1994PASP..106.1248G


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.25CET07:53:35

1994PASP..106.1248G - Publ. Astron. Soc. Pac., 106, 1248-1257 (1994/December-0)

Spectral line-depth ratios as temperature indicators for cool stars.

GRAY D.F.

Abstract (from CDS):

The use of spectral line-depth ratios as a stellar thermometer in G and K dwarfs is developed and refined beyond an earlier study (Gray and Johnson 1991). Ratios incorporating a line with any degree of saturation, as with the lambda-6252 V I to lambda-6253 Fe I ratio used in the 1991 work, produce metallicity dependent results. This dependence is investigated here, and a correction derived. Ten line-depth ratios using only weak lines are shown to have negligible metallicty dependence and resolve temperature differences as small as 6 K for early K dwarfs from a single exposure having a signal-to-noise ratio of 500. Precision deteriorates badly toward G0 for these particular spectral lines. Smaller temperature differences can be resolved by combining exposures. Relative temperatures of 65 dwarfs are given, a few having errors near 1 K. Inconsistencies ∼50 K between temperatures derived from color indices and from spectral lines are most likely a result of interstellar reddening affecting the photometry.

Abstract Copyright:

Journal keyword(s):

Simbad objects: 65

goto Full paper

goto View the reference in ADS

Number of rows : 65

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * 85 Peg SB* 00 02 10.3411392575 +27 04 54.476788744 6.47 6.42 5.75 5.16 4.73 G5VbFe-2 527 0
2 * 54 Psc PM* 00 39 21.8055114029 +21 15 01.716052732 7.29 6.71 5.88 5.21 4.82 K0.5V 532 1
3 HD 4628 PM* 00 48 22.9763438736 +05 16 50.209562003 7.22 6.64 5.74 4.99 4.52 K2.5V 452 0
4 * eta Cas PM* 00 49 06.2907161 +57 48 54.675740 4.04 4.02 3.44 2.94 2.58 F9V+M0-V 601 0
5 * mu. Cas SB* 01 08 16.39470 +54 55 13.2264 5.93 5.86 5.17 4.55 4.13 G5Vb 546 1
6 * 44 And PM* 01 10 18.7400278961 +42 04 53.309286343   6.249 5.665     F8V 171 0
7 * 107 Psc PM* 01 42 29.7634932653 +20 16 06.660242064 6.57 6.08 5.24 4.55 4.12 K1V 510 0
8 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1105 1
9 HD 16160 PM* 02 36 04.9023844802 +06 53 12.431588708   6.81   5.2   K3V 488 1
10 * tet Per PM* 02 44 11.9870420 +49 13 42.411120 4.62 4.62 4.11 3.67 3.37 F8V 383 0
11 HD 17925 RS* 02 52 32.1281853696 -12 46 10.970649463 7.48 6.91 6.05 5.34 4.89 K1V 475 0
12 * iot Per PM* 03 09 04.0198629 +49 36 47.799638 4.76 4.64   3.7   G0V 505 0
13 * kap01 Cet BY* 03 19 21.6963205 +03 22 12.715139 5.71 5.52 4.85 4.27 3.91 G5V 827 0
14 * eps Eri BY* 03 32 55.8449634 -09 27 29.731165 5.19 4.61 3.73 3.00 2.54 K2V 1720 1
15 * 10 Tau PM* 03 36 52.1448022536 +00 23 58.536917738 5.23 5.15 4.30 4.09 3.77 F9IV-V 526 0
16 HD 29645 PM* 04 41 50.2558302559 +38 16 48.653863947   6.56   5.6   F9IV-V 121 0
17 * gam Lep PM* 05 44 27.7908940 -22 26 54.180763 4.08 4.07 3.60 3.15 2.89 F6V 397 0
18 * chi01 Ori RS* 05 54 22.9829893 +20 16 34.222038 5.08 5.00 4.40 3.90 3.59 G0V 803 0
19 HD 43587 SB* 06 17 16.1298959119 +05 05 59.915616770 6.400 6.290   5.3   G0V 216 0
20 HD 45067 PM* 06 25 16.5464141963 -00 56 45.178168018   6.43 5.90     F9V 175 0
21 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1766 0
22 * pi.01 UMa BY* 08 39 11.7043265307 +65 01 15.268273190 6.33 6.26 5.64 5.12 4.79 G0.5V 524 0
23 HD 78366 PM* 09 08 51.0705427688 +33 52 55.988119240   6.53   5.6   G0IV-V 219 0
24 * 15 LMi PM* 09 48 35.3713005275 +46 01 15.633773390 5.80 5.72 5.10 4.57 4.23 G0.5Va 285 0
25 * 20 LMi PM* 10 01 00.6567799273 +31 55 25.216848499   6.02   4.9   G3VaHdel1 353 0
26 HD 88737 PM* 10 14 29.7522465320 +21 10 04.975693602       5.7   F9V 119 0
27 HD 89744 PM* 10 22 10.5623067078 +41 13 46.308754730       5.4   F7V 303 1
28 * 36 UMa PM* 10 30 37.5803678549 +55 58 49.936416690       4.5   F8V 300 1
29 * 47 UMa PM* 10 59 27.9738644892 +40 25 48.922388918   5.66   4.7   G1-VFe-0.5 719 1
30 HD 97334 BY* 11 12 32.3505448605 +35 48 50.691547084   7.02   6.0   G2 257 0
31 * 88 Leo ** 11 31 44.9446108040 +14 21 52.213131158   6.77   5.9   F9.5V 174 0
32 * 61 UMa PM* 11 41 03.0159358291 +34 12 05.882438337 6.31 6.08 5.34 4.73 4.38 G8V 570 0
33 * bet Vir PM* 11 50 41.7182390 +01 45 52.991019 4.26 4.15 3.60 3.13 2.85 F9V 859 0
34 * bet CVn ** 12 33 44.5448195 +41 21 26.924857 4.91 4.86 4.25 3.73 3.42 G0V 544 0
35 * bet Com PM* 13 11 52.3937856 +27 52 41.453553 4.92 4.84 4.25 3.77 3.47 F9.5V 850 0
36 * e Vir PM* 13 16 46.5161591991 +09 25 26.967205938   5.81   4.8   G0V 507 1
37 * 61 Vir PM* 13 18 24.3142756 -18 18 40.304648 5.710 5.440 4.740     G6.5V 599 1
38 * 70 Vir PM* 13 28 25.8081883620 +13 46 43.642951116 5.930 5.680 4.970 4.37 3.98 G4Va 675 1
39 * ksi Boo BY* 14 51 23.37993 +19 06 01.6994 5.618 5.370 4.593 3.91 3.48 G7Ve+K5Ve 436 0
40 * lam Ser PM* 15 46 26.6144291449 +07 21 11.041647444 5.13 5.03 4.42 3.92 3.60 G0-V 536 0
41 * chi Her PM* 15 52 40.5411372117 +42 27 05.451105113 5.19 5.19 4.62 4.14 3.82 F8VFe-2Hdel-1 479 0
42 * gam Ser PM* 15 56 27.1826948 +15 39 41.820500 4.31 4.34 3.84 3.37 3.13 F6V 533 0
43 * rho CrB PM* 16 01 02.6608052290 +33 18 12.642245533   6.01   5.0   G0+VaFe-1 586 1
44 * 18 Sco PM* 16 15 37.2703721200 -08 22 09.981989277   6.15 5.50     G2Va 493 0
45 * 12 Oph BY* 16 36 21.4492997704 -02 19 28.512485729 7.00 6.55 5.77 5.13 4.74 K1V 453 0
46 * h Dra SB* 16 56 01.6892483 +65 08 05.263139   5.37   4.6   F8V 191 0
47 V* V2213 Oph BY* 17 05 16.8186294192 +00 42 09.217571716   6.59   5.6   F8.5IV-V 318 0
48 HD 156826 PM* 17 19 59.5534551301 -05 55 03.024890688   7.17 6.32     K0V 75 0
49 * w Her PM* 17 20 39.5675395123 +32 28 03.877348066 6.08 6.01 5.39 4.89 4.56 G0V 424 0
50 HD 159332 PM* 17 33 22.8243446706 +19 15 24.035756757   6.130 5.648     F4V 126 0
51 * 26 Dra SB* 17 34 59.59363 +61 52 28.4006 5.950 5.830   4.8   F9V+K3V 244 0
52 HD 166620 PM* 18 09 37.4162810870 +38 27 27.995921559 7.86 7.27 6.40 5.63 5.14 K2V 395 0
53 * sig Dra PM* 19 32 21.5902990 +69 39 40.234737 5.860 5.460 4.680 4.04 3.63 K0V 586 0
54 * 16 Cyg A ** 19 41 48.9539315338 +50 31 30.218780803 6.79 6.59 5.95 5.50 5.17 G1.5Vb 679 1
55 * 16 Cyg B PM* 19 41 51.9731830550 +50 31 03.086127222 7.07 6.86 6.20 5.76 5.42 G3V 801 1
56 * 17 Cyg PM* 19 46 25.5997765489 +33 43 39.342745085   5.46   4.7   F5.5IV-V 251 0
57 * omi Aql PM* 19 51 01.6437560393 +10 24 56.595177367   5.66   4.8   F8V 425 0
58 * 15 Sge PM* 20 04 06.2209062328 +17 04 12.677429047   6.390 5.788 5.4   G0V 341 0
59 HD 193664 PM* 20 17 31.3282807419 +66 51 13.281593047   6.51   5.6   G3V 178 0
60 HD 197076 PM* 20 40 45.1407864181 +19 56 07.928511642 7.14 7.06 6.44 5.95 5.61 G5V 222 0
61 * 61 Cyg A BY* 21 06 53.9396100677 +38 44 57.897024357 7.50 6.39 5.21 4.19 3.54 K5V 952 0
62 V* HN Peg BY* 21 44 31.3299733695 +14 46 18.982331039       6.16   G0V+ 455 0
63 HD 210855 PM* 22 11 48.7663918184 +56 50 21.674533513   5.75   4.9   F8V 114 0
64 * 34 Peg SB* 22 26 37.3705884794 +04 23 37.605589572   6.37 5.81 5.4   F7V 137 0
65 * 51 Peg Ro* 22 57 27.9804167474 +20 46 07.782240714 6.39 6.16 5.46 4.97 4.61 G2IV 1080 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 1994PASP..106.1248G and select 'bookmark this link' or equivalent in the popup menu


2020.11.25-07:53:35

© Université de Strasbourg/CNRS

    • Contact