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J/A+A/284/515       Long-term periodic variability in gamma Cas  (Telting+ 1994)
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Long-term periodic variability in UV absorption lines of the Be star gamma Cas:
on the relation with V/R variations in the Hbeta line.
     Telting J.H., Kaper L.
    <Astron. Astrophys. 284, 515 (1994)>
    =1994A&A...284..515T
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ADC_Keywords: Stars, variable; Stars, emission; Spectroscopy
Keywords: stars: emission-line, Be - circumstellar matter -
          stars: individual: gamma Cas

Abstract:
    We present a quantitative study of the variability in ultraviolet resonance
    lines of N V, Si IV and C IV of the Be star gamma Cas. For this purpose we
    used IUE spectra obtained over a period of eleven years. Variability occurs
    in the form of discrete absorption components (DACs), which are formed in 
    the fast-outflowing radiatively driven part of the stellar wind. We 
    constructed a template spectrum from spectra containing no or minor extra 
    absorption due to DACs and modeled the isolated DACs in the obtained 
    quotient spectra. Besides the frequently observed narrow components (Vt 
    typically less than or = 250 km/s) at high velocity, we found several 
    broad components occurring at low and intermediate wind velocities. 

File Summary:
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 FileName    Lrecl    Records    Explanations
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ReadMe          80          .    This file
table4         162         85    Results of fitting the model to residual
                                  spectra of gamma Cas
table4.tex     105        346    LaTex version of table4
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Byte-by-byte Description of file: table4
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   Bytes Format  Units   Label    Explanations
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   1-  5  I5     ---     Name     Image number
   7- 13  F7.1   km/s    Vc1      N V best-fitting of the Vc Discret Absorption
                                   Component (DAC) model parameter
  15- 18  F4.1   km/s    e_Vc1    rms uncertainty on Vc for N V
  20- 24  F5.3   ---     Tau_c1   N V best-fitting of the Tau_c DAC parameter
  26- 30  F5.3   ---   e_Tau_c1   rms uncertainty on Tau_c for N V
  32- 36  F5.1   km/s    Vt1      N V best-fitting of the Vt DAC parameter
  38- 41  F4.1   km/s    e_Vt1    rms uncertainty on Vt for N V
  43- 47  F5.2 10+12cm-2 Ncol1    N V column density
  49- 52  F4.2 10+12cm-2 e_Ncol1  rms uncertainty on Ncol for N V
  54- 57  F4.2   ---     Khi21    []? N V reduced Khi2 value of the best fit
  59- 65  F7.1   km/s    Vc2      Si IV best-fitting of the Vc DACparameter
  67- 70  F4.1   km/s    e_Vc2    rms uncertainty on Vc for Si IV
  72- 76  F5.3   ---     Tau_c2   Si IV best-fitting of the Tau_c DAC parameter
  78- 82  F5.3   ---   e_Tau_c2   rms uncertainty on Tau_c for Si IV
  84- 88  F5.1   km/s    Vt2      Si IV best-fitting of the Vt DAC parameter
  90- 93  F4.1   km/s    e_Vt2    rms uncertainty on Vt for Si IV
  95- 99  F5.2 10+12cm-2 Ncol2    Si IV column density
 101-104  F4.2 10+12cm-2 e_Ncol2  rms uncertainty on Ncol for Si IV
 106-109  F4.2   ---     Khi22    []? Si IV reduced Khi2 value of the best fit
 111-117  F7.1   km/s    Vc3      C IV best-fitting of the Vc DAC parameter
 119-123  F5.1   km/s    e_Vc3    rms uncertainty on Vc for C IV
 125-129  F5.3   ---     Tau_c3   C IV best-fitting of the Tau_c DAC parameter
 131-135  F5.3   ---   e_Tau_c3   rms uncertainty on Tau_c for C IV
 137-141  F5.1   km/s    Vt3      C IV best-fitting of the Vt DAC parameter
 143-146  F4.1   km/s    e_Vt3    rms uncertainty on Vt for C IV
 148-152  F5.2 10+12cm-2 Ncol3    C IV column density
 154-157  F4.2 10+12cm-2 e_Ncol3  rms uncertainty on Ncol for C IV
 159-162  F4.2   ---     Khi23    []? C IV reduced Khi2 value of the best fit
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(End)                                           Patricia Bauer [CDS] 18-Jan-1994