J/A+A/379/162 Binaries with post-T Tauri secondaries (Gerbaldi+, 2001)
Binary systems with post-T Tauri secondaries
Gerbaldi M., Faraggiana R., Balin N.
<Astron. Astrophys. 379, 162 (2001)>
=2001A&A...379..162G 2001A&A...379..162G
ADC_Keywords: Stars, pre-main sequence ; Stars, early-type ; Stars, ages ;
Stars, masses ; Effective temperatures ; Photometry, uvby, beta
Keywords: binaries: visual - stars: evolution -
stars: fundamental parameters (temperature, luminosity, age, mass) -
Hertzsprung-Russel (HR) diagram - stars: pre-main sequence
Description:
File table2 contains the values of the color indices: (b-y), m1, c1,
Hβ, from the Stroemgren photometry and the observational errors
on these indices as given by the Hauck and Mermiliod (1998, Cat.
II/215). The values of Teff and logg are obtained from the Moon &
Dworetsky (1985MNRAS.217..305M 1985MNRAS.217..305M) calibration to which we have
implemented the corrections by Castelli (1991A&A...251..106C 1991A&A...251..106C). The
errors on the parameters Teff and logg, as explained in section 3.3,
are the consequence of the observational error on the photometric
indices; SigmaTeff is the total error, on Teff, computed as explained in
section 3.3.
File table5 contains the values of the parallax, the error on the
parallax, the Teff and the luminosity for the early-type star and late
type star of each visual binary system. The errors on the Teff and on
the luminosity are taken into account to compute for each of these
parameters its minimum and maximum value.
File table7 gives the values of the ages and masses computed for the
early-type stars from the Schaller et al. (1993, Cat. J/A+AS/96/269)
isochrones and Meynet at al. (1993A&AS...98..477M 1993A&AS...98..477M) models and from the
Girardi et al. (2000, Cat. J/A+AS/141/371) models. The errors on the
Teff and the luminosity are used to compute the minimum and the
maximum values for the age and the mass. The last two columns concern
only the primary stars with a Teff greater than 15000K for which we
also compute the age and the mass using as Teff value: (Teff-500K);
500K corresponds to the systematic shift between Teff derived by using
different photometric system (see Sect. 3.3).
File table9 gives the values of the ages and masses computed for the
late-type components from the isochrones and evolutionary tracks by
D'Antona et al. (1998, web page, http://www.mporzio.astro.it/~dantona/ )
Palla and Stahler (1999ApJ...525..772P 1999ApJ...525..772P), Siess et al.
(2000A&A...358..593S 2000A&A...358..593S) and Tout et al. (1999MNRAS.310..360T 1999MNRAS.310..360T). When
possible, the minimum and the maximum values of these parameters are
given by taking into account the errors on the Teff and on the
luminosity.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 84 37 Teff and log g for early-type stars and errors
table5.dat 118 39 Teff, luminosity and errors for early and
late-type stars
table7.dat 113 37 Ages, masses and errors for the early-type stars
table9.dat 114 39 Ages, masses and errors for the late-type stars
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See also:
http://www.mporzio.astro.it/~dantona : Francesca D'Antona Home Page
J/A+AS/96/269 : Stellar Models from 0.8 to 120M☉ (Schaller+, 1992)
J/A+AS/141/371 : Low-mass stars evolutionary tracks+isochrones (Girardi+ 2000)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number
8- 10 A3 --- Comp1 Early-type star component of the HD binary
12- 17 F6.3 mag b-y (b-y) colour index
19- 23 F5.3 mag e_b-y ? Observational error on (b-y)
25- 29 F5.3 mag m1 m1 colour index
31- 35 F5.3 mag e_m1 ? Observational error on m1
37- 42 F6.3 mag c1 c1 colour index
44- 48 F5.3 mag e_c1 ? Observational error on c1
50- 54 F5.3 mag Beta Beta index
56- 60 F5.3 mag e_Beta ? Observational error on Beta
62- 66 I5 K Teff Effective temperature
68- 70 I3 K e_Teff Error on Teff
72- 74 I3 K SigmaTeff Total error on Teff
76- 79 F4.2 [cm/s2] logg Gravity surface
81- 84 F4.2 [cm/s2] e_logg ? Error on logg
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP Identification in Hipparcos Catalogue
8- 12 F5.2 mas Plx Parallax in milliarcsec
14- 17 F4.2 mas e_Plx Error on the parallax in milliarcsec
19- 24 I6 --- HD HD number
26- 28 A3 --- Comp1 Early-type star of the HD binary
30- 34 F5.3 [K] log(Teff)1 Early-type star effective temperature
36- 40 F5.3 [K] log(Teff+E)1 Early-type star Teff plus the total error
on it
42- 46 F5.3 [K] log(Teff-E)1 Early-type star Teff minus the total error
on it
48- 52 F5.3 [K] log(Teff-500) ? Early-type star Teff minus 500K,
54- 58 F5.3 [solLum] log(L)1 Early-type star luminosity
60- 64 F5.3 [solLum] log(L+E)1 Early-type star luminosity plus the total
error on it
66- 70 F5.3 [solLum] log(L-E)1 Early-type star luminosity minus the total
error on it
72- 77 I6 --- --- HD number (repetition)
79- 80 A2 --- Comp2 Late-type star of the HD binary
81- 85 F5.3 [K] log(Teff)2 ? Late-type star effective temperature
87- 91 F5.3 [K] log(Teff+E)2 ? Late-type star Teff plus the total error
on it
93- 97 F5.3 [K] log(Teff-E)2 ? Late-type star Teff minus the total
error on it
99-104 F6.3 [solLum] log(L)2 ? Late-type star luminosity
106-111 F6.3 [solLum] log(L+E)2 ? Late-type star luminosity plus the total
error on it
113-118 F6.3 [solLum] log(L-E)2 ? Late-type star luminosity minus the
total error on it
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number
8- 10 A3 --- Comp1 Early-type star component of the HD binary
12- 18 E7.1 yr Age1 ? Age from Schaller at al. (1993,
Cat. J/A+AS/96/269) isochrones
19 A1 --- n_Age1 [-Z] Note on Age1 (1)
21- 27 E7.1 yr Agemin1 ? Age minimum from Schaller et al. (1993,
Cat. J/A+AS/96/269) isochrones
28 A1 --- n_Agemin1 [-Z*] Note on Agemin1 (1)
30- 36 E7.1 yr Agemax1 ? Age maximum from Schaller et al. (1993,
Cat. J/A+AS/96/269) isochrones
37 A1 --- n_Agemax1 [-*] Note on Agemax1 (1)
39- 42 F4.1 solMass Mass1 ? Mass, from Meynet et al.
(1993A&AS...98..477M 1993A&AS...98..477M) evolutionary tracks
43 A1 --- n_Mass1 [-] Note on Mass1 (1)
45- 48 F4.1 solMass Massmin1 ? Mass minimum, from Meynet et al.
(1993A&AS...98..477M 1993A&AS...98..477M) evolutionary tracks
49 A1 --- n_Massmin1 [-*] Note on Massmin1 (1)
51- 54 F4.1 solMass Massmax1 ? Mass maximum, from Meynet et al.
(1993A&AS...98..477M 1993A&AS...98..477M) evolutionary tracks
55 A1 --- n_Massmax1 [-*] Note on Massmax1 (1)
57- 63 E7.1 yr Age2 ? Age from Girardi et al. (2000,
Cat. J/A+AS/141/371) isochrones
64 A1 --- n_Age2 [-Z] Note on Age2 (1)
66- 72 E7.1 yr Agemin2 ? Age minimum from Girardi et al. (2000,
Cat. J/A+AS/141/371) isochrones
73 A1 --- n_Agemin2 [-Z*] Note on Agemin2 (1)
75- 81 E7.1 yr Agemax2 ? Age maximum from Girardi et al. (2000,
Cat. J/A+AS/141/371) isochrones
82 A1 --- n_Agemax2 [-Z*] Note on Agemax2 (1)
84- 87 F4.1 solMass Mass2 ? Mass, from Girardi et al. (2000,
Cat. J/A+AS/141/371) evolutionary tracks
88 A1 --- n_Mass2 [-] Note on Mass2 (1)
90- 93 F4.1 solMass Massmin2 ? Mass minimum, from Girardi et al. (2000,
Cat. J/A+AS/141/371) evolutionary tracks
94 A1 --- n_Massmin2 [-*] Note on Massmin2 (1)
96- 99 F4.1 solMass Massmax2 ? Mass maximum, from Girardi et al. (2000,
Cat. J/A+AS/141/371) evolutionary tracks
100 A1 --- n_Massmax2 [-*] Note on Massmax2 (1)
102-108 E7.1 yr Age3 ? Age from Schaller et al. (1993,
Cat. J/A+AS/96/269) isochrones with a
value of the temperature equal. to
(Teff - 500K)
110-113 F4.1 solMass Mass3 ? Mass, from Meynet et al.
(1993A&AS...98..477M 1993A&AS...98..477M) evolutionary tracks
with a value of the temperature equal. to
(Teff - 500K)
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Note (1): Notes:
Z: ZAMS. The label "ZAMS" indicates a star located at the very
beginning of an isochrone, so no age can be given.
*: No determined value when the age determination is ambiguous
when the star position in the HR diagram corresponds to the end
of the main sequence phase and so the star is located in a region
where evolutionary tracks overlap.
-: No determined value when no age or mass could be given due to the
position of the star in the HR diagram.
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number
8 A1 --- Comp2 Late-type star component of the HD binary
10- 16 E7.1 yr Age1 ? Age from D'Antona et al. isochrones (1998,
http://www.mporzio.astro.it/~dantona/ )
17 A1 --- n_Age1 [*] *: No data (1)
19 A1 --- l_Agemin1 Limit flag on Agemin1
20- 26 E7.1 yr Agemin1 ? Age minimum from D'Antona et al. isochrones
1998, http://www.mporzio.astro.it/~dantona/
27 A1 --- n_Agemin1 [*] *: No data (1)
29- 35 E7.1 yr Agemax1 ? Age maximum from D'Antona et al. isochrones
1998, http://www.mporzio.astro.it/~dantona/
36 A1 --- n_Agemax1 [M*] M: MS, *: No data (1)
38 A1 --- l_Agemax1 Limit flag on Agemax1
39- 45 E7.1 yr Age2 ? Age from Palla and Stahler
(1999ApJ...525..772P 1999ApJ...525..772P) isochrones
46 A1 --- n_Age2 [*M] M: MS, *: No data (1)
48 A1 --- l_Agemin2 Limit flag on Agemin2
49- 55 E7.1 yr Agemin2 ? Age minimum from Palla and Stahler
(1999ApJ...525..772P 1999ApJ...525..772P) isochrones
56 A1 --- n_Agemin2 [*] *: No data (1)
58- 64 E7.1 yr Agemax2 ? Age maximum from Palla and Stahler
(1999ApJ...525..772P 1999ApJ...525..772P) isochrones
65 A1 --- n_Agemax2 [M*] M: MS, *: No data (1)
67- 73 E7.1 yr Age3 ? Age from Siess et al. (2000A&A...358..593S 2000A&A...358..593S)
isochrones
74 A1 --- n_Age3 [*] *: No data (1)
76- 82 E7.1 yr Age4 ? Age from Tout et al. (1999MNRAS.310..360T 1999MNRAS.310..360T)
isochrones
83 A1 --- n_Age4 [*] *: No data (1)
85- 88 F4.2 solMass Mass2 ? Mass from Palla and Stahler
(1999ApJ...525..772P 1999ApJ...525..772P) evolutionary tracks
89 A1 --- n_Mass2 [*] *: No data (1)
91- 94 F4.2 solMass Massmin2 ? Mass minimum from Palla and Stahler
(1999ApJ...525..772P 1999ApJ...525..772P) evolutionary tracks
95 A1 --- n_Massmin2 [*] *: No data (1)
97-100 F4.2 solMass Massmax2 ? Mass maximum from Palla and Stahler
(1999ApJ...525..772P 1999ApJ...525..772P) evolutionary tracks
101 A1 --- n_Massmax2 [*] *: No data (1)
103-106 F4.2 solMass Mass3 ? Mass from Siess et al.
(2000A&A...358..593S 2000A&A...358..593S) evolutionary tracks
107 A1 --- n_Mass3 [*] *: No data (1)
109-112 F4.2 solMass Mass4 ? Mass from Tout et al. (1999MNRAS.310..360T 1999MNRAS.310..360T)
evolutionary tracks
113 A1 --- n_Mass4 [*] *: No data (1)
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Note (1): the symbols are:
*: No computation could be done, due to the position of the star in
the HR diagram.
MS: The characters "MS" correspond to a star located on the main
sequence or when one of the error bar crosses it.
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Acknowledgements: Michele Gerbaldi
(End) Patricia Bauer [CDS] 21-Sep-2001