We present intermediate resolution spectroscopy of the dwarf nova CY UMa in quiescence. From the radial velocities of the Hα emission, we derive an orbital...
The orbital period of the recurrent nova V2487 Oph revealed
We present the first reliable determination of the orbital period of the recurrent nova V2487 Oph (Nova Oph 1998). We derived a value of 0.753 ± 0.016 d (18.1 ±...
The orbital period of the recurrent X-ray transient in Terzan 6
Four or five new outbursts were detected of the bright X-ray transient GRS 1747-312 in the globular cluster Terzan 6 between 1996 and 1999, through monitoring...
The orbital period of V458 Vulpeculae, a post-double common-envelope nova
We present time-resolved optical spectroscopy of V458 Vulpeculae (Nova Vul 2007 No. 1) spread over a period of 15 months starting 301d after its discovery. Our...
The orbital period, black hole mass, and distance to the X-ray transient GRS 1716-249 ( =N Oph 93)
We present evidence for a 0.278(8) d ( =6.7 h) orbital period in the X-ray transient GRS 1716-249 (=N Oph 93), based on a superhump modulation detected during...
The Orbital Phases and Secondary Transits of Kepler-10b. A Physical Interpretation Based on the Lava-ocean Planet Model
The Kepler mission has made an important observation: the first detection of photons from a terrestrial planet by observing its phase curve (Kepler-10b). This...
The Orientation of Disk Galaxies around Large Cosmic Voids
Using a large sample of galaxies from the the seventh data release of the Sloan Digital Sky Survey (SDSS-DR7), we have analyzed the alignment of disk galaxies...
The orientation of galaxy dark matter haloes around cosmic voids
Using the Millennium N-body Simulation we explore how the shape and angular momentum of galaxy dark matter haloes surrounding the largest cosmological voids are...
THE ORIENTATION OF LUGDUNUM CONUENARUM AND THE CELTIC FEASTS MARKING THE START OF THE SEASONS IN ANCIENT GAUL
There is a long-lasting debate, started in the nineteenth century by d‟Arbois de Jubainville and Jullian, among others, regarding the pan-Celtic nature of the...