HD 73431

UvbyHbeta_ photometry of main sequence A type stars. We present Stroemgren uvby and Hbeta_ photometry for a set of575 northern main sequence A type stars, most of them belonging to theHipparcos Input Catalogue, with V from 5mag to 10mag and with knownradial velocities. These observations enlarge the catalogue we began tocompile some years ago to more than 1500 stars. Our catalogue includeskinematic and astrophysical data for each star. Our future goal is toperform an accurate analysis of the kinematical behaviour of these starsin the solar neighbourhood.
HD 72968 /3 Hya/ - Another low amplitude photometric double wave AP star Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978A&A....62..199M&db_key=AST
UVBY photometry of AP stars : the nature of the light variations. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1971AJ.....76..422W&db_key=AST

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