2009MNRAS.399..888M

Query : 2009MNRAS.399..888M

2009MNRAS.399..888M - Mon. Not. R. Astron. Soc., 399, 888-905 (2009/October-3)

The chromospheric emission of solar-type stars in the young open clusters IC 2391 and IC 2602.

MARSDEN S.C., CARTER B.D. and DONATI J.-F.

Abstract (from CDS):

In this paper we present chromospheric emission levels of the solar-type stars in the young open clusters IC 2391 and IC 2602. High-resolution spectroscopic data were obtained for over 50 F, G and K stars from these clusters over several observing campaigns using the University College London Echelle Spectrograph on the 3.9-m Anglo-Australian Telescope. Unlike older clusters, the majority (28/52) of the solar-type stars in the two clusters are rapid rotators (vsini > 20km/s) with five of the stars being classified as ultra-rapid rotators (vsini > 100 km/s). The emission levels in the calcium infrared triplet lines were then used as a measure of the chromospheric activity of the stars. When plotted against the Rossby number (NR), the star's chromospheric emission levels show a plateau in the emission for log(NR) ≲ -1.1 indicating chromospheric saturation similar to the coronal saturation seen in previously observed X-ray emission from the same stars. However, unlike the coronal emission, the chromospheric emission of the stars shows little evidence of a reduction in emission (i.e. supersaturation) for the ultra-rapid rotators in the clusters. Thus we believe that coronal supersaturation is not the result of an overall decrease in magnetic dynamo efficiency for ultra-rapid rotators.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): stars: activity - stars: late-type - stars: rotation - open clusters and associations: individual: IC 2391 - open clusters and associations: individual: IC 2602

Simbad objects: 94

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Number of rows : 94
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 HD 16673 SB* 02 40 12.4210104672 -09 27 10.335330216   6.294 5.790     F8VFe-0.4 262 0
2 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
3 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
4 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
5 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
6 NGC 2547 OpC 08 10 01.5 -49 12 08           ~ 445 0
7 VXR PSPC 2a * 08 37 55.5737657592 -52 57 10.895343372   12.26 11.34 11.42   G9 12 0
8 VXR PSPC 2b * 08 37 56.2348817040 -52 57 05.505544404       12.49   ~ 19 0
9 CD-52 2467 * 08 38 22.9092124584 -52 56 48.041148444   11.61 10.93 10.81   ~ 40 0
10 CD-52 2472 SB* 08 38 55.6626968784 -52 57 51.679265796 11.19 11.01 10.33 10.19   G2 51 0
11 CD-52 2473 SB* 08 38 59.8085961096 -53 01 26.206476240 10.00 10.08 9.62     F5V 34 0
12 HD 74009 * 08 39 03.3941906520 -52 42 39.709905264   9.51 9.37 9.48   F3V 33 0
13 CD-52 2482 * 08 39 38.8131754176 -53 10 07.119992820   10.59 9.95     G: 27 0
14 V* V364 Vel BY* 08 39 53.0493554064 -52 57 56.847553812   12.75 11.89 11.69   K0 49 0
15 V* V365 Vel BY* 08 40 06.2321644608 -53 38 06.875687760   11.07 10.47 10.44   G0 49 0
16 VXR PSPC 16a * 08 40 16.2484046424 -52 56 29.172145452   12.48 11.76 11.60   G9 40 0
17 Cl* IC 2391 SMY 23 * 08 40 49.1007179088 -53 37 45.364323468   11.91 11.15 10.84   G6 47 0
18 HD 74340 SB* 08 41 09.9773642568 -52 54 10.540967328   10.33 9.87     F5V 51 0
19 Cl* IC 2391 PMM 6478 * 08 41 10.9813538136 -52 31 46.692752052   11.74 11.50     ~ 21 0
20 IC 2391 66 PM* 08 41 16.1712190728 -53 04 26.015600928   12.51 11.69     ~ 14 0
21 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
22 CPD-52 1594 * 08 41 24.0355869504 -52 59 04.664102316   11.70 10.87     ~ 4 0
23 V* V366 Vel BY* 08 41 25.8875436000 -53 22 41.467632456   13.63 12.519   11.277 K3e 44 0
24 Cl* IC 2391 SHJM 7 SB* 08 41 52.1694642216 -53 06 46.668430332   13.62 12.52     G7 13 1
25 CD-52 2501 * 08 42 12.2935097520 -53 06 03.797278668           F5V 41 0
26 V* V370 Vel BY* 08 42 14.7556955232 -52 56 02.325566004   11.775 10.827 10.541 9.620 G9V 41 0
27 HD 74561 * 08 42 18.2168005824 -53 54 08.168181408   9.76 9.32     F3V 57 0
28 CPD-52 1614 SB* 08 42 46.6075101288 -53 01 01.341693984   10.7 10.3     ~ 43 0
29 V* V374 Vel BY* 08 43 29.2915419936 -52 41 28.328512308   12.59       K0 23 0
30 CD-52 2523 * 08 43 52.3041352704 -53 13 59.755302120   10.22 9.70 9.92   ~ 34 0
31 Cl* IC 2391 D 165 SB* 08 43 56.8096224120 -52 41 05.612960760   12.61 11.77     K0 26 0
32 Cl* IC 2391 PMM 2012 V* 08 43 59.0158397352 -53 33 43.654824216   12.288 11.529 11.516   K0 24 0
33 V* V376 Vel BY* 08 44 05.2223496648 -52 53 17.190402504   11.37 10.75 10.74   G3e: 52 0
34 V* V377 Vel BY* 08 44 26.1593280456 -52 42 32.329984788   12.27 11.51 11.23   G9 52 0
35 V* V379 Vel BY* 08 45 26.9313010080 -52 52 02.105583096   13.79 12.76 12.54   K3e 56 0
36 V* V380 Vel Ro* 08 45 39.1343066088 -52 25 59.548764108   10.35 9.88 9.98   F8 35 0
37 CPD-53 1875 Ro* 08 45 52.7027292840 -53 27 28.292602824   10.95 10.423 10.16 9.707 G2V 25 1
38 TYC 8960-1957-1 * 10 28 31.2267933336 -63 44 15.602582148   12.06 11.31     ~ 39 0
39 RX J1028.9-6432 X 10 28 54.4 -64 32 02           ~ 3 0
40 RX J1030.9-6429 X 10 30 54.7 -64 29 39           ~ 3 0
41 HD 91451 * 10 31 44.9206418496 -63 29 21.941207736   9.61 9.24 9.62   F2V 38 0
42 RX J1032.4-6506 X 10 32 28.6 -65 06 26   14.00 12.77     ~ 6 0
43 TYC 8964-606-1 * 10 33 39.6722547984 -64 46 52.177192932   12.11 11.71     ~ 32 0
44 GSC 08964-00853 * 10 34 14.5731538176 -64 57 21.815140968   13.53 12.52 12.30   ~ 7 0
45 HD 91895 ** 10 34 52.9014216236 -64 53 58.308152678   10.191 9.714 9.763   F6V 27 0
46 HD 307861 * 10 34 58.2597184368 -64 12 37.730454840   10.51 10.01     A5 12 0
47 V* V546 Car BY* 10 36 37.9550737536 -64 47 53.793182148   13.84       ~ 40 0
48 Cl* IC 2602 W 71 * 10 38 17.6636337312 -64 08 06.426429648   11.21 10.52 10.09   G5 47 0
49 HD 307845 * 10 38 30.4522604880 -63 37 01.180895664   11.20 10.67     G 10 0
50 CPD-63 1541 PM* 10 39 11.4194832576 -63 40 15.485805084   11.00 10.44     G0 7 0
51 HD 310112 SB* 10 39 48.4494203256 -65 20 28.807185228   12.08 11.34     A3 12 0
52 V* V550 Car BY* 10 39 55.9705701432 -63 59 30.093460584   13.10       ~ 42 0
53 TYC 8961-1131-1 * 10 40 01.0177027992 -63 18 41.847220296   11.40 10.65     ~ 6 0
54 HD 307942 * 10 40 23.9359403400 -64 30 53.895282696   10.7 10.1     F2 16 0
55 V* V552 Car RR* 10 40 51.3570752544 -64 42 47.828458656   13.418 12.360 12.014 11.033 ~ 27 0
56 HD 307969 * 10 41 52.3733349672 -64 58 32.164821516   11.42 10.76     F2 14 0
57 V* V555 Car BY* 10 42 07.0839584184 -64 46 07.839386688   12.40       G 52 0
58 HD 307918 * 10 42 35.4137209512 -63 36 32.080847976   11.47 10.80     A3 12 0
59 V* V557 Car BY* 10 42 41.5146144624 -64 21 04.333829688   11.26 12.03     G2V 71 0
60 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
61 GSC 08965-00231 * 10 42 56.1040951464 -63 55 51.147555708   12.77 11.90 11.77   G8 36 0
62 HD 307959 * 10 43 56.9922311208 -64 47 39.592757616   11.48 10.80     G0 13 0
63 V* V558 Car BY* 10 44 06.8106499248 -63 59 35.059923708   11.75       G4 57 0
64 HD 307960 * 10 44 13.9347547056 -64 46 27.324614496   12.23 11.32     K1V(e) 29 0
65 V* V559 Car BY* 10 44 22.5515649000 -64 15 30.116510712   11.61       G0 62 0
66 HD 307955 PM* 10 44 40.6953373632 -64 32 57.472187388   11.79 10.84     G5 10 0
67 V* V561 Car BY* 10 44 59.6196312312 -65 02 19.075223040   11.44 10.88 10.54 10.128 G0 59 0
68 HD 307956 * 10 45 02.0748196248 -64 32 56.602750632   11.60 10.96     F5 11 0
69 HD 93405 * 10 45 28.2397717680 -64 13 45.035793660   9.61 9.17     F3/5V 33 0
70 V* V563 Car BY* 10 45 29.8672627248 -64 25 20.167535208   11.64 10.64 10.53   G5 22 0
71 HD 308030 Pe* 10 45 47.8866352752 -65 00 41.177565720   10.46 10.04     A3 14 0
72 V* V564 Car BY* 10 46 14.8321188600 -64 02 58.060489884   11.43 10.89     ~ 48 0
73 HD 308012 * 10 46 28.7870310120 -64 07 57.570933396   10.4 9.9     F8 46 0
74 V* V565 Car BY* 10 46 35.3087927664 -64 03 44.596323900   13.86 12.66 12.38   ~ 24 0
75 V* V566 Car BY* 10 46 51.8026332840 -63 34 15.765895812   14.19       ~ 41 0
76 HD 93796 PM* 10 48 12.9825479880 -63 37 24.944996208   10.49 9.86     G0 31 0
77 CPD-62 1760 PM* 10 48 13.2838347240 -63 37 39.203831568   10.52 9.94     F8V 26 0
78 V* V567 Car BY* 10 48 18.3921107208 -64 09 53.338378428   11.0       G 39 0
79 HD 308025 * 10 49 11.4696339576 -64 38 00.387264120   11.1 10.77     F2 7 0
80 V* V570 Car BY* 10 49 48.4012130280 -64 46 28.467956388   12.26 11.32     G9Ve 58 0
81 HD 308008 * 10 49 55.1690669928 -63 57 40.388756004   10.15 9.72     A5 11 0
82 V* V571 Car BY* 10 49 56.8358871072 -63 48 19.080513396   14.19       ~ 24 0
83 CPD-63 1712 * 10 51 28.9729478952 -63 46 02.888395896   11.89 12.15     B0/3: 8 0
84 * alf Cen B PM* 14 39 35.06311 -60 50 15.0992 2.89 2.21 1.33     K1V 1092 2
85 * alf Cen A SB* 14 39 36.49400 -60 50 02.3737 0.96 0.72 0.01     G2V 1352 1
86 NGC 6475 OpC 17 53 44.1 -34 49 36           ~ 413 0
87 [RSP95] 8A X ~ ~   11.06 10.41     ~ 5 0
88 VXR PSPC 80a * ~ ~     11.98     K2 8 0
89 [RSP95] 54A X ~ ~   13.28 12.13     ~ 4 0
90 [RSP95] 3A X ~ ~   12.19 11.32     ~ 3 0
91 [RSP95] 45A X ~ ~   11.39 10.73     ~ 4 0
92 Cl* IC 2602 W 91 * ~ ~   11.51 10.73     G0 3 0
93 Cl* IC 2391 PMM 6576 * ~ ~     12.54     G6 8 0
94 [RSP95] 15A X ~ ~   12.67 11.75     ~ 5 0

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