1999MNRAS.310.1023A


Query : 1999MNRAS.310.1023A

1999MNRAS.310.1023A - Mon. Not. R. Astron. Soc., 310, 1023-1032 (1999/December-3)

Photometric modelling of starspots - I. A Barnes-Evans-like surface brightness-colour relation using (Ic-K).

AMADO P.J., BUTLER C.J. and BYRNE P.B.

Abstract (from CDS):

In the first part of this work, the empirical correlation of stellar surface brightness FV with (Ic-K) broad-band colour is investigated by using a sample of stars cooler than the Sun. A bilinear correlation is found to represent well the brightness of G, K and M giant stars. The change in slope occurs at (Ic-K)∼2.1 or at about the transition from K to M spectral types. The same relationship is also investigated for dwarf stars and found to be distinctly different from that of the giants. The dwarf star correlation differs by an average of -0.4 in (Ic-K) or by a maximum in FV of ~-0.1, positioning it below that of the giants, with both trends tending towards convergence for the hotter stars in our sample. The flux distribution derived from the FV-(Ic-K) relationship for the giant stars, together with that derived from an FV-(V-K) relationship and the blackbody flux distribution, is then utilized to compute synthetic light V and colour (V-R)c, (V-I)c and (V-K) curves of cool spotted stars. We investigate the effects on the amplitudes of the curves by using these FV-colour relations and by assuming the effective gravity of the spots to be lower than the gravity of the unspotted photosphere. We find that the amplitudes produced by using the FV-(Ic-K) relationship are larger than those produced by the other two brightness correlations, meaning smaller and/or warmer spots.

Abstract Copyright: 1999, Royal Astronomical Society

Journal keyword(s): stars: activity - stars: late-type

Simbad objects: 110

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Number of rows : 110
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 G 158-27 PM* 00 06 43.1973190107 -07 32 17.019101068     13.837 13.605 10.15 M5.5V 193 0
2 * chi Peg PM* 00 14 36.1642825005 +20 12 24.130377664 8.280 6.380 4.800 3.45 2.32 M2+III 186 0
3 V* GQ And Er* 00 18 25.8251408611 +44 01 38.092431857   12.84 11.04 10.3   M3.5V 270 0
4 * 47 Psc LP* 00 28 02.9147612952 +17 53 35.257375248 8.53 6.71 5.06 3.32 1.78 M3III 98 0
5 * del Psc PM* 00 48 40.94433 +07 35 06.2926 7.83 5.95 4.44 3.27 2.40 K5-III 182 0
6 * eta Cas PM* 00 49 06.2945942922 +57 48 54.638239716 4.04 4.02 3.44 2.94 2.58 F9V 621 0
7 G 69-47 SB* 01 05 37.6425066824 +28 29 33.572409149   16.69   13.7   M5.42 62 0
8 * bet And PM* 01 09 43.92388 +35 37 14.0075 5.58 3.62 2.05 0.81 -0.19 M0+IIIa 545 0
9 G 272-61B Er* 01 39 01.6377185550 -17 57 01.001240728           M6V 837 0
10 * nu. Psc * 01 41 25.8939097 +05 29 15.406225 7.36 5.81 4.44 3.38 2.67 K3III 232 0
11 * ups Cet PM* 02 00 00.3091617 -21 04 40.194571 7.45 5.58 4.02 2.76 1.72 M0III 98 0
12 * alf Ari PM* 02 07 10.40570 +23 27 44.7032 4.29 3.17 2.01 1.15 0.54 K2-IIIbCa-1 617 1
13 * rho02 Ari LP* 02 55 48.4979998 +18 19 53.902936 8.56 7.44 5.93 3.51 1.34 M6-III: 218 0
14 * alf Cet LP? 03 02 16.77307 +04 05 23.0596 6.10 4.17 2.53 1.18 0.02 M1.5IIIa 451 0
15 Wolf 134 LM* 03 13 24.2289412566 +18 49 37.661544985   15.567 14.117 13.219 12.435 esdK7 57 0
16 * gam Eri LP? 03 58 01.7669489 -13 30 30.669770 6.52 4.54 2.94 1.68 0.68 M0III-IIIb 183 0
17 * alf Tau LP? 04 35 55.23907 +16 30 33.4885 4.32 2.40 0.86 -0.37 -1.31 K5+III 1229 1
18 * eps Lep PM* 05 05 27.6653698 -22 22 15.723893 6.41 4.64 3.18 2.08 1.27 K4III 152 0
19 G 96-29 PM* 05 17 23.8623810386 +45 50 22.927685973       9.70   M2.5V 66 0
20 Ross 42 Er* 05 32 14.6565094848 +09 49 14.927561364 14.226 13.158 11.529 10.37 8.868 M4Ve 127 1
21 Ross 47 BY* 05 42 09.2676872099 +12 29 21.604835564 14.264 13.130 11.509 10.298 8.709 M4V 257 0
22 V* V440 Aur LP? 05 51 25.7504478024 +32 07 28.891121016 10.04 8.00 6.26 4.69 3.30 M3III 64 0
23 * mu. Gem LP* 06 22 57.62686 +22 30 48.8979 6.37 4.51 2.87 1.30 -0.08 M3IIIab 373 1
24 HD 260655 PM* 06 37 10.7988015297 +17 33 53.333221083 12.303 11.104 9.593 8.661 7.718 M0.0V 162 0
25 * tet CMa PM* 06 54 11.3988612864 -12 02 19.061163780 7.20 5.51 4.08 2.95 2.17 K3/4III 213 0
26 V* QY Aur SB* 07 10 01.8335758745 +38 31 46.086503300   13.26 11.52 11.12   M4.5Ve 222 0
27 BD+05 1668 PM* 07 27 24.4989685603 +05 13 32.841491057 12.558 11.443 9.872 8.699 7.161 M3.5V 385 0
28 * alf Gem A SB* 07 34 35.862828 +31 53 17.79429     1.9     A1.5IV+ 385 0
29 * alf Gem B SB* 07 34 36.100452 +31 53 18.57117     3.0     kA0hA2:mA1IVs 289 1
30 V* YY Gem BY* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 843 0
31 V* YZ CMi Er* 07 44 40.1723046464 +03 33 08.875227574 13.761 12.831 11.225 9.958 8.263 M4.0Ve 848 0
32 * bet Gem PM* 07 45 18.94987 +28 01 34.3160 3.00 2.14 1.14 0.39 -0.11 K0IIIb 1084 1
33 Ross 619 PM* 08 11 57.5691729379 +08 46 22.952885566   14.60 12.834 12.527   M4.5V 189 0
34 * bet Cnc PM* 08 16 30.9210081 +09 11 07.957924 6.750 5.000 3.520 2.42 1.62 K4IIIBa0.5: 358 0
35 G 51-15 Er* 08 29 49.3527921926 +26 46 33.624143059   16.87   14.736   M6.5Ve 278 0
36 * alf Lyn PM* 09 21 03.3002104870 +34 23 33.213441656 6.63 4.69 3.14 1.91 1.01 K6III 204 0
37 * tet Pyx * 09 21 29.5903106784 -25 57 55.586267712 8.36 6.33 4.72 3.32 2.24 M0.5IIIBa0.5 66 0
38 * alf Hya * 09 27 35.24270 -08 39 30.9583 5.14 3.42 1.97 0.93 0.16 K3IIIa 422 0
39 * pi. Leo V* 10 00 12.8058902 +08 02 39.203224 8.22 6.30 4.70 3.27 2.19 M2-III 143 0
40 * 31 Leo PM* 10 07 54.2701166766 +09 59 51.024749763 7.57 5.82 4.38 3.26 2.49 K3.5IIIbFe-1: 134 0
41 BD+20 2465 Er* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1262 0
42 * 56 Leo LP? 10 56 01.4689991 +06 11 07.327524 8.45 7.24 5.78 3.53 1.44 M5.5III: 167 0
43 Wolf 359 Er* 10 56 28.9208702274 +07 00 53.003285286 16.706 15.541 13.507 11.684 9.507 dM6 688 0
44 HD 95735 Er* 11 03 20.1948195942 +35 58 11.576182057 10.030 8.960 7.520 5.99 4.79 M2+V 682 0
45 * ups Leo * 11 36 56.9308590 -00 49 25.496304 6.05 5.31 4.30 3.58 3.06 G9IIIbFe-0.5 126 0
46 * nu. Vir LP* 11 45 51.5595736 +06 31 45.741287 7.32 5.54 4.04 2.79 1.78 M1III 249 0
47 Ross 128 Er* 11 47 44.3972681420 +00 48 16.400337591 14.223 12.905 11.153 9.859 8.184 dM4 391 0
48 * eps Crv PM* 12 10 07.4805825 -22 37 11.161983 5.79 4.32 2.98 2.05 1.41 K2+IIIa 143 0
49 Wolf 424 ** 12 33 17.361480 +09 01 15.79224 15.398 14.313 12.467 10.937 8.988 M5.5V 310 0
50 * bet CVn ** 12 33 44.5442516547 +41 21 26.921352859 4.91 4.86 4.25 3.73 3.42 G0V 563 0
51 * psi Vir LP* 12 54 21.1634176 -09 32 20.378283 7.94 6.39 4.80 3.23 1.95 M3-III 163 0
52 * del Vir RG* 12 55 36.2086058 +03 23 50.893225 6.76 4.97 3.38 1.86 0.53 M3+III 265 0
53 G 61-21 PM* 12 56 23.7399278898 +15 41 44.593399644   15.117 13.791 12.972 12.258 sdK 38 0
54 BD+13 2618 Er* 13 00 46.5566863405 +12 22 32.677229903 12.314 11.233 9.750 8.785 7.653 M0V 330 1
55 * eps Vir PM* 13 02 10.5978496 +10 57 32.941443 4.45 3.71 2.79 2.16 1.71 G8III-IIIb 540 0
56 V* RS CVn RS* 13 10 36.9077924448 +35 56 05.584994412 8.57 8.51 7.93 7.7   F6IV+G8IV 703 0
57 * bet Com PM* 13 11 52.3938268062 +27 52 41.462309460 4.92 4.84 4.25 3.77 3.47 F9.5V 878 0
58 V* FK Com PM* 13 30 46.7996390256 +24 13 57.781233768   9.04 8.245   7.204 G4III 366 1
59 * 83 UMa LP* 13 40 44.2733508 +54 40 53.889137 8.25 6.29 4.66 3.26 2.14 M2III 136 0
60 * eta Boo SB* 13 54 41.07892 +18 23 51.7946 3.440 3.250 2.680 2.24 1.95 G0IV 685 1
61 V* BY Boo LP? 14 07 55.7560046 +43 51 16.025944 8.52 6.86 5.28 3.43 1.77 M4.5III 170 0
62 * kap Vir PM* 14 12 53.7453840 -10 16 25.333997 7.00 5.53 4.21 3.14 2.39 K2.5IIIFe-0.5 137 0
63 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2257 0
64 LP 271-25 LM* 14 28 43.2275214164 +33 10 39.259309081   21.2   17.8   M9Ve 240 0
65 LP 440-52 LM* 14 39 00.3086540071 +18 39 38.710151529   19.6 18.39 17.3 14.64 sdM7 61 0
66 V* RR UMi LP* 14 57 35.0072853 +65 55 56.856956 7.86 6.19 4.54 2.69 0.97 M4.5III 173 0
67 * bet Boo Er* 15 01 56.7623786 +40 23 26.040607 5.21 4.47 3.52 2.85 2.37 G8IIIaFe-0.5 246 0
68 * del Boo PM* 15 15 30.1629518 +33 18 53.392558 5.12 4.44 3.49 2.76 2.25 G8IIIFe-1 368 0
69 * 42 Lib * 15 40 16.8973226160 -23 49 05.101136148 7.80 6.29 4.96 4.00 3.32 K3-IIICN2 113 0
70 * alf Ser PM* 15 44 16.0743159 +06 25 32.263272 5.080 3.800 2.630 1.82 1.25 K2IIIbCN1 510 0
71 * eps CrB PM* 15 57 35.2514020181 +26 52 40.366652765 6.650 5.360 4.130 3.27 2.64 K2IIIab 256 1
72 * del Oph PM* 16 14 20.73853 -03 41 39.5612 6.30 4.34 2.75 1.46 0.43 M0.5III 354 0
73 * eps Oph PM* 16 18 19.2897431 -04 41 33.034466 4.95 4.21 3.23 2.54 2.05 G9.5IIIbFe-0.5 230 0
74 * g Her AB* 16 28 38.5485851 +41 52 54.040593 7.70 6.53 5.01 2.49 0.26 M6-III 371 0
75 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 427 0
76 EGGR 258 WD* 16 34 21.5518633862 +57 10 08.868180953   15.49   14.9   DQ8 117 0
77 Wolf 629 PM* 16 55 25.2222453644 -08 19 21.296969167 14.691 13.436 11.759 10.574 9.044 M3.5V 211 0
78 HD 152751 SB* 16 55 28.7575690 -08 20 10.787849 11.647 10.593 9.023 7.937 6.565 M3.5Ve 509 1
79 VB 8 Er* 16 55 35.2557374336 -08 23 40.753073075   18.7 16.916 14.566 12.24 M7Ve 416 0
80 Ross 868 Er* 17 19 54.2077697528 +26 30 03.068999297   12.98 11.336 11.060 8.420 M3.5V 155 0
81 * mu.01 Her ** 17 46 27.5472960785 +27 43 14.560978925 4.56 4.17 3.42 2.89 2.51 G5IV 677 0
82 * gam Dra * 17 56 36.36988 +51 29 20.0242 5.630 3.760 2.230 1.08 0.23 K5III 542 0
83 V* OP Her S* 17 56 48.5269765296 +45 21 03.060662328 9.45 7.93 6.32 4.15 2.25 M6S 148 0
84 NAME Barnard's star BY* 17 57 48.4984700685 +04 41 36.113879676 12.497 11.24 9.511 8.298 6.741 M4V 764 2
85 * nu. Oph PM* 17 59 01.5919129 -09 46 25.079852 5.20 4.33 3.34 2.64 2.16 G9IIIa 204 1
86 * lam Sgr PM* 18 27 58.2407185 -25 25 18.114589 4.75 3.85 2.81 2.06 1.50 K1IIIb 270 0
87 V* BY Dra BY* 18 33 55.7720712062 +51 43 08.897780286 10.22 9.23   8.733   K4Ve+K7.5Ve 604 0
88 HD 173740 PM* 18 42 46.8946714770 +59 37 36.721161413   11.705   8.9   M3.5V 320 1
89 Ross 154 Er* 18 49 49.3637762005 -23 50 10.447375350 13.528 12.19 10.43 10.23 7.703 M3.5Ve 361 0
90 * 13 Lyr LP* 18 55 20.1022285 +43 56 45.931489 7.00 5.59 4.00 1.95 0.04 M4.5III 308 1
91 Ross 730 PM* 19 07 05.5646181264 +20 53 16.940417573 13.54 12.397 10.774 9.745 8.543 M2.0V 150 0
92 HD 180617 PM* 19 16 55.2565688720 +05 10 08.040554168 11.768 10.63 9.115 8.076 6.782 M3-V 396 0
93 VB 10 Er* 19 16 57.6109547886 +05 09 01.600923413     17.30     M8V 467 1
94 * 16 Cyg A ** 19 41 48.9534996168 +50 31 30.219536784 6.79 6.59 5.95 5.50 5.17 G1.5Vb 724 0
95 * 16 Cyg B PM* 19 41 51.9726777456 +50 31 03.089030916 7.07 6.86 6.20 5.76 5.42 G3V 856 1
96 G 208-44 Er* 19 53 54.4821159649 +44 24 51.341564299   15.31 13.126 13.083 9.78 M5.5Ve 205 1
97 G 208-45 Er* 19 53 55.1405033909 +44 24 54.147256052   15.97 13.99 14.3 10.27 M6V 179 0
98 * ome Cap V* 20 51 49.2905373888 -26 55 08.885443656 7.66 5.75 4.12 2.87 1.93 M0IIIBa0.5 98 0
99 Wolf 918 PM* 21 09 17.4271514815 -13 18 09.013127841 13.501 12.362 10.869 9.891 8.805 M1V 136 0
100 Ross 775 SB* 21 29 36.8119745172 +17 38 35.865489455 13.177 11.928 10.303 9.163 7.709 M3.0V 127 0
101 V* HK Lac RS* 22 04 56.6083608840 +47 14 04.479131004   8.01 6.96     K0III 235 0
102 V* EZ Aqr Er* 22 38 33.576000 -15 17 59.75700 15.762 14.33 12.38 12.12 8.677 M5V 296 1
103 * lam Aqr LP* 22 52 36.8740445376 -07 34 46.548925356 7.20 5.44 3.79 2.37 1.18 M2.5IIIFe-0.5 172 0
104 HD 217357 PM* 23 00 16.1221501260 -22 31 27.649676482 10.494 9.251 7.869 7.014 6.238 K7+Vk 168 0
105 * bet Peg LP* 23 03 46.45746 +28 04 58.0336 6.05 4.09 2.42 0.92 -0.40 M2.5II-III 586 0
106 * phi Aqr SB* 23 14 19.3582404192 -06 02 56.423128812 7.64 5.77 4.22 2.94 1.86 M1.5III 127 0
107 BD+19 5116 ** 23 31 52.17898 +19 56 14.1505 12.737 11.749 10.165 8.982 7.446 M4+M5 440 0
108 Ross 248 BY* 23 41 55.0363002516 +44 10 38.818911116   14.19   11.1   M5.0V 296 0
109 V* BR Psc BY* 23 49 12.5250852078 +02 24 04.405476893 11.532 10.427 8.993 8.029 6.946 dM1 315 0
110 HD 224085 RS* 23 55 04.0520383542 +28 38 01.245426862 8.88 8.20   6.9   K2+IVeFe-1 715 0

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2023.01.28-11:29:55

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