2000A&AS..142...13G


Query : 2000A&AS..142...13G

2000A&AS..142...13G - Astron. Astrophys., Suppl. Ser., 142, 13-24 (2000/February-2)

Magnitudes absolues des etoiles standards MK des types G a M a partir des parallaxes Hipparcos. The absolute magnitudes of the G to M type MK standards from the Hipparcos parallaxes.

GINESTET N., CARQUILLAT J.M. and JASCHEK C.

Abstract (from CDS):

We analyse a sample of about 500 MK standards of cool spectral types (G to M) for to compare the visual absolute magnitudes obtained from both Hipparcos data and Schmidt-Kaler calibrations. Our purpose is to validate our spectroscopic work (Ginestet et al., 1997A&AS..123..135G, 1999A&AS..134..473G) on stars with composite spectra with the help of Hipparcos data. Contrary to what is claimed in other papers, the absolute magnitude domain devoted to the giant stars does not overlap the domain of dwarfs. We find that the discrepancies between absolute magnitudes from Hipparcos data and absolute magnitudes deduced from Schmidt-Kaler calibrations increase with the relative error σ(π)/π on the parallaxes. So, for σ(π)/π≤0.05 only 3% of the stars present a discrepancy of one luminosity class, while this percentage reaches 54% for 0.25<σ(π)/π≤0.50. Curiously, the luminosity of the giants seems to increase with the distance of the stars, whereas the supergiants of the sample appear underluminous at least for d<600pc! We point out a list of 14 MK standards whose luminosity classes may be erroneous and need a new spectral classification, in the near infrared. The case of composite-spectrum binaries is also discussed. Most of these are too distant for accurate parallaxes even with Hipparcos: only sixteen stars have σ(π)/π≤0.10; for these, we give new spectral classifications in agreement with both our classifications in the near infrared of the cool components and Hipparcos data. Finally, for stars having high-precision parallaxes (σ(π)/π≤5%) there is no serious problem for Schmidt-Kaler calibrations whith respect to Hipparcos data. The data corresponding to parallaxes of lower precisions should be used with caution and only for statistical analyses.

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - stars: distances

Simbad objects: 54

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Number of rows : 54
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 * iot Cet * 00 19 25.6741634 -08 49 26.111055 5.94 4.77 3.55 2.70 2.11 K1+IIICN0.5 174 0
2 * tau Per EB* 02 54 15.4777208304 +52 45 44.882735292 5.17 4.71 3.96 3.33 2.89 G8III+A7V 162 0
3 * gam Per EB* 03 04 47.7907410 +53 30 23.168725 4.08 3.63 2.93 2.34 1.89 G9III+A2-III: 205 0
4 HD 20084 PM* 03 32 20.1347090088 +84 54 39.764690712   6.501 5.609     G5IIFe-1CH2Ba1: 75 0
5 HD 23838 SB* 03 50 04.4251512960 +44 58 04.328639760   6.417 5.657     G7III+F0IV: 65 0
6 HR 1230 ** 04 10 02.74737 +80 41 55.2485           G8III+A3.5IV: 68 0
7 HD 27022 * 04 20 40.3256358240 +65 08 25.589310792 6.55 6.08 5.27 4.63 4.20 G4III 149 0
8 HR 1771 ** 05 21 46.25452 -24 46 22.7417   5.73 5.06     G8/K0II/III+A2/3 46 0
9 * 36 Dor PM* 05 54 06.0545851778 -63 05 23.209034464   5.70 4.66     K2III-IV 101 0
10 HD 50281B ** 06 52 18.0415140183 -05 11 24.042331473   11.47 10.05 9.870   M2.5V 116 0
11 HD 50281 PM* 06 52 18.0505442698 -05 10 25.365598911   7.64 6.57     K3.5V 196 0
12 * eps Hya Ro* 08 46 46.51223 +06 25 07.6855 4.43 4.06 3.38 2.78 2.39 G1III+A8V 255 0
13 * alf Hya * 09 27 35.24270 -08 39 30.9583 5.14 3.42 1.97 0.93 0.16 K3IIIa 422 0
14 HD 81817 SB* 09 37 05.2877790 +81 19 34.971143   5.736 4.255     K3II-III 95 0
15 * tet Ant ** 09 44 12.0951165 -27 46 10.101055 5.65 5.29 4.79 4.32 4.00 A7V+G8III 85 0
16 V* BZ Car LP* 10 54 06.2515015224 -62 02 32.817608412 11.90 9.89 7.71     M3+Ib 51 0
17 * 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
18 * nu. UMa * 11 18 28.7366424 +33 05 39.510697 6.44 4.89 3.49 2.43 1.73 K3-III: 197 0
19 * 93 Leo RS* 11 47 59.13595 +20 13 08.1500   5.07 4.52     F8III+A6III 217 1
20 * 12 Com SB* 12 22 30.3113907816 +25 50 46.167660348 5.56 5.30 4.81 4.34 4.01 F6III+A3V 181 0
21 V* BK Vir AB* 12 30 21.0136448232 +04 24 59.142255840 9.60 8.82 7.28     M7-III: 142 0
22 V* SV Crv LP* 12 49 47.0279775696 -15 04 44.096102724   8.60 7.08     M5-III 39 0
23 * tet Aps LP* 14 05 19.8778357 -76 47 48.320384 8.10 7.05 5.50     M6.5III: 119 0
24 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
25 * ups Vir PM* 14 19 32.4797345232 -02 15 55.858700808 7.01 6.16 5.14     G9IIICN-0.5 80 0
26 * alf Aps * 14 47 51.7120247 -79 02 41.103245   5.247 3.798     K3IIICN0.5 65 0
27 * phi01 Lup PM* 15 21 48.3696659 -36 15 40.952469   5.076 3.546     K4III 90 0
28 * 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
29 * g Dra * 16 40 55.1189266 +64 35 20.560563   6.045 4.842     K0IIICN-0.5CH-2Ca1 73 0
30 V* V636 Her LP* 16 47 19.7469474888 +42 14 20.097704616 9.07 7.48 5.87     M4.5III 64 0
31 V* BM Sco LP* 17 40 58.5463959480 -32 12 52.064356500 8.75 7.20 5.60     K2IbHdel1 77 0
32 * 84 Her PM* 17 43 21.5645208624 +24 19 40.156969404   6.394 5.729     G2IIIb 142 0
33 * del Sgr * 18 20 59.6435424 -29 49 41.165919   4.069 2.668     K2.5IIIaCN0.5 171 0
34 V* XY Lyr LP* 18 38 06.4762596528 +39 40 05.975752044 9.09 7.67 6.05 3.84 1.88 M4.5-M5+II 119 0
35 * del02 Lyr LP* 18 54 30.2833502 +36 53 55.013331 7.62 5.97 4.30 2.52 0.89 M4II 230 0
36 * 113 Her SB* 18 54 44.8849895400 +22 38 42.271489464 5.88 5.38 4.60 3.96 3.50 G8III+:+A0.5 92 0
37 * 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
38 * lam Lyr V* 19 00 00.8256630552 +32 08 43.847562840   6.401 4.930     K2.5III:Ba0.5 111 0
39 * bet01 Cyg ** 19 30 43.28052 +27 57 34.8483 4.83 4.21 3.08 2.21 1.55 K3II+B9.5V 228 0
40 * 9 Cyg SB* 19 34 50.9283781560 +29 27 46.684035828   5.96 5.407     G8III+A2III: 94 0
41 V* AC Dra LP* 20 20 06.0116763312 +68 52 49.144172700   7.14 5.55     M4.5-M5III 48 0
42 * bet01 Cap SB* 20 21 00.6665981712 -14 46 53.067367488 4.14 3.87 3.08 2.53 2.03 G9II:+B8p:Si: 175 0
43 * bet Cap ** 20 21 00.67 -14 46 53.0           ~ 165 0
44 V* EU Del LP* 20 37 54.7276970976 +18 16 06.894742044 8.42 7.38 5.89 3.24 0.97 M6III 172 0
45 HD 196819 * 20 38 17.1709204848 +42 04 25.257072432   9.32 7.55     K2.5IIb 33 1
46 V* V419 Cep LP? 21 12 47.2471655232 +60 05 52.806681744   8.95 6.62     M2Ib 54 0
47 * alf Equ SB* 21 15 49.4319197 +05 14 52.243012   4.446 3.933     G6IV+B9.5V 146 0
48 HD 204613 SB* 21 27 42.9670649688 +57 19 18.928743348       7.8   G1IIIa:_CH1.5 100 0
49 V* NV Peg LP* 21 28 59.7726880656 +22 10 45.980951448   7.31 5.95     M4.5IIIa 48 0
50 HD 214850 SB* 22 40 52.68164 +14 32 56.9765       6.76   G4V 196 0
51 * lam Peg PM* 22 46 31.8778614 +23 33 56.356140 5.93 5.00 3.93 3.16 2.66 G8IIIaCN0.5 164 0
52 * 51 Peg PM* 22 57 27.9804852576 +20 46 07.797040104 6.39 6.16 5.46 4.97 4.61 G2IV 1133 1
53 HD 221148 PM* 23 29 32.0817754272 -04 31 57.892874556   7.34 6.25     K3-IIIbFe2 134 0
54 HD 221861 * 23 34 59.0427914904 +71 38 31.359003828 9.37 7.64 5.84     G9Ib 66 0

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2023.01.28-08:13:41

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