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J/A+A/311/873       Geneva Photometry of HD 34798 & HD 45284 (Waelkens+, 1996)
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The slowly pulsating B stars HD 34798 and HD 45284.
     Waelkens C.
    <Astron. Astrophys. 311, 873 (1996)>
    =1996A&A...311..873W      (SIMBAD/NED BibCode)
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ADC_Keywords: Stars, B-type ; Photometry, Geneva
Keywords: stars: early-type - stars: individual: HD 34798 -
          stars: individual: HD 45284 - stars: oscillations

Abstract:
    We discuss the period analysis of two variable mid-B stars that have
    been observed in the Geneva photometric system between 1981 and 1990.
    Both HD 34798 and HD 45284 are multiperiodic g-mode pulsators that
    belong to the group of slowly pulsating B stars. The power spectrum of
    HD 34798 is characterized by several modes which have about equal
    power. This star belongs to a visual binary, the other component of
    which is a singly periodical CP star. Quasi-simultaneous observations
    of both stars are discussed and turn out to be helpful to illustrate
    the multiperiodic behavior of HD 34798. Three oscillation modes with a
    nearly stable amplitude are found; the remaining variability may be
    due to two very close oscillation modes, or, alternatively, to one
    mode with an intrinsically variable amplitude. Three oscillation
    frequencies can be distinguished clearly in the power spectrum of HD
    45284. The beat periods for this star are the shortest for any SPB
    detected so far, and therefore make HD 45284 an excellent candidate
    for verification of our results and for asteroseimological follow-up.

Objects:
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       RA   (2000)  DE      Name
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       05 19 17.42  -18 31 12.3  HD 34798
       06 26 13.14  -07 21 41.3  HD 45284
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File Summary:
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  FileName      Lrecl  Records   Explanations
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ReadMe             80        .   This file
table              62      554   Photometric data
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See also:
    GCPD/13 : definition of the Geneva 7-colour photometric system.

Byte-by-byte Description of file: table
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   Bytes Format Units   Label     Explanations
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   1-  8  A8    ---     Name      Star name
  10- 20  F11.3 d       HJD       Heliocentric Julian day
  22- 26  F5.3  mag     Vmag      V magnitude
  28- 32  F5.3  mag     [U-B]     U-B colour
  34- 38  F5.3  mag     [V-B]     V-B colour
  40- 44  F5.3  mag     [B1-B]    B1-B colour
  46- 50  F5.3  mag     [B2-B]    B2-B colour
  52- 56  F5.3  mag     [V1-B]    V1-B colour
  58- 62  F5.3  mag     [G-B]     G-B colour
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(End)                                        Patricia Bauer [CDS]    1996-Feb-01