Recurrent novae are star systems in which a massive white dwarf accretes material at such high rate that it undergoes thermonuclear runaways every 1 - 100 years. They the only class of can grow mass, making some these strong Type Ia supernova progenitor candidates. Almost all known recurrent long-period (P_orb > 12 hrs) binary requisite mass supply be provided by an evolved (sub-)giant donor st...

Since the discovery of hypervelocity stars in 2005, it has been widely believed that only disruption a binary system by supermassive black hole at Galactic center (GC), is, so-called Hills mechanism, is capable accelerating to beyond escape velocity. In meantime, however, driven Gaia space mission, there mounting evidence many most extreme high-velocity early-type high latitudes do originate di...

Abstract Rice is a keystone crop in all Maroon communities Suriname and French Guyana today they cultivate hundreds of traditional varieties. Historically, rice can be considered an indicator for successful marronnage the Guianas. Unraveling local variety names reveal history, farming systems, spiritual significance probably diversity communities. We interviewed 67 farmers (96% female), collect...

We present one of the first physically-motivated two-dimensional general relativistic magnetohydrodynamic (GRMHD) numerical simulations of a radiatively-cooled black-hole accretion disk. The fiducial simulation combines a total-energy-conserving formulation with a radiative cooling function, which includes bremsstrahlung, synchrotron, and Compton effects. By comparison with other simulations we...

44 VOLUME 1, NUMBER 2, APRIL 1992 other highly mobile, disadvantaged children without added resources. Researchers have an important role to play in providing information to guide policy and evaluate programs. Although a number of studies have been conducted and more are under way, there are major gaps in the knowledge base. Little is known about the processes leading to or out of homelessness ...

The GPS meteorology (GPS/MET) experiment, led by the Universities Corporation for Atmospheric Research (UCAR), consists of a GPS receiver aboard a low earth orbit (LEO) satellite which was launched on 3 April 1995. During a radio occultation the LEO satellite rises or sets relative to one of the 24 GPS satellites at the Earth's horizon. Thereby the atmospheric layers are successively sounded by...

We present the results of ASCA and RXTE observations of the early X-ray emission from the classical nova V382 Velorum. Its ASCA spectrum was hard (kT∼10 keV) with a strong (10 cm) intrinsic absorption. In the subsequent RXTE data, the spectra became softer both due to a declining temperature and a diminishing column. We argue that this places the X-ray emission interior to the outermost ejecta ...

Proper motions measured by Hipparcos confirm the large anomalous velocities of the OB associations located around the Cygnus Superbubble (Cygnus OB1, OB3, OB7, and OB9), and reveal a clearly organized expanding pattern in Canis MajorOB1.At the distances of these associations, the organized velocity patterns imply LSR velocities of up to ∼ 60 km s−1 for the associations in Cygnus, and about ∼ 15...

Electric vehicles (EVs) are or automobiles that utilise a single several electric-based motors, battery packs and collector systems for propulsion. With the paradigm shift to green electricity, EVs considered major technological innovations could mitigate GHG emissions from transportation. Despite their potential, have numerous problems ranging thermal runaways electric shocks fire explosions. ...

The article provides an annotated list of new floristic finds in the flora Middle Dnieper (on territory Cherkasy region, as well adjacent districts Kyiv and Poltava regions), both aboriginal rare alien species, including “runaways from culture”. In some cases, notes are given on taxonomic status, features natural range, ancient indications localities certain species region. For first time, 31 t...