Type-II and anomalous Cepheids in LMC (Soszynski+, 2008)

Details Type-II and anomalous Cepheids in LMC (Soszynski+, 2008) Type-II and anomalous Cepheids in LMC (Soszynski+, 2008)

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ycat.120580293s&link_type=abstract

VizieR On-line Data Catalog: J/AcA/58/293. Originally published in: 2008AcA....58..293S

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Magellanic Clouds, Stars: Variable, Magnitudes

Scientific paper

We present the period-luminosity and color-magnitude diagrams of stars in the sample. If the boundary period between BL Her and W Vir stars is adopted at 4 days, both groups differ significantly in (V-I) colors. We identify a group of 16 peculiar W Vir stars with different appearance of the light curves, brighter and bluer than ordinary stars of that type. Four of these peculiar W Vir stars show additional eclipsing modulation superimposed on the pulsation light curves. Four other stars of that type show long-period secondary variations which may be ellipsoidal modulations. It suggests that peculiar W Vir subgroup may be related to binarity. In total, we identified seven type II Cepheids simultaneously exhibiting eclipsing variations which is a very large fraction compared to classical Cepheids in the LMC.
(2 data files).

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