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J/A+A/311/873       Geneva Photometry of HD 34798 & HD 45284 (Waelkens+, 1996)

The slowly pulsating B stars HD 34798 and HD 45284. Waelkens C. <Astron. Astrophys. 311, 873 (1996)> =1996A&A...311..873W (SIMBAD/NED BibCode)
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: ------------------------------------------ RA (2000) DE Name ------------------------------------------ 05 19 17.42 -18 31 12.3 HD 34798 06 26 13.14 -07 21 41.3 HD 45284 ------------------------------------------ File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table 62 554 Photometric data
See also: GCPD/13 : definition of the Geneva 7-colour photometric system. Byte-by-byte Description of file: table
Bytes Format Units Label Explanations
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

(End) Patricia Bauer [CDS] 1996-Feb-01
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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