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...
Possible satellite perspective effects on the reported correlations between solar activity and clouds
Recently some correlations between low cloud cover and solar activity have been reported in the literature. In this paper we show how the flux of GCR is found...
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...
Post maximum light and late time optical imaging polarimetry of type I superluminous supernova 2020znr
Optical imaging polarimetry was conducted on the hydrogen poor superluminous supernova 2020znr during three phases after maximum light (≍ +34 d, +288 d, and...