Free Access
Astron. Astrophys. Suppl. Ser.
Volume 128, Number 2, March I 1998
Page(s) 265 - 275
Published online 15 March 1998
DOI: 10.1051/aas:1998140

A&A Supplement series, Vol. 128, Mars I 1998, 265-275

Received March 26; accepted July 21, 1997

CP2 stars as viewed by the tex2html_wrap_inline489 systemgif

E. Masana tex2html_wrap517 - C. Jordi tex2html_wrap517 - H.M. Maitzen tex2html_wrap521 - J. Torra tex2html_wrap517

Send offprint request: E. Masana e-mail:

tex2html_wrap525  Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Avda. Diagonal 647, E-08028 Barcelona, Spain
tex2html_wrap527  Institut für Astronomie, Universität Wien, Türkenschanzstratex2html_wrap_inline491e 17, A-1180 Wien, Austria


The aim of this work is to study the capacity of the tex2html_wrap_inline495 system for detecting the chemically peculiar (CP) stars based on the effect that peculiar features in the flux distribution have on all the Strömgren-Crawford indices.

Our study focuses on the classical magnetic peculiar stars (CP2), though Am stars (CP1) are also included for comparison with cool CP2 stars. Satisfactory results were obtained for hot CP2 stars: the definition of a new index p, which is a linear combination of tex2html_wrap_inline495 colours, allowed us to separate a high percentage of hot CP2 stars from normal stars. According to this new index, 60 new CP2 candidates are proposed.

The working sample was extracted from The General Catalogue of Ap and Am stars by Renson et al. (1991). Photometric observations to enlarge the sample of CP2 stars with complete tex2html_wrap_inline495 photometry were carried out. These observations are also reported in the present paper.

The new index p is also used to correct the reddening of early CP2 stars computed as if they were normal stars.

keywords: stars: chemically peculiar -- stars: fundamental parameters -- stars: early type

SIMBAD Objects
Tables at the CDS

Copyright by the European Southern Observatory (ESO)

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