2014MNRAS.444.2525C


Query : 2014MNRAS.444.2525C

2014MNRAS.444.2525C - Mon. Not. R. Astron. Soc., 444, 2525-2543 (2014/November-1)

Improving PARSEC models for very low mass stars.

CHEN Y., GIRARDI L., BRESSAN A., MARIGO P., BARBIERI M. and KONG X.

Abstract (from CDS):

Many stellar models present difficulties in reproducing basic observational relations of very low mass stars (VLMS), including the mass-radius relation and the optical colour-magnitudes of cool dwarfs. Here, we improve parsec (PAdova-TRieste Stellar Evolution Code) models on these points. We implement the T-τ relations from phoenix BT-Settl model atmospheres as the outer boundary conditions in the parsec code, finding that this change alone reduces the discrepancy in the mass-radius relation from 8 to 5 per cent. We compare the models with multiband photometry of clusters Praesepe and M67, showing that the use of T-τ relations clearly improves the description of the optical colours and magnitudes. But anyway, using both Kurucz and phoenix model spectra, model colours are still systematically fainter and bluer than the observations. We then apply a shift to the above T-τ relations, increasing from 0 at Teff = 4730 K to ∼ 14 per cent at Teff = 3160 K, to reproduce the observed mass-radius relation of dwarf stars. Taking this experiment as a calibration of the T- τ relations, we can reproduce the optical and near-infrared colour-magnitude diagrams of low-mass stars in the old metal-poor globular clusters NGC 6397 and 47 Tuc, and in the intermediate-age and young solar-metallicity open clusters M67 and Praesepe. Thus, we extend parsec models using this calibration, providing VLMS models more suitable for the lower main-sequence stars over a wide range of metallicities and wavelengths. Both sets of models are available on parsec webpage.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): stars: evolution - Hertzsprung-Russell and colour-magnitude diagrams - stars: low-mass

Simbad objects: 95

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Number of rows : 95
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3747 0
2 CD-39 325 EB* 01 13 28.164576 -38 21 02.65032   13.17 11.72 11.38 9.693 M1V+M3V 36 0
3 V* UV Psc EB* 01 16 55.1191752816 +06 48 42.131407176   9.73 9.01   8.223 G5(N) 249 0
4 LP 588-25 EB* 01 38 51.4094210303 -00 16 21.889258632     18.14     M6V 26 0
5 GSC 05288-01027 SB* 02 39 08.7519084456 -10 27 46.433176920     13.20     K7 22 0
6 V* V881 Per EB* 02 59 53.1133417008 +38 01 47.983784772   10.7 11.09 10.34   ~ 12 0
7 2MASS J03262072+0312362 EB* 03 26 20.7332788080 +03 12 36.343146636           ~ 18 0
8 LP 54-19 SB* 03 37 14.0817987048 +69 10 49.779443244   15.5   13.991   M3.8+M4.4 54 0
9 V* RR Cae WD* 04 21 05.5631820426 -48 39 07.061113433 14.50 14.92 14.40     DA7.8 144 1
10 2MASS J04463285+1901432 EB* 04 46 32.8622247312 +19 01 43.246330320   19.9 19.0     M 24 0
11 CRTS J044809.6+031748 EB* 04 48 09.6325927344 +03 17 48.087994560     15.06 15.76   ~ 18 0
12 GSC 06465-00602 ** 04 48 23.3159534736 -24 50 16.879808400   14.052 13.605     ~ 9 0
13 1RXS J045304.1-070011 EB* 04 53 04.4274771144 -07 00 23.506395984   11.99 11.13   10.284 K2V+K4/M4V 21 0
14 V* HP Aur EB* 05 10 21.7819906416 +35 47 46.620438936   11.85 11.17     G0 88 2
15 V* V1174 Ori Or* 05 34 27.8529220296 -05 41 37.875014808 16.506 15.070 14.305   12.367 M0 51 0
16 TYC 6493-290-1 ** 05 40 46.1693610648 -24 55 35.178948912   12.79 12.058     ~ 8 0
17 GSC 06493-00315 ** 05 42 49.1144333592 -25 59 47.445947592   13.580 13.114     ~ 10 0
18 GSC 05946-00892 ** 06 16 00.6523000536 -21 15 23.830926408   13.694 13.189     ~ 5 0
19 V* HS Aur EB* 06 51 18.4766820936 +47 40 24.176766540   10.85 10.05     G5(N) 86 0
20 V* YY Gem BY* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 842 0
21 2MASS J07431157+0316220 EB* 07 43 11.5724519136 +03 16 22.101307392       16.02   ~ 16 0
22 NSVS 7394765 EB* 08 25 51.8920686720 +24 27 04.604802912           ~ 11 0
23 V* CU Cnc SB* 08 31 37.5741841080 +19 23 39.398029332   12.83 11.809 11.592   M5Ve 211 0
24 NGC 2632 OpC 08 40 13 +19 37.3           ~ 1418 0
25 NGC 2682 OpC 08 51 23 +11 48.8           ~ 2202 0
26 SDSS J085746.18+034255.3 ** 08 57 46.1848948032 +03 42 55.352826180           DA+M 25 0
27 V* ZZ UMa EB* 10 30 03.1946894976 +61 48 41.430038256   10.43 9.83     F8 72 0
28 2MASS J10305521+0334265 EB* 10 30 55.2108147768 +03 34 26.723215200           ~ 18 0
29 V* V746 Car EB* 10 51 09.2127653856 -61 43 11.616595320     17.276   16.23 ~ 10 0
30 V* V750 Car EB* 10 52 20.6645744952 -61 29 45.441152196         15.76 ~ 9 0
31 V* V764 Car EB* 10 53 51.1166673312 -61 34 13.644573348     17.71   16.53 ~ 22 0
32 V* V783 Car EB* 10 57 51.8344468224 -61 43 58.834463808     16.431   15.82 ~ 13 0
33 V* V796 Car EB* 10 59 41.5134006792 -61 55 15.606483168     16.24   15.45 ~ 15 0
34 V* V816 Car EB* 11 06 51.0923613144 -61 11 10.465836036     16.161 16.07 15.05 FV+MV 30 1
35 V* V817 Car EB* 11 06 51.8853827760 -60 51 45.902051712     16.809   15.61 ~ 33 1
36 V* V821 Car EB* 11 07 53.3473687680 -61 04 18.418576260     16.996   15.94 ~ 7 0
37 FBS 1109+767 EB* 11 12 42.3396641760 +76 26 56.387535288   16.1   14.8   M4V 49 0
38 SDSS J121258.25-012310.1 ** 12 12 58.2526059240 -01 23 10.195008864           DA+dMe 36 0
39 V* IM Vir EB* 12 49 38.6982565560 -06 04 44.864911128   10.34 9.69   8.834 G5/6V 73 0
40 FBS 1345+796 EB* 13 45 34.8710774664 +79 23 48.290145432     13.363 13.074   M4/5 40 0
41 LP 133-373 EB* 14 04 08.8829131392 +50 20 38.642975844   16.3   15.2   ~ 19 0
42 V* GK Vir ** 14 15 36.4128319176 +01 17 18.226779000   17.0       DAe+M 98 0
43 V* V636 Cen EB* 14 16 57.9122377992 -49 56 42.372930480   9.70 9.09     G0V 92 0
44 HD 128510 EB* 14 35 54.4924244592 +46 35 36.759607980   10.72 10.25     G 8 0
45 * alf Cen ** 14 39 29.71993 -60 49 55.9990   0.4 -0.1     G2V+K1V 898 0
46 V* GU Boo EB* 15 21 54.8243257728 +33 56 09.067285032     13.11     M0/M1.5 91 0
47 V* CV Boo SB* 15 26 19.5363381672 +36 58 53.433780492   11.61 10.99     G3V(N) 76 0
48 UCAC3 127-192903 EB* 16 23 28.395 -26 30 21.88 17.57 17.931 17.028 15.90 15.01 ~ 11 0
49 [KTR2013] V66 EB* 16 23 32.26 -26 31 41.1 17.71 17.621 16.843 16.20 15.64 ~ 12 0
50 UGCS J162358.09-263719.0 EB* 16 23 58.1038205040 -26 37 19.080464340 17.93 17.913 17.011 16.43 15.81 ~ 12 0
51 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 425 0
52 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 1892 1
53 NGC 6398 GiG 17 42 43.7799919296 -61 41 39.191849484   13.45   12.35   ~ 14 0
54 HD 173701 PM* 18 44 35.1191008536 +43 49 59.790008892   8.37 7.52     G8V 152 0
55 BD+43 3102 Ro* 18 51 39.5934542496 +43 38 09.727323360   10.10 9.44     G5V 53 0
56 BD+44 3020 PM* 18 56 14.3076037320 +44 31 05.389610412   10.45 9.77     G8V 109 1
57 Kepler-95 Ro* 18 57 55.7883819888 +44 23 52.818842400           G5V 72 0
58 [DCO2008] T-Lyr1-01662 SB* 18 59 02.8573447224 +48 36 35.561671020   11.87 11.65 11.525   F3V 13 0
59 HD 176693 Ro* 18 59 08.6844743448 +48 25 23.600359776   9.34 8.83     F8V 109 0
60 Kepler-25 Ro* 19 06 33.2141354736 +39 29 16.358725104   11.32 10.77 10.598   ~ 134 1
61 Kepler-1 Er* 19 07 14.0375836512 +49 18 59.091482160   11.85 11.25     G0V 163 2
62 V* FL Lyr EB* 19 12 04.8624983832 +46 19 26.867864388   9.91 9.36     F8V 200 0
63 Kepler-103 Ro* 19 15 56.2939334304 +40 03 52.285818168   12.68 11.88     G5Ib 75 0
64 Kepler-16 EB* 19 16 18.1758378936 +51 45 26.782726104   12.1   11.90   K7V 225 1
65 HD 181068 EB* 19 17 08.9786734416 +41 15 53.314415820   8.01 7.09     G8III+G8V+K1V 60 0
66 TYC 3121-1659-1 EB* 19 19 03.7076172192 +38 40 56.760362868   12.36 12.42     ~ 12 0
67 V* V568 Lyr EB* 19 20 57.3346763352 +37 45 36.739962972   18.295   16.823   ~ 42 0
68 Kepler-109 Ro* 19 21 34.2534438336 +40 17 05.498443284   12.82 12.93     G4V 70 0
69 KOI-362 EB* 19 23 59.2554767856 +37 11 57.177016728       13.78   ~ 33 2
70 BD+48 2893 Ro* 19 24 07.7659706688 +49 02 24.928348272   10.73 10.08     G1V 112 1
71 Kepler-100 Ro* 19 25 32.6432787456 +41 59 24.945100548   11.86 11.06     ~ 96 0
72 BD+38 3583 Ro* 19 25 40.3885404552 +38 40 20.413186860   10.73 10.00     G5V 94 0
73 2MASS J19265907+0029061 EB* 19 26 59.0803024320 +00 29 06.220432644   17.092 16.049 15.670 14.934 F+D 9 0
74 Kepler-406 Ro* 19 27 23.5375431360 +44 58 05.726111052           G5IV 57 0
75 2MASS J19324321+3636534 EB* 19 32 43.2164760600 +36 36 53.426480940           M2.3 10 0
76 2MASS J19341550+3628271 EB* 19 34 15.5139159504 +36 28 27.159650544           M2.7 12 0
77 BD+46 2726 Ro* 19 34 43.0022454096 +46 51 09.938179044   10.36 9.64     K0V 107 0
78 2MASS J19350355+3631165 EB* 19 35 03.5536693080 +36 31 16.532966172           M 13 0
79 BD+44 3183 PM* 19 35 50.5739000112 +44 52 50.022974316   9.38 8.92     G0IV 52 0
80 2MASS J19364065+3642460 EB* 19 36 40.656 +36 42 46.04           M2.8 10 0
81 KOI-6667 EB* 19 37 06.9719575320 +41 26 12.766884504           G5V 32 0
82 BD+44 3197 PM* 19 37 54.5252033200 +44 59 04.630621506       9.3   G0IV 66 0
83 TYC 3556-3445-1 PM* 19 40 21.2108930904 +45 29 20.963746392   10.48 9.91     G3V 62 0
84 KOI-126 EB* 19 49 54.2016372336 +41 06 51.428433708           ~ 93 1
85 HD 190166 PM* 20 01 51.4248305136 +44 21 14.147515008   10.13 9.58     F8V 48 0
86 2MASS J20115132+0337194 EB* 20 11 51.3220884384 +03 37 19.425256500       16.02   ~ 16 0
87 1SWASP J201521.94+481714.1 EB* 20 15 21.9407295936 +48 17 14.073844524   11.55 10.95 10.600   ~ 9 0
88 BD+34 4217 EB* 20 58 13.4532832464 +35 10 29.672620140     10.13     G9.5Ve+K3Ve 259 0
89 V* V1061 Cyg EB* 21 07 20.5201575864 +52 02 58.418010528   9.78 9.21     F8 76 0
90 V* VZ Cep EB* 21 50 11.1350311248 +71 26 38.249750076   10.19 9.72     F3+G4 45 0
91 V* RW Lac SB* 22 44 57.1033105152 +49 39 27.512902116   11.23 10.81     F2 71 0
92 1SWASP J230808.34+333803.9 EB* 23 08 08.3429939160 +33 38 03.955818408   11.23 10.66     ~ 17 0
93 V* RT And RS* 23 11 10.0984058784 +53 01 33.031339248   9.58 9.043 8.73   F8V+G0-K1-3V 367 0
94 2MASS J23143816+0339493 EB* 23 14 38.1601778232 +03 39 49.367823156       16.67   ~ 21 0
95 V* AP And SB* 23 49 30.7094105544 +45 47 21.272048880   11.63 11.19     F6+F8 37 0

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2022.09.26-09:07:52

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