449156   13.233 12.688 12.370 12.069 ~ 19 0
44 Cl* NGC 3532 FERN 176 * 11 04 39.5628352632 -58 49 39.306787464   12.803 12.307 12.022 11.751 ~ 20 0
45 Cl* NGC 3532 FERN 173 * 11 04 44.6788606320 -58 49 41.224198692   12.780 12.266 11.997 11.724 ~ 21 0
46 Cl* NGC 3532 FERN 145 * 11 04 46.5866212320 -58 40 36.592972716   12.41 11.98 11.93   ~ 19 0
47 Cl* NGC 3532 FERN 26 * 11 05 32.3405902944 -58 41 19.171951188   13.044 12.527 12.202 11.922 ~ 21 0
48 Cl* NGC 3532 FERN 188 * 11 05 33.2828279736 -58 51 06.140846556   12.645 12.173 11.900 11.620 ~ 20 0
49 NGC 3532 OpC 11 05 33.9 -58 42 13           ~ 414 0
50 Cl* NGC 3532 FERN 128 * 11 05 34.0255330368 -58 39 09.386903232   12.91 12.42     ~ 21 0
51 Cl* NGC 3532 FERN 119 * 11 05 42.6038844000 -58 37 53.726884716   12.698 12.221 11.942 11.618 ~ 20 0
52 Cl* NGC 3532 FERN 15 * 11 05 50.4208200600 -58 44 43.736367372   13.209 12.654 12.306 12.018 ~ 19 0
53 Cl* NGC 3532 FERN 11 * 11 05 51.6002620920 -58 46 52.613873400   12.848 12.350 12.056 11.781 ~ 21 0
54 Cl* NGC 3532 FERN 78 * 11 06 22.4240986992 -58 49 51.677610276           ~ 22 0
55 Cl* NGC 3532 FERN 214 * 11 06 29.0440073928 -58 45 01.489076316   12.693 12.178 11.872 11.564 ~ 16 0
56 NGC 7092 42 * 21 30 54.1072062648 +48 25 37.511878368   11.69 11.20     F8V 27 0
57 NGC 7092 OpC 21 31 04.0 +48 17 47           ~ 245 0
58 Cl* NGC 7092 AK 1385 * 21 32 27.4147261416 +49 10 51.840277824   11.93 11.43     F7IV 19 0
59 Cl* NGC 7092 MS 1394 * 21 33 46.2160614072 +48 31 07.893657012   12.12 11.59     F5: 20 0
60 Cl* NGC 7092 MS 1728 * 21 35 14.7758334240 +48 19 02.151444612   11.68 11.21     F6: 20 0

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