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HD 125891


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Multiperiodicities from the Hipparcos epoch photometry and possible pulsation in early A-type stars
A selection criterion based on the relative strength of the largestpeaks in the amplitude spectra, and an information criterion are used incombination to search for multiperiodicities in Hipparcos epochphotometry. The method is applied to all stars which have beenclassified as variable in the Hipparcos catalogue: periodic, unsolvedand microvariables. Results are assessed critically: although there aremany problems arising from aliasing, there are also a number ofinteresting frequency combinations which deserve further investigation.One such result is the possible occurrence of multiple periods of theorder of a day in a few early A-type stars. The Hipparcos catalogue alsocontains a number of these stars with single periodicities: such starswith no obvious variability classifications are listed, and informationabout their properties (e.g., radial velocity variations) discussed.These stars may constitute a new class of pulsators.

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Observation and Astrometry data

Constellation:Centaurus
Right ascension:14h23m25.58s
Declination:-41°40'26.1"
Apparent magnitude:8.46
Distance:287.356 parsecs
Proper motion RA:-8.6
Proper motion Dec:-9.1
B-T magnitude:9.994
V-T magnitude:8.587

Catalogs and designations:
Proper Names
HD 1989HD 125891
TYCHO-2 2000TYC 7813-2721-1
USNO-A2.0USNO-A2 0450-17468259
HIPHIP 70335

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