2011ApJ...738..164C

Query : 2011ApJ...738..164C

2011ApJ...738..164C - Astrophys. J., 738, 164 (2011/September-2)

The search for super-saturation in chromospheric emission.

CHRISTIAN D.J., MATHIOUDAKIS M., ARIAS T., JARDINE M. and JESS D.B.

Abstract (from CDS):

We investigate if the super-saturation phenomenon observed at X-ray wavelengths for the corona exists in the chromosphere for rapidly rotating late-type stars. Moderate resolution optical spectra of fast-rotating EUV- and X-ray-selected late-type stars were obtained. Stars in α Per were observed in the northern hemisphere with the Isaac Newton 2.5 m telescope and Intermediate Dispersion Spectrograph. Selected objects from IC 2391 and IC 2602 were observed in the southern hemisphere with the Blanco 4 m telescope and R-C spectrograph at CTIO. Ca II H and K fluxes were measured for all stars in our sample. We find the saturation level for Ca II K at log (LCaK/L bol) = -4.08. The Ca II K flux does not show a decrease as a function of increased rotational velocity or smaller Rossby number as observed in the X-ray. This lack of "super-saturation" supports the idea of coronal stripping as the cause of saturation and super-saturation in stellar chromospheres and coronae, but the detailed underlying mechanism is still under investigation.

Abstract Copyright: ∼

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

Simbad objects: 67

goto Full paper

goto View the references in ADS

Number of rows : 67
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 * tau Per SB* 02 54 15.4777208304 +52 45 44.882735292 5.17 4.71 3.96 3.33 2.89 G8III+A7V 175 0
2 HD 19305 PM* 03 06 26.7370541893 +01 57 54.630530984 11.697 10.44 9.055 8.201 7.427 M0V 145 0
3 Cl Melotte 20 350 * 03 17 36.9406448668 +48 50 08.506254302   11.87 11.20 10.99   G3 52 1
4 V* V524 Per BY* 03 18 58.6914978000 +48 50 42.355021776     13.609     K5 32 0
5 V* V526 Per BY* 03 19 57.6810280256 +49 52 06.826530073   13.16       ~ 35 0
6 V* V528 Per BY* 03 21 16.0681180463 +48 35 07.229481475   13.93       ~ 25 0
7 V* V529 Per BY* 03 22 06.8239849885 +47 34 06.690341597   12.76 11.64     K2 26 0
8 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 870 1
9 V* V485 Per BY* 03 24 25.1123343624 +48 48 21.120434568   15.41 14.12     K5 39 0
10 V* V530 Per BY* 03 24 48.3831600744 +48 53 19.834031868   12.53       G8V 36 0
11 2MASS J03251623+4822239 Y*O 03 25 16.2287841500 +48 22 23.917022860   13.13 12.25   11.50 K0 46 0
12 Cl* Melotte 20 AP 112 * 03 25 31.9139680560 +48 30 11.007712836   14.85 13.72     ~ 28 0
13 2MASS J03261639+4850284 Y*O 03 26 16.4037441384 +48 50 28.378535208   13.57 12.61     ~ 38 0
14 V* V486 Per BY* 03 26 27.6565713168 +49 02 12.376063176   13.81 12.84     ~ 39 0
15 V* V487 Per BY* 03 27 23.3200091938 +48 22 24.564083842   14.08 12.86 12.82   ~ 37 0
16 V* V534 Per BY* 03 27 51.0409823520 +49 12 10.044080460   13.21 12.29     K2 36 0
17 2MASS J03280080+4900009 Y*O 03 28 00.8006660448 +49 00 00.929251080   14.05 13.00   12.09 K0 34 0
18 V* V535 Per BY* 03 28 10.5192843366 +47 25 26.329368995           ~ 26 0
19 V* V536 Per BY* 03 28 48.4904384760 +49 11 54.214693224   14.00       ~ 29 0
20 V* V489 Per RR* 03 30 22.5031162374 +48 24 41.305843822   15.63 14.31     ~ 30 0
21 Cl* Melotte 20 AP 197 * 03 30 28.7 +47 38 28   13.31 12.31   11.33 ~ 9 0
22 Cl Melotte 20 917 Y*O 03 30 47.6112480597 +47 53 21.489257302   11.59 10.93     F4 48 0
23 V* V537 Per BY* 03 32 30.6927252072 +49 10 34.585590360   13.79 11.89     G8 44 0
24 Cl* Melotte 20 AP 199 * 03 32 44.4412375680 +47 41 35.139010200   13.08 12.10     ~ 14 0
25 V* V410 Tau Or* 04 18 31.1081296680 +28 27 16.155955728   12.13 10.75 8.45 9.408 K3Ve 483 0
26 V* RY Tau TT* 04 21 57.4092550080 +28 26 35.555316612 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 744 1
27 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
28 V* V1005 Ori BY* 04 59 34.8342878424 +01 47 00.669818328   11.48 10.107 9.603 8.239 M0Ve 371 0
29 BD+20 1790 BY* 07 23 43.5893479416 +20 24 58.650645816   11.08 10.001 9.43 8.522 K5e 101 0
30 V* YZ CMi PM* 07 44 40.1723046464 +03 33 08.875227574 13.761 12.831 11.225 9.958 8.263 M4.0Ve 957 0
31 NGC 2516 OpC 07 58 00.5 -60 46 36           ~ 793 0
32 BD+21 1764 PM* 08 08 13.1858384276 +21 06 18.248947590   10.89   8.7   K7Ve 78 0
33 NGC 2547 OpC 08 10 01.5 -49 12 08           ~ 445 0
34 BD-15 2429 ** 08 25 51.6016571448 -16 22 47.247090456   11.45 10.29 9.73 9.36 K7V+M0/2:V 52 0
35 V* CV Cnc SB* 08 31 37.422792 +19 23 49.28208   15.1 14.83 13.057   M4.0Ve 88 0
36 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
37 V* V371 Vel BY* 08 42 18.5563649256 -53 01 56.872692444   15.44       M2e 37 0
38 V* V373 Vel BY* 08 43 27.7498717776 -52 57 39.097540332       14.12   ~ 26 0
39 V* V374 Vel BY* 08 43 29.2915419936 -52 41 28.328512308   12.59       K0 23 0
40 G 196-3 PM* 10 04 21.4627410744 +50 23 13.386435576       11.323   M3.0V 90 0
41 HD 88230 PM* 10 11 22.1399492383 +49 27 15.251007087 9.23 7.94 6.61 5.36 4.56 K6VeFe-1 494 0
42 V* AD Leo PM* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1469 1
43 TYC 8964-165-1 * 10 29 32.7541192632 -63 49 15.558609936   12.37 11.34     K1IV 33 0
44 V* V547 Car BY* 10 37 22.2685053384 -64 43 19.991947836   16.67       ~ 18 0
45 V* V550 Car BY* 10 39 55.9705701432 -63 59 30.093460584   13.10       ~ 42 0
46 V* V552 Car RR* 10 40 51.3570752544 -64 42 47.828458656   13.418 12.360 12.014 11.033 ~ 27 0
47 V* V557 Car BY* 10 42 41.5146144624 -64 21 04.333829688   11.26 12.03     G2V 71 0
48 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
49 GSC 08965-00231 * 10 42 56.1040951464 -63 55 51.147555708   12.77 11.90 11.77   G8 36 0
50 V* V564 Car BY* 10 46 14.8321188600 -64 02 58.060489884   11.43 10.89     ~ 48 0
51 V* V565 Car BY* 10 46 35.3087927664 -64 03 44.596323900   13.86 12.66 12.38   ~ 24 0
52 V* V571 Car BY* 10 49 56.8358871072 -63 48 19.080513396   14.19       ~ 24 0
53 Wolf 359 PM* 10 56 28.9208702274 +07 00 53.003285286 16.706 15.541 13.507 11.684 9.507 dM6 775 0
54 HD 95735 PM* 11 03 20.1948195942 +35 58 11.576182057 10.030 8.960 7.520 5.99 4.79 M2+V 795 0
55 V* V857 Cen PM* 11 31 46.5132515177 -41 02 47.176629463 14.129 13.082 11.535 10.384 8.838 M3.5 98 0
56 CD-33 7795 TT* 11 31 55.2608963280 -34 36 27.203892120   12.97 11.524 11.150 9.150 M2Ve 205 0
57 CD-69 1055 Or* 12 58 25.5840183960 -70 28 49.148391324   10.77 9.992   8.941 K0Ve 50 0
58 * ksi Boo BY* 14 51 23.37993 +19 06 01.6994 5.618 5.370 4.593 3.91 3.48 G7Ve+K5Ve 503 0
59 V* PZ Tel BY* 18 53 05.8735056984 -50 10 49.897437168   9.22 8.342   7.464 G9IV 364 0
60 BD+22 4409 BY* 21 31 01.7140062576 +23 20 07.374015564   10.240 9.245 8.6 7.965 K3Vke 187 0
61 V* FK Aqr SB* 22 38 45.5746238605 -20 37 16.087447076 11.714 10.595 9.083 8.073 6.876 M0Vep 302 0
62 V* EV Lac PM* 22 46 49.7312610268 +44 20 02.374381562   11.85 10.26 9.89   M4.0Ve 993 2
63 V* GT Peg BY* 22 51 53.5351209551 +31 45 15.192825225       11.281   M3.5Ve 174 0
64 V* HK Aqr BY* 23 08 19.5510173448 -15 24 35.766079704 13.4 12.282 10.872 9.964 9.019 M0Ve 219 0
65 [RSP95] 24A * ~ ~   16.04 14.61     ~ 11 0
66 Cl* IC 2391 PMM 6576 * ~ ~     12.54     G6 8 0
67 VXR PSPC 80a * ~ ~     11.98     K2 8 0

To bookmark this query, right click on this link: simbad:objects in 2011ApJ...738..164C and select 'bookmark this link' or equivalent in the popup menu