1998ApJ...507..919O


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.28CET17:57:46

1998ApJ...507..919O - Astrophys. J., 507, 919-937 (1998/November-2)

Measurements of starspot parameters on active stars using molecular bands in echelle spectra.

O'NEAL D., NEFF J.E. and SAAR S.H.

Abstract (from CDS):

We present results from a study of starspot areas (fS) and temperatures (TS), primarily on active, single-lined spectroscopic binaries, determined using molecular absorption bands. Expanding upon our previous studies, we have analyzed multiorder echelle spectra of eight systems to simultaneously measure several different molecular bands and chromospheric emission lines. We determined starspot parameters by fitting the molecular bands of interest, using spectra of inactive G and K stars as proxies for the nonspotted photosphere of the active stars, and using spectra of M stars as proxies for the spots. At least two bands with different Teff sensitivities are required. We found that fitting bands other than the TiO 7055 and 8860 Å features does not greatly extend the temperature range or sensitivity of our technique. The 8860 Å band is particularly important because of its sharply different temperature sensitivity. We did not find any substantial departures from fS or TS that we have measured previously based on single-order spectra. We refined our derived spot parameters using contemporaneous photometry where available. We found that using M giants as spot proxies for subgiant active stars often underestimates f_S_ needed to fit the photometry; this is presumably due to the increase in strength of the TiO bands with decreasing gravity. We also investigated correlations between fS and chromospheric emission, and we developed a simple method to measure nonspot temperature (TQ) solely from our echelle spectra.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Spectroscopic - Stars: Activity - Stars: Fundamental Parameters - Stars: Late-Type - Stars: Spots

Simbad objects: 77

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Number of rows : 77

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* GX And Fl* 00 18 22.8849667932 +44 01 22.637271919   10.120   7.3   M2V 444 1
2 * 47 Psc LP* 00 28 02.9123161359 +17 53 35.243795107 8.53 6.71 5.06 3.32 1.78 M3III 94 0
3 BD+47 612 PM* 02 22 14.6440695182 +47 52 48.110234827   10.85   9.104   M0V 105 0
4 HD 16160 PM* 02 36 04.9023844802 +06 53 12.431588708   6.81   5.2   K3V 479 1
5 * rho02 Ari LP* 02 55 48.4979998 +18 19 53.902936 8.56 7.44 5.93 3.51 1.34 M6-III: 212 0
6 * kap01 Cet BY* 03 19 21.6963205 +03 22 12.715139 5.71 5.52 4.85 4.27 3.91 G5V 816 0
7 * tau04 Eri LP* 03 19 31.0022373 -21 45 28.304953 7.13 5.32 3.70 2.12 0.66 M3III-IIIaCa-1 103 0
8 * omi Tau SB* 03 24 48.7914590778 +09 01 43.994132248 5.090 4.490 3.600 2.92 2.47 G6III 215 0
9 * eps Eri BY* 03 32 55.8449634 -09 27 29.731165 5.19 4.61 3.73 3.00 2.54 K2V 1671 1
10 V* EI Eri RS* 04 09 40.8929265498 -07 53 34.177328732   7.71 7.04     G3V 266 0
11 * omi02 Eri Fl* 04 15 16.3197260 -07 39 10.338087 5.69 5.25 4.43 3.74 3.29 K0V 739 0
12 HD 28343 Fl* 04 29 00.1237376701 +21 55 21.719015238 10.988 9.688 8.300 7.446 6.656 M0.5V 154 0
13 * 54 Eri LP* 04 40 26.5115872790 -19 40 17.372298494 7.80 5.90 4.30 2.81 1.40 M3/4III 66 1
14 HD 32147 PM* 05 00 48.9991346145 -05 45 13.220341956 8.27 7.27 6.21 5.36 4.87 K3+V 409 1
15 HD 32450A PM* 05 02 28.414 -21 15 24.21   10.35 8.66     K7 32 0
16 CD-23 2363 ** 05 03 21.8772681403 -23 15 01.046533656   10.57 9.321 9.496   K6V 47 0
17 HD 36395 PM* 05 31 27.3958475290 -03 40 38.021551815 10.626 9.443 7.968 6.996 5.913 M1.5Ve 423 0
18 * 1 Gem SB* 06 04 07.21544 +23 15 48.0401 5.54 5.02 4.15 3.47 3.02 G5III 196 0
19 V* S Lep LP* 06 05 45.5492216726 -24 11 44.028071527 9.72 8.42 6.82 4.12 1.75 M6+IIIa 98 0
20 HD 42581 Fl* 06 10 34.6152510171 -21 51 52.658021185 10.801 9.607 8.125 7.164 6.121 M1V 389 0
21 * eta Gem RG* 06 14 52.6452865329 +22 30 24.434377815 6.55 4.89 3.28 1.79 0.48 M2IIIa 240 0
22 * mu. Gem LP* 06 22 57.62686 +22 30 48.8979 6.37 4.51 2.87 1.30 -0.08 M3IIIab 363 1
23 HD 265866 PM* 06 54 48.9577150656 +33 16 05.438570309   11.47   9.650   M3V 176 0
24 BD+05 1668 PM* 07 27 24.49975 +05 13 32.8332 12.558 11.443 9.872 8.699 7.161 M3.5V 329 0
25 * ups Gem PM* 07 35 55.3506173748 +26 53 44.711452380 7.54 5.60 4.06 2.82 1.91 M0III 191 0
26 * sig Gem RS* 07 43 18.7269793 +28 53 00.642191 6.38 5.41 4.29 3.37 2.79 K1IIIe 442 0
27 * kap Gem ** 07 44 26.8535692 +24 23 52.787227 5.19 4.49 3.57 2.86 2.41 G8III-IIIb 283 0
28 * chi Gem SB* 08 03 31.0961924098 +27 47 39.703492909   6.075 4.937     K1-IIIb 99 0
29 * bet Cnc PM* 08 16 30.9210081 +09 11 07.957924 6.750 5.000 3.520 2.42 1.62 K4IIIBa0.5: 340 1
30 * sig Hya * 08 38 45.4374649 +03 20 29.170097 6.91 5.63 4.43 3.54 2.98 K1III 130 0
31 * del Cnc ** 08 44 41.0992106 +18 09 15.503395 6.01 5.02 3.94 3.16 2.62 K0+IIIb 187 0
32 HD 79210 Fl* 09 14 22.7754519714 +52 41 11.792840757   9.388   6.8   K7V 246 0
33 HD 79211 Fl* 09 14 24.6830609365 +52 41 10.906120364   7.966   6.8   M0V 229 0
34 * alf Lyn PM* 09 21 03.3007431 +34 23 33.224546 6.63 4.69 3.14 1.91 1.01 K6III 195 0
35 * kap Leo ** 09 24 39.2587397 +26 10 56.364971 7.00 5.69 4.46 3.55 2.92 K2IIIb 130 0
36 HD 82734 * 09 33 12.4599037254 -21 06 56.600257136   6.027 5.003     K0III 84 0
37 * 10 LMi RS* 09 34 13.3814384371 +36 23 51.216307794   5.47 4.60     G7.5IIIb 140 0
38 HD 88230 Fl* 10 11 22.1400209197 +49 27 15.249158750 9.23 7.94 6.61 5.36 4.56 K6VeFe-1 419 0
39 * mu. UMa SB* 10 22 19.7397659 +41 29 58.269105 6.53 4.64 3.05 1.76 0.80 M0III 290 0
40 BD+01 2447 PM* 10 28 55.5513010331 +00 50 27.601817738 12.389 11.151 9.650 8.617 7.389 M2.0Ve 253 0
41 BD+39 2376 PM* 10 45 21.4867878709 +38 30 42.303786920   10.72   9.026   K7/M0V 79 0
42 V* DM UMa RS* 10 55 43.5440100939 +60 28 09.722249634   10.31 9.29     K0III-IV 152 0
43 * 56 Leo LP? 10 56 01.4689991 +06 11 07.327524 8.45 7.24 5.78 3.53 1.44 M5.5III: 160 0
44 * 58 Leo ** 11 00 33.6475277060 +03 37 02.989587907   6.007 4.838     K0.5IIIFe-0.5 149 0
45 HD 95735 Fl* 11 03 20.19400 +35 58 11.5682 10.030 8.960 7.520 5.99 4.79 M2+V 616 1
46 * nu. UMa * 11 18 28.7366424 +33 05 39.510697 6.44 4.89 3.49 2.43 1.73 K3-III: 185 0
47 * 61 UMa PM* 11 41 03.0159358291 +34 12 05.882438337 6.31 6.08 5.34 4.73 4.38 G8V 562 0
48 V* II Hya LP* 11 48 45.0831243 -26 44 59.203936 8.38 6.71 5.11     M4+III 91 0
49 V* HU Vir RS* 12 13 20.6903303051 -09 04 46.844857323   9.69 8.71   7.639 K1V 136 0
50 HD 111631 PM* 12 50 43.5668069413 -00 46 05.267056898 11.187 9.892 8.470 7.59 6.752 M0V 198 0
51 * 31 Com Ro* 12 51 41.9190038520 +27 32 26.568320838 5.81 5.61 4.94 4.39 4.04 G0IIIp 409 1
52 * del Vir RG* 12 55 36.2086058 +03 23 50.893225 6.76 4.97 3.38 1.86 0.53 M3+III 255 0
53 * 40 Com LP* 13 06 22.6024454119 +22 36 58.261906251 8.82 7.22 5.61 3.63 1.84 M5III: 101 0
54 V* SW Vir AB* 13 14 04.3908742003 -02 48 25.155302846 9.24 8.52 6.85     M7III: 242 0
55 V* R Hya Mi* 13 29 42.7818674 -23 16 52.774679 7.26 6.58 4.97 2.27 -0.15 M6-9e 459 0
56 * ups Boo PM* 13 49 28.6407858 +15 47 52.460283 7.46 5.59 4.07 2.87 2.00 K5.5III 133 0
57 V* BY Boo LP? 14 07 55.7560046 +43 51 16.025944 8.52 6.86 5.28 3.43 1.77 M4.5III 165 0
58 * rho Boo PM* 14 31 49.7896173 +30 22 17.178087 6.33 4.89 3.59 2.67 2.02 K3-III 242 0
59 HD 131977 BY* 14 57 28.0008928545 -21 24 55.726897561 7.89 6.83 5.72 4.74 4.19 K4V 446 0
60 * del Boo PM* 15 15 30.1629518 +33 18 53.392558 5.12 4.44 3.49 2.76 2.25 G8IIIFe-1 355 0
61 * 12 Oph BY* 16 36 21.4492997704 -02 19 28.512485729 7.00 6.55 5.77 5.13 4.74 K1V 444 0
62 HD 160346 SB* 17 39 16.9163262 +03 33 18.875718   7.48   5.9   K3-V 268 0
63 V* XY Lyr LP* 18 38 06.4763629762 +39 40 05.966301677 9.09 7.67 6.05 3.84 1.88 M4.5-M5+II 117 0
64 * del02 Lyr LP* 18 54 30.2833502 +36 53 55.013331 7.62 5.97 4.30 2.52 0.89 M4II 218 0
65 * 13 Lyr LP* 18 55 20.1022285 +43 56 45.931489 7.00 5.59 4.00 1.95 0.04 M5III 299 0
66 V* V1762 Cyg RS* 19 08 25.7904391348 +52 25 32.630339536   6.982 5.893     K1IV 196 0
67 * alf Vul PM* 19 28 42.3299553 +24 39 53.652455 7.77 5.95 4.45 3.24 2.27 M0.5IIIb 170 0
68 * e Aql V* 19 30 39.8360572 -02 47 19.994380 8.83 6.78 5.03     K5III 56 0
69 * sig Dra PM* 19 32 21.5902990 +69 39 40.234737 5.860 5.460 4.680 4.04 3.63 K0V 575 0
70 * gam Sge PM* 19 58 45.4286265 +19 29 31.728079 6.97 5.04 3.47 2.27 1.35 M0-III 239 0
71 HD 199178 Ro* 20 53 53.6522297846 +44 23 11.078229740   7.98 7.24     G5III-IV 197 1
72 * 61 Cyg A BY* 21 06 53.9396100677 +38 44 57.897024357 7.50 6.39 5.21 4.19 3.54 K5V 936 0
73 * 61 Cyg B Fl* 21 06 55.2640651855 +38 44 31.362140913 8.63 7.40 6.03 4.86 3.55 K7V 664 1
74 * 2 Peg * 21 29 56.8954513 +23 38 19.817036   6.088 4.509     M1+III 101 0
75 * bet Peg LP* 23 03 46.45746 +28 04 58.0336 6.05 4.09 2.42 0.92 -0.40 M2.5II-III 577 0
76 * lam And RS* 23 37 33.8426114 +46 27 29.337984 5.54 4.84 3.82 3.04 2.47 G8IVk 639 0
77 HD 224085 RS* 23 55 04.0516465022 +28 38 01.248194500 8.88 8.20   6.9   K2+IVeFe-1 675 0

    Equat.    Gal    SGal    Ecl

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2020.01.28-17:57:46

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