Possible ring material around centaur (2060) Chiron
We propose that several short-duration events observed in past stellar occultations by Chiron were produced by ring material. Some similarities between these...
Post common envelope binaries from SDSS. IV. SDSS J121258.25-012310.1, a new eclipsing system
From optical photometry we show that SDSS J121258.25-012310.1 is a new eclipsing, post common-envelope binary with an orbital period of 8.06 h and an eclipse...
Post common envelope binaries from SDSS. VIII. Evidence for disrupted magnetic braking
Context. The standard prescription of angular momentum loss in compact binaries assumes magnetic braking to be very efficient as long as the secondary star has...
Post common envelope binaries from SDSS. XII. The orbital period distribution
Context. The complexity of the common-envelope phase and of magnetic stellar wind braking currently limits our understanding of close binary evolution. Because...
Post common envelope binaries from SDSS. XIII. Mass dependencies of the orbital period distribution
Context. Post-common-envelope binaries (PCEBs) consisting of a white dwarf (WD) and a main-sequence secondary star are ideal systems to constrain models of...
Post first dredge-up [C/N] ratio as age indicator. Theoretical calibration
We performed a detailed analysis of the use of [C/N] measured in red giant branch stars between the completion of the first dredge up and the red giant branch...
Power spectra comparison between GOLF and spatially masked MDI velocity signals
The Global Oscillations at Low Frequency (GOLF) and the Michelson Doppler Imager (MDI) instruments aboard the Solar and Heliospheric Observatory (SOHO) give an...
Pre-main sequence spectroscopic binaries suitable for VLTI observations
Context: A severe problem for research in star-formation is that the masses of young stars are almost always estimated from evolutionary tracks alone. Since the...