J/A+AS/133/1 J/A+AS/133/1 New variable chemically peculiar stars E Paunzen H M Maitzen Astron. Astrophys. Suppl. Ser. 133 1 1998 1998A&AS..133....1P III/162 : General Catalogue of Ap and Am stars (Renson+ 1991) III/199 : Observed Periods of Ap and Bp stars (Catalano+ 1998) I/196 : Hipparcos Input Catalogue, Version 2 (Turon+ 1993) J/A+AS/121/57 : Ap stars periodicity (Catalano+ 1997) J/A+AS/128/573 : ubvy{Delta}a photometry of Renson stars (Maitzen+ 1998) Rotational velocities Stars, peculiar Stars, variable stars: chemically peculiar stars: early-type stars: variables: general Since variability of chemically peculiar (CP) stars plays an important role for the astrophysical explanation of their outstanding behaviour, we have identified new variable CP stars listed in Renson's catalogue using the extensive Hipparcos Variability Annex. From the 293 objects found, 33 were excluded because they are not CP stars and/or have no period listed, half of the remaining stars are newly identified and half had been already included in the catalogue of variable CP stars by Catalano & Renson (1997, Cat. <J/A+AS/121/57>). Most of the newly identified variability is due to an apparent magnetic field coupled with stellar rotation (oblique rotator model). The constraints of this model are fulfilled for all but three CP2 stars. Variations of bona fide Am-Fm stars are exclusively explained by eclipses of binary systems. Furthermore eight candidates of the gamma Doradus group (pulsating Am-Fm stars) were detected. Table 1 (table1.dat) presents the newly identified chemically peculiar stars.

HD HD number with probability mark according to Renson (1991) --- n_HD Probability mark according to Renson (1991, Cat. <III/162>) number=1 Indication of the probability that the star belongs to the considered category: '/' denotes a star improperly considered Ap or Am '?' doubtful nature '*' well-known Ap or Am star ' ' other cases --- HIC HIC (Cat. <I/196>) number --- RNS Number from Renson (1991, Cat. <III/162>) --- Type Type of variations --- Min Minimum of the variations mag l_Max Limit flag on Max --- Max Maximum of the variations mag Period Period of the variations d Epoch Epoch as in the HVA (Hipparcos Variability Annex) d Deltaa {Delta}a index number=2 {Delta}a is a photometric index that measure the intensity of the depression at {lambda}5200{AA}. All stars with {Delta}a>=0.010mag are considered as peculiar stars. See Maitzen et al., 1976A&A....51..223M, for more details. mmag Deltap {Delta}p index number=3 {Delta}p is a photometric index, depending of (b-y), m_1_, c_1_ and {beta} photometry, able to detect CP2 stars. See Masana et al., Cat. <J/A+AS/128/265>, for more details. --- l_vsini Limit flag on vsini --- vsini vsini value km/s Spec Spectral type according to Renson (1991, Cat. <III/162>)) --- Patricia Bauer CDS 1998Oct01E. Paunzen <PAUNZEN@astro.ast.univie.ac.at> J_A+AS_133_1.xml