2001ApJ...563..334S

Query : 2001ApJ...563..334S

2001ApJ...563..334S - Astrophys. J., 563, 334-340 (2001/December-2)

Rotational studies of late-type stars. VII. M34 (NGC 1039) and the evolution of angular momentum and activity in young solar-type stars.

SODERBLOM D.R., JONES B.F. and FISCHER D.

Abstract (from CDS):

We analyze Keck High Resolution Echelle Spectrometer (HIRES) observations of rotation and activity in F, G, and K dwarf members of the open cluster M34 (NGC 1039), which is 250 Myr old, and we compare them to the Pleiades, Hyades, and NGC 6475. The upper bound to rotation seen in M34 is about a factor of 2 lower than for the 100 Myr old Pleiades, but most M34 stars are well below this upper bound, and it is the overall convergence in rotation rates that is most striking. A few K dwarfs in M34 are still rapid rotators, suggesting that they have undergone core-envelope decoupling, followed by replenishment of surface angular momentum from an internal reservoir. Our comparison of rotation in these clusters indicates that the timescale for the coupling of the envelope to the core must be close to 100 Myr if decoupling does, in fact, occur.

Abstract Copyright: ∼

Journal keyword(s): open clusters and associations: individual (M34, NGC 1039) - Stars: Evolution - Stars: Late-Type - Stars: Rotation

CDS comments: Table 1 : stars JP are Cl* NGC 1039 JP NNNa

Simbad objects: 54

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Number of rows : 54
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 BD+42 571 * 02 40 49.4226176198 +42 42 54.624750773   12.31 12.04     F8 23 0
2 Cl* NGC 1039 JP 42 * 02 41 01.8849779856 +42 42 31.694439456   16.12 15.10     ~ 15 0
3 NGC 1039 161 * 02 41 05.2329047526 +42 52 38.395647989   12.36 11.94     F6 23 0
4 Cl* NGC 1039 JP 113 Ro* 02 41 23.0988189432 +42 40 16.059764820   15.925 14.960   13.902 ~ 14 0
5 Cl* NGC 1039 JP 133 Ro* 02 41 28.1443975128 +42 38 37.137600708   14.384 13.662   12.857 ~ 23 0
6 V* V797 Per BY* 02 41 35.2538631341 +42 41 02.494183444   15.406 14.546   13.552 ~ 15 0
7 Cl* NGC 1039 JP 172 Ro* 02 41 37.5600483576 +42 57 21.635980560   16.780 15.664   14.427 ~ 13 0
8 Cl* NGC 1039 JP 194 * 02 41 41.9212937064 +42 57 57.002899608   16.91 15.64     ~ 6 0
9 V* V804 Per BY* 02 41 44.1758166888 +42 46 07.593994704   15.366 14.483   13.542 ~ 22 0
10 Cl* NGC 1039 IS 133 * 02 41 45.9380504808 +42 42 50.093514540   13.70 12.96     ~ 19 0
11 Cl* NGC 1039 IS 136 Ro* 02 41 47.3933506656 +42 43 38.754393924   13.765 13.151   12.433 ~ 17 0
12 Cl* NGC 1039 JP 224 Ro* 02 41 49.3599304464 +42 36 37.550755584   15.285 14.410   13.451 ~ 14 0
13 Cl* NGC 1039 JP 227 Ro* 02 41 49.9378524528 +42 37 13.869839064   15.203 14.366   13.454 ~ 14 0
14 V* V809 Per BY* 02 41 50.3097244224 +42 44 37.616139528   17.259 16.025   14.652 ~ 16 0
15 NGC 1039 253 * 02 41 52.2694586328 +42 44 37.527686412   12.69 12.21     G0 20 0
16 Cl* NGC 1039 JP 265 Ro* 02 41 57.4732127038 +43 00 26.509711996   16.564 15.503   14.241 ~ 9 0
17 V* V820 Per BY* 02 41 57.9192864504 +42 53 22.437606120   17.16 16.00     ~ 7 0
18 V* V822 Per BY* 02 42 02.2546215312 +43 01 13.416962268   15.95 14.89     ~ 6 0
19 V* V823 Per BY* 02 42 02.5516869189 +42 51 51.559425565   16.253 15.236   14.118 ~ 21 0
20 Cl* NGC 1039 IS 173 * 02 42 05.3450498808 +42 40 55.178023404   15.76 14.66     ~ 10 0
21 Cl* NGC 1039 JP 298 * 02 42 05.7784446840 +42 46 53.673757392   15.52 14.51     ~ 20 0
22 NGC 1039 287 * 02 42 06.8723479440 +42 47 46.579686540   12.97 12.44 12.35   ~ 20 0
23 NGC 1039 OpC 02 42 09.1 +42 44 02           ~ 467 0
24 Cl* NGC 1039 IS 184 * 02 42 09.3811194336 +42 42 05.520080484   14.19 13.33     ~ 7 0
25 NGC 1039 299 * 02 42 10.9748580936 +42 30 37.008146196   12.604 12.137 12.053   F5 22 0
26 Cl* NGC 1039 IS 188 * 02 42 12.1805642006 +42 58 59.327224197   13.62 12.86     ~ 18 0
27 V* V837 Per BY* 02 42 17.2368045024 +42 48 18.652306824   17.02 15.86     ~ 15 0
28 Cl* NGC 1039 JP 366 * 02 42 19.2232711192 +42 30 04.400146989   14.45 13.72     ~ 22 0
29 V* V840 Per BY* 02 42 21.8936282784 +42 32 13.047707004   15.07 14.13     ~ 15 0
30 Cl* NGC 1039 JP 392 * 02 42 25.6168345704 +42 41 08.842438608   16.5 15.49     ~ 14 0
31 Cl* NGC 1039 JP 397 * 02 42 26.3156245560 +42 30 13.524163884   15.64 14.74     ~ 14 0
32 NGC 1039 340 * 02 42 27.700 +42 46 16.28   12.80 12.29     ~ 9 0
33 Cl* NGC 1039 JP 415 * 02 42 30.1953723968 +42 40 46.165431334   14.9 14.12     ~ 21 0
34 V* V846 Per BY* 02 42 31.5394551744 +42 37 10.527987612   17.01 15.93     ~ 14 0
35 V* V847 Per BY* 02 42 32.2848031100 +42 49 05.945042396   16.1 15.02     ~ 20 0
36 NGC 1039 360 * 02 42 37.8755476728 +42 42 49.209281280   12.96 12.39     F0 11 0
37 Cl* NGC 1039 JP 482 * 02 42 45.4617455573 +42 52 05.593489913   16.47 15.36     ~ 16 0
38 NGC 1039 375 SB* 02 42 45.8068691520 +42 34 22.182534804   12.818 12.272 12.169   F7 20 0
39 V* V862 Per BY* 02 42 47.7364744632 +42 47 42.939620160   15.95 15.00     ~ 22 0
40 NGC 1039 384 * 02 42 51.3832574328 +42 43 28.716688164   12.04 11.77     F1 21 0
41 Cl* NGC 1039 IS 252 * 02 42 54.6231687453 +42 41 10.750119048   13.67 13.03     ~ 20 0
42 Cl* NGC 1039 JP 516 * 02 42 55.0836110736 +42 45 50.498597124   17.04 15.98     ~ 14 0
43 V* V870 Per BY* 02 42 59.9525908032 +42 58 01.516181844   16.67 15.67     ~ 10 0
44 NGC 1039 405 * 02 43 00.6458460192 +42 39 59.025088764   12.15 12.47     F6 19 0
45 Cl* NGC 1039 JP 570 * 02 43 10.2630103944 +42 54 32.950599372   15.69 14.74     ~ 11 0
46 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
47 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
48 NGC 6475 OpC 17 53 44.1 -34 49 36           ~ 413 0
49 Cl* NGC 1039 JP 257b * ~ ~           ~ 1 0
50 Cl* NGC 1039 JP 317a * ~ ~           ~ 2 0
51 Cl* NGC 1039 JP 317b * ~ ~           ~ 2 0
52 Cl* NGC 1039 JP 156b * ~ ~           ~ 2 0
53 Cl* NGC 1039 JP 156a * ~ ~           ~ 2 0
54 Cl* NGC 1039 JP 257a * ~ ~           ~ 1 0

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