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

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

1996A&A...307L..45D - Astronomy and Astrophysics, volume 307L45-48 (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 - 2026 		#notes
1 * 9 Cet BY* 00 22 51.7884553555 -12 12 33.969921319 7.29 7.05 6.39     G2.5V 510 0
2 V* BI Cet RS* 01 22 50.2948434816 +00 42 43.397347032   9.01 8.162 7.8 7.302 G5V 119 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 285 0
4 HD 16673 SB* 02 40 12.4210104672 -09 27 10.335330216   6.294 5.790     F8VFe-0.4 262 0
5 * tet Per PM* 02 44 11.9866154103 +49 13 42.414669174 4.62 4.62 4.11 3.67 3.37 F8V 428 0
6 HD 17925 RS* 02 52 32.1281856011 -12 46 10.968056223 7.48 6.91 6.05 5.34 4.89 K1V 557 0
7 * iot Per PM* 03 09 04.0193012009 +49 36 47.802053343 4.76 4.64   3.7   G0V 578 0
8 * kap01 Cet BY* 03 19 21.6964175772 +03 22 12.714979884 5.71 5.52 4.85 4.27 3.91 G5V 948 0
9 * eps Eri BY* 03 32 55.8444911587 -09 27 29.739493865 5.19 4.61 3.73 3.00 2.54 K2V 2073 1
10 HD 22403 PM* 03 37 11.0381580962 +25 59 27.954176922       6.9   G4 128 0
11 * 39 Tau ** 04 05 20.2580439192 +22 00 32.057399592   6.54 5.90 5.5   G5V 235 0
12 V* AG Dor RS* 04 07 29.1836707992 -52 34 17.227000956   9.50 8.595   7.526 K2IV-Vk 94 0
13 * 50 Per RS* 04 08 36.6171573432 +38 02 23.058806100 7.78 5.97   5.2   F8V 238 0
14 V* V895 Tau BY* 04 24 12.4710867960 +14 45 29.565731196   8.217 7.583 8.43   G0V(e) 237 0
15 HD 27859 BY* 04 24 28.3269703416 +16 53 10.202918748   8.382 7.790     G2V 245 0
16 * 70 Tau SB* 04 25 37.3225242048 +15 56 27.683560428   6.951 6.439 7.75   F7V 283 0
17 HD 283750 BY* 04 36 48.2421502608 +27 07 55.888214520   9.19 8.10 7.4   K2.5Ve 289 0
18 * 58 Eri BY* 04 47 36.2917029384 -16 56 04.040472552   6.14 5.50     G2.5IV-V 466 0
19 V* V1005 Ori BY* 04 59 34.8342878424 +01 47 00.669818328   11.48 10.107 9.603 8.239 M0Ve 371 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-1 567 0
21 * 111 Tau BY* 05 24 25.4632701888 +17 23 00.726415944   5.52   4.7   F8V 370 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 1080 0
23 * chi01 Ori SB* 05 54 22.9829893 +20 16 34.222038 5.08 5.00 4.40 3.90 3.59 G0V 895 0
24 V* YY Gem SB* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 882 0
25 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
26 * 9 Pup ** 07 51 46.30295 -13 53 52.9169           G0V 256 0
27 V* LU Hya RS* 08 25 14.0808185760 -07 10 12.852556104   8.30 7.35     K0V 73 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 608 0
29 HD 78366 PM* 09 08 51.0703818408 +33 52 55.986351384   6.53   5.6   G0IV-V 279 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 480 0
31 * 11 LMi RS* 09 35 39.5021937366 +35 48 36.477051175 6.560 6.110 5.340 4.79 4.42 G8Va 407 0
32 V* AD Leo PM* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1469 1
33 HD 90089 PM* 10 31 04.7079248136 +82 33 31.146280416   5.622 5.252     F4VkF2mF2 155 0
34 * 37 UMa PM* 10 35 09.6937360824 +57 04 57.487315116   5.481 5.148     F2V 194 0
35 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
36 HD 97334 BY* 11 12 32.3503039560 +35 48 50.688978228   7.02 6.41     G2 306 0
37 * 61 UMa PM* 11 41 03.0162706212 +34 12 05.881605449 6.31 6.08 5.34 4.73 4.38 G8V 654 0
38 * bet CVn ** 12 33 44.5442516547 +41 21 26.921352859 4.91 4.86 4.25 3.73 3.42 G0V 613 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-0.3 400 0
40 HD 111456 ** 12 48 39.4470003426 +60 19 11.037876361   6.299 5.831     F7V 213 0
41 * 78 UMa ** 13 00 43.69949 +56 21 58.8102   5.29 4.93     F2V 283 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 946 0
43 * e Vir PM* 13 16 46.5148594512 +09 25 26.960139646   5.81   4.8   G0IV 590 1
44 HD 118100 PM* 13 34 43.2063495866 -08 20 31.338030204 11.578 10.552 9.372 8.602 7.930 K5Ve 360 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 503 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 618 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-1 532 0
48 * tet Dra SB* 16 01 53.3449795946 +58 33 54.901935955 4.630 4.520 4.000 3.56 3.31 F9V 304 0
49 * sig CrB RS* 16 14 40.85557 +33 51 30.9497           F6V+G0V 508 0
50 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 467 0
51 * 12 Oph BY* 16 36 21.4496896968 -02 19 28.513024233 7.00 6.55 5.77 5.13 4.74 K1V 525 0
52 V* V2213 Oph BY* 17 05 16.8186610814 +00 42 09.221511649   6.59   5.6   F8.5IV-V 352 0
53 * 36 Oph A PM* 17 15 20.7836485323 -26 36 06.117207947   5.93 5.08     K2V 293 1
54 HD 160346 SB* 17 39 16.9163262 +03 33 18.875718   7.496 6.525 5.9   K3-V 321 0
55 * 70 Oph SB* 18 05 27.28518 +02 30 00.3558 5.40 4.89 4.03 3.38 2.92 K0-V 679 0
56 HD 166181 SB* 18 08 16.0497803784 +29 41 28.261731012   8.42 7.70     G5 151 0
57 V* BY Dra BY* 18 33 55.7720712062 +51 43 08.897780286 10.22 9.23   8.733   K4Ve+K7.5Ve 639 0
58 V* PZ Tel BY* 18 53 05.8735056984 -50 10 49.897437168   9.22 8.342   7.464 G9IV 364 0
59 HD 175742 RS* 18 55 53.2250061997 +23 33 23.932761771 9.524 8.941 8.019 7.483 6.958 K0V 202 0
60 V* V478 Lyr RS* 19 07 32.3867835408 +30 15 16.174368324   8.56 7.78     G6V 135 1
61 HD 190007 BY* 20 02 47.0456863896 +03 19 34.265904204   8.60   6.8   K5V 246 0
62 HD 197481 BY* 20 45 09.5324974119 -31 20 27.237889841   10.05 8.627 9.078 6.593 M1VeBa1 1344 0
63 V* BO Mic BY* 20 47 45.0056152368 -36 35 40.769832192   10.39 9.337   8.216 K3V(e) 214 0
64 HD 200391 Ae* 21 02 25.9070119848 +27 48 26.444060604   7.93 7.374   6.624 G0V+G5V 366 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 1099 0
66 * 61 Cyg B PM* 21 06 55.2638444466 +38 44 31.358519864 8.63 7.40 6.03 4.86 3.55 K7V 765 0
67 V* HN Peg BY* 21 44 31.3299461136 +14 46 18.983292600       6.16   G0V+ 561 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 302 0
69 V* EV Lac PM* 22 46 49.7312610268 +44 20 02.374381562   11.85 10.26 9.89   M4.0Ve 993 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 219 0

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