J/A+A/335/647 Limb-darkening coefficients for ubvyUBVRIJHK (Claret 1998)
Very low mass stars: non-linearity of the limb-darkening laws
Claret A.
<Astron. Astrophys. 335, 647 (1998)>
=1998A&A...335..647C 1998A&A...335..647C
ADC_Keywords: Binaries, eclipsing ; Models, atmosphere
Keywords: stars: atmospheres - stars: binaries: eclipsing -
stars: low mass, brown dwarfs
Abstract:
Linear and non-linear limb-darkening coefficients for the photometric
bands u v b y U B V R I J H K are computed for very low effective
temperatures stars. The atmosphere models used (PHOENIX-NextGen) do
not include the effects of dust formation and dust opacities. These
calculations are presented for the first time . The calculations
extend the range of effective temperatures (2000K-50000K) covered by
our previous papers. These data are important in order to deal with
stars in the lower part of Main-Sequence like M or brown dwarfs. The
non-linear behavior of the limb-darkening laws, particularly in this
effective temperature range, is emphasized and we urge users to take
it into account.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 95 140 Linear (u) limb-darkening coefficients
table2.dat 95 280 Quadratic (a, b) limb-darkening coefficients
table3.dat 95 280 Square root (c, d) limb-darkening coefficients
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See also:
J/A+A/401/657 : New non-linear limb-darkening law. II. (Claret, 2003)
J/A+A/363/1081 : Non-linear limb-darkening law for LTE models (Claret 2000)
J/A+AS/109/441 : Stellar models until He burning - I. (Claret, 1995)
J/A+AS/114/549 : Stellar models until He burning - II. (Claret+, 1995)
J/A+AS/125/439 : Stellar models until He burning - III. (Claret+, 1997)
J/A+AS/110/329 : LTE model atmospheres coeff. (Diaz-cordoves+, 1995)
J/A+AS/114/247 : Limb-darkening coefficients for RIJHK (Claret+, 1995)
Byte-by-byte Description of file: table1.dat table2.dat table3.dat
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Bytes Format Units Label Explanations
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1 A1 --- Coeff [uabcd] Limb-darkening coefficient (1)
3- 6 F4.2 [cm/s2] logg Surface gravity
8- 11 I4 K Teff [2000/9800]+= Effective temperature
13- 18 F6.3 --- u Limb-darkening coefficient (Filter u)
20- 25 F6.3 --- v Limb-darkening coefficient (Filter v)
27- 32 F6.3 --- b Limb-darkening coefficient (Filter b)
34- 39 F6.3 --- y Limb-darkening coefficient (Filter y)
41- 46 F6.3 --- U Limb-darkening coefficient (Filter U)
48- 53 F6.3 --- B Limb-darkening coefficient (Filter B)
55- 60 F6.3 --- V Limb-darkening coefficient (Filter V)
62- 67 F6.3 --- R Limb-darkening coefficient (Filter R)
69- 74 F6.3 --- I Limb-darkening coefficient (Filter I)
76- 81 F6.3 --- J Limb-darkening coefficient (Filter J)
83- 88 F6.3 --- H Limb-darkening coefficient (Filter H)
90- 95 F6.3 --- K Limb-darkening coefficient (Filter K)
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Note (1): u for linear, (a, b) for quadratic and (c, d) for square root
limb-darkening coefficients
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Acknowledgements: Antonio Claret Dos Santos
(End) Patricia Bauer [CDS] 16-Jun-1998