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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
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:

       FileName      Lrecl  Records   Explanations

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


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

   Bytes Format Units   Label     Explanations

       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)

Note (1): u for linear, (a, b) for quadratic and (c, d) for square root
           limb-darkening coefficients


Acknowledgements: Antonio Claret Dos Santos 

(End)                                          Patricia Bauer [CDS]  16-Jun-1998