1996A&A...307L..45D

Query : 1996A&A...307L..45D

1996A&A...307L..45D - Astronomy and Astrophysics, volume 307, L45-48 (1996/3-3)

Mechanical heating levels in ultra-fast rotating dwarfs.

DOYLE J.G.

Abstract (from CDS):

Using available observational data we have estimated the total radiative output from the chromospheric/coronal plasma as a result of magnetic heating for several F, G, K & M dwarfs. When tabulated as a function of the bolometric flux, a clear 'levelling-off/saturation' exists for the faster rotators as found previously when using single spectral lines. However, using recent chromospheric radiative transfer model calculations it is shown that this 'saturation' can be due to a significantly larger fraction of the losses being radiated by hydrogen in the ultraviolet/optical/infrared continuum regions. The implication being that these ultra-fast rotators have a high density chromosphere, plus a high temperature minimum, although additional chromospheric model calculations are required which include better molecular line opacities plus and an extension of the models for stars with higher effective temperatures.

Abstract Copyright: ∼

Journal keyword(s): stars: rotation - chromospheric activity - late-types - Rossby number

Simbad objects: 70

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Number of rows : 70
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 * 9 Cet BY* 00 22 51.7884553555 -12 12 33.969921319 7.29 7.05 6.39     G2.5V 487 0
2 V* BI Cet RS* 01 22 50.2948434816 +00 42 43.397347032   9.01 8.162 7.8 7.302 G5V 111 0
3 V* CC Eri BY* 02 34 22.5661889568 -43 47 46.869120096 11.305 10.201 8.865 7.926 6.992 K7V 270 0
4 HD 16673 SB* 02 40 12.4210104672 -09 27 10.335330216   6.294 5.790     F8VFe-0.4 244 0
5 * tet Per PM* 02 44 11.9866154103 +49 13 42.414669174 4.62 4.62 4.11 3.67 3.37 F8V 405 0
6 HD 17925 RS* 02 52 32.1281856011 -12 46 10.968056223 7.48 6.91 6.05 5.34 4.89 K1V 514 0
7 * iot Per PM* 03 09 04.0193012009 +49 36 47.802053343 4.76 4.64   3.7   G0V 548 0
8 * kap01 Cet BY* 03 19 21.6964175772 +03 22 12.714979884 5.71 5.52 4.85 4.27 3.91 G5V 890 0
9 * eps Eri BY* 03 32 55.8444911587 -09 27 29.739493865 5.19 4.61 3.73 3.00 2.54 K2V 1932 1
10 HD 22403 PM* 03 37 11.0381580962 +25 59 27.954176922       6.9   G4 122 0
11 * 39 Tau ** 04 05 20.2580439192 +22 00 32.057399592   6.54 5.90 5.5   G5V 220 0
12 V* AG Dor RS* 04 07 29.1836707992 -52 34 17.227000956   9.50 8.595   7.526 K2IV-Vk 90 0
13 * 50 Per RS* 04 08 36.6171573432 +38 02 23.058806100 7.78 5.97   5.2   F8V 218 0
14 V* V895 Tau BY* 04 24 12.4710867960 +14 45 29.565731196   8.217 7.583 8.43   G0V(e) 224 0
15 HD 27859 BY* 04 24 28.3269703416 +16 53 10.202918748   8.382 7.790     G2V 224 0
16 * 70 Tau SB* 04 25 37.3225242048 +15 56 27.683560428   6.951 6.439 7.75   F7V 270 0
17 HD 283750 BY* 04 36 48.2421502608 +27 07 55.888214520   9.354   7.4   K2.5Ve 273 2
18 * 58 Eri BY* 04 47 36.2917029384 -16 56 04.040472552   6.14 5.50     G2.5IV-V 428 0
19 V* V1005 Ori BY* 04 59 34.8342878424 +01 47 00.669818328   11.48 10.107 9.603 8.239 M0Ve 342 0
20 * lam Aur PM* 05 19 08.4754499121 +40 05 56.585080940 5.46 5.33 4.71 4.18 3.86 G1.5IV-VFe-1 533 0
21 * 111 Tau BY* 05 24 25.4632701888 +17 23 00.726415944   5.52   4.7   F8V 339 0
22 V* AB Dor TT* 05 28 44.8712165880 -65 26 55.199147208 8.259 7.856 6.999 6.496 5.993 K0V 1021 0
23 * chi01 Ori RS* 05 54 22.9829893 +20 16 34.222038 5.08 5.00 4.40 3.90 3.59 G0V 851 0
24 V* YY Gem BY* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 854 0
25 V* YZ CMi Er* 07 44 40.1723046464 +03 33 08.875227574 13.761 12.831 11.225 9.958 8.263 M4.0Ve 885 0
26 * 9 Pup SB* 07 51 46.30295 -13 53 52.9169           G0V 243 0
27 V* LU Hya RS* 08 25 14.0808185760 -07 10 12.852556104   8.30 7.35     K0V 63 0
28 * pi.01 UMa BY* 08 39 11.7046112880 +65 01 15.263122512 6.33 6.26 5.64 5.12 4.79 G0.5V 567 0
29 HD 78366 PM* 09 08 51.0703818408 +33 52 55.986351384   6.53   5.6   G0IV-V 247 0
30 V* LQ Hya BY* 09 32 25.5683895648 -11 11 04.692242760 9.316 8.761 7.891 7.288 6.815 K1Vp 459 0
31 * 11 LMi RS* 09 35 39.5021937366 +35 48 36.477051175 6.560 6.110 5.340 4.79 4.42 G8Va 372 0
32 V* AD Leo Er* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1340 1
33 HD 90089 PM* 10 31 04.7079248136 +82 33 31.146280416   5.622 5.252     F4VkF2mF2 139 0
34 * 37 UMa PM* 10 35 09.6937360824 +57 04 57.487315116   5.481 5.148     F1V 182 1
35 HD 95735 Er* 11 03 20.1948195942 +35 58 11.576182057 10.030 8.960 7.520 5.99 4.79 M2+V 715 0
36 HD 97334 BY* 11 12 32.3503039560 +35 48 50.688978228   7.02   6.0   G2 283 0
37 * 61 UMa PM* 11 41 03.0162706212 +34 12 05.881605449 6.31 6.08 5.34 4.73 4.38 G8V 612 0
38 * bet CVn ** 12 33 44.5442516547 +41 21 26.921352859 4.91 4.86 4.25 3.73 3.42 G0V 579 0
39 * 10 CVn PM* 12 44 59.4049642264 +39 16 44.098132297 6.47 6.50 5.95 5.41 5.12 F9V_Fe-0.3 372 0
40 HD 111456 ** 12 48 39.4470003426 +60 19 11.037876361   6.299 5.831     F6V 202 1
41 * 78 UMa ** 13 00 43.69949 +56 21 58.8102   5.29 4.93     F2V 274 0
42 * bet Com PM* 13 11 52.3938268062 +27 52 41.462309460 4.92 4.84 4.25 3.77 3.47 F9.5V 908 0
43 * e Vir PM* 13 16 46.5148594512 +09 25 26.960139646   5.81   4.8   G0V 551 1
44 HD 118100 Er* 13 34 43.2063495866 -08 20 31.338030204 11.578 10.552 9.372 8.602 7.930 K5Ve 346 0
45 * ksi Boo BY* 14 51 23.37993 +19 06 01.6994 5.618 5.370 4.593 3.91 3.48 G7Ve+K5Ve 474 0
46 * lam Ser PM* 15 46 26.6142121632 +07 21 11.047378824 5.13 5.03 4.42 3.92 3.60 G0-V 573 0
47 * chi Her PM* 15 52 40.5410491705 +42 27 05.462878877 5.19 5.19 4.62 4.14 3.82 F8VFe-2Hdel-1 505 0
48 * tet Dra SB* 16 01 53.3449795946 +58 33 54.901935955 4.630 4.520 4.000 3.56 3.31 F9V 293 0
49 * sig CrB RS* 16 14 40.85557 +33 51 30.9497           F6V+G0V 493 0
50 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 438 0
51 * 12 Oph BY* 16 36 21.4496896968 -02 19 28.513024233 7.00 6.55 5.77 5.13 4.74 K1V 487 0
52 V* V2213 Oph BY* 17 05 16.8186610814 +00 42 09.221511649   6.59   5.6   F8.5IV-V 339 0
53 * 36 Oph A PM* 17 15 20.7836485323 -26 36 06.117207947   5.93 5.08     K2V 269 1
54 HD 160346 SB* 17 39 16.9163262 +03 33 18.875718   7.496 6.525 5.9   K3-V 302 0
55 * 70 Oph ** 18 05 27.28518 +02 30 00.3558 5.40 4.89 4.03 3.38 2.92 K0-V 649 0
56 V* V815 Her RS* 18 08 16.0497803784 +29 41 28.261731012   8.40 7.70     G5 141 0
57 V* BY Dra BY* 18 33 55.7720712062 +51 43 08.897780286 10.22 9.23   8.733   K4Ve+K7.5Ve 620 0
58 V* PZ Tel BY* 18 53 05.8735056984 -50 10 49.897437168   9.22 8.342   7.464 G9IV 332 0
59 HD 175742 RS* 18 55 53.2250061997 +23 33 23.932761771 9.524 8.941 8.019 7.483 6.958 K0V 188 0
60 V* V478 Lyr RS* 19 07 32.3867835408 +30 15 16.174368324   8.54   7.3   G6V 126 0
61 HD 190007 BY* 20 02 47.0456863896 +03 19 34.265904204   8.60   6.8   K5V 223 0
62 HD 197481 BY* 20 45 09.5324974119 -31 20 27.237889841   10.05 8.627 9.078 6.593 M1VeBa1 1153 0
63 V* BO Mic BY* 20 47 45.0056152368 -36 35 40.769832192   10.39 9.337   8.216 K3V(e) 198 0
64 HD 200391 Ae* 21 02 25.9070119848 +27 48 26.444060604   7.93 7.374   6.624 G0V+G5V 354 0
65 * 61 Cyg A BY* 21 06 53.9395895022 +38 44 57.902349973 7.50 6.39 5.21 4.19 3.54 K5V 1035 0
66 * 61 Cyg B Er* 21 06 55.2638444466 +38 44 31.358519864 8.63 7.40 6.03 4.86 3.55 K7V 721 0
67 V* HN Peg BY* 21 44 31.3299461136 +14 46 18.983292600       6.16   G0V+ 515 0
68 V* FK Aqr SB* 22 38 45.5746238605 -20 37 16.087447076 11.714 10.595 9.083 8.073 6.876 M0Vep 280 0
69 V* EV Lac Er* 22 46 49.7312610268 +44 20 02.374381562   11.85 10.26 9.89   M4.0Ve 902 2
70 V* HK Aqr BY* 23 08 19.5510173448 -15 24 35.766079704 13.4 12.282 10.872 9.964 9.019 M0Ve 211 0

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