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J/A+AS/114/363      Polarization profiles of H lines    (Casini 1995)
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Coefficients for calculating the second-order moments of the polarization
profiles of hydrogen lines
     Casini R.
    <Astron. Astrophys. Suppl. Ser. 114, 363 (1995)>
    =1995A&AS..114..363C      (SIMBAD/NED BibCode)
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ADC_Keywords: Atomic physics ; Polarization
Keywords: polarization - line: formation - atomic processes - atomic data

Description:
    In this paper we provide extensive tables of the coefficients that are
    needed in the calculation of the second-order moments of the
    polarization profiles of hydrogen lines. We cover all the transitions
    up to the level n=50, which is enough for many astrophysical
    applications. We also provide formulae which allow the calculation of
    the line and oscillator strengths and of the Einstein coefficients for
    the tabulated transitions.

File Summary:
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  FileName      Lrecl  Records   Explanations
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ReadMe             80        .   This file
table             114     1225   Coefficients needed in the calculation of
                                 the second-order moments of the Stokes profiles
                                 of optically-thin, emission hydrogen lines +
                                 other related coefficients
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Byte-by-byte Description of file: table
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   Bytes Format  Units   Label      Explanations
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   2-  3  I2     ---       n        First principal quantum number
   5-  6  I2     ---       m        Second  principal quantum number
   8- 25  E18.12 Ry+2      Omk2(0)  Fine-structure contribution to the
                                    second-order moment of the intensity
                                    profile (1)
  28- 46  F19.11 ---       A0(n,m)  First electric coefficient (2)
  53- 71  F19.11 ---       A2(n,m)  Second electric coefficient (3)
  77- 94  E18.12 Ry        Om       Center-of-gravity frequency of the
                                    intensity profile in the absence of
                                    external fields (4)
  96-113  E18.12 ---       Sum      Sum of the strengths of the line-components
                                    (in units of a0^2, where a0 is the radius
                                    of Bohr's first orbit) (5)
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Note (1): Defined in Casini et al. 1994, Eqs. (9) and (10)
Note (2): Defined in Casini et al. 1994, Eq. (14); see also Casini 1995, Eq. (4)
Note (3): Defined in Casini et al. 1994, Eq. (14)
Note (4): Defined in Casini et al. 1994, Eqs. (12) and (10)
Note (5): Defined in Casini 1995, Eq. (2); 
	  a0=h^2^/(4{pi}^2^m_e_ e^2^)=0.5291775x10^-10^m
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References:
   Casini R., Landi Degl'Innocenti E., 1994, "Properties of the second-order
    moments of the polarization profiles of hydrogen lines", 
    =1994A&A...291..668C
   Casini R., 1995, "Coefficients for calculating the second-order moments
    of the polarization profiles of hydrogen lines" (this paper)
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(End)                                            Simona Mei [CDS]   12-Jul-1995