Bibcode
Catalano, F. A.; Leone, F.; Kroll, R.
Bibliographical reference
Astronomy and Astrophysics Supplement, v.131, p.63-72
Advertised on:
7
1998
Citations
13
Refereed citations
11
Description
Twelve magnetic Chemically Peculiar (CP2) stars of the SiSrCrEu subgroup
mostly brighter than the 7.5 visual magnitude have been investigated in
the infrared at 1.25, 1.6 and 2.2 mu . The stars HD 74521, HD 90044, HD
119419, HD 125630, and HD 187473 are clearly variable in the near
infrared with the same period as the visible light, spectrum, and
magnetic field variations. The stars HD 10783, HD 12447, HD 116458, HD
147010, HD 166469, HD 170397, and HD 223640 do show a smaller amount of
variability, although with quite large a dispersion of the data. A
remarkable result of the present investigation is that, at least for the
stars for which contemporaneous observations are available, the observed
infrared variations appear to be in phase with the variations in the
long wavelength part of the visible. This may be an indication that the
mechanism of the infrared variations should be the same as for the
visible. Based on observations collected at the European Southern
Observatory, La Silla, Chile.