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9 papers · 2 filters
The Mdot - M* relation of pre-main sequence stars: a consequence of X-ray driven disc evolution
B. Ercolano, D. Mayr, J. E. Owen +2
We analyse current measurements of accretion rates onto pre-main sequence stars as a function of stellar mass, and conclude that the steep dependance of accretion rates on stellar…
Testing protoplanetary disc dispersal with radio emission
James E. Owen, Anna M. M. Scaife, Barbara Ercolano
We consider continuum free-free radio emission from the upper atmosphere of protoplanetary discs as a probe of the ionized luminosity impinging upon the disc. Making use of previou…
Herschel Reveals Massive Cold Clumps in NGC 7538
C. Fallscheer, M. A. Reid, J. Di Francesco +29
We present the first overview of the Herschel observations of the nearby high-mass star-forming region NGC 7538, taken as part of the Herschel imaging study of OB Young Stellar obj…
Hall equilibria with toroidal and poloidal fields: application to neutron stars
K. N. Gourgouliatos, A. Cumming, A. Reisenegger +3
We present solutions for Hall equilibria applicable to neutron star crusts. Such magnetic configurations satisfy a Grad-Shafranov-type equation, which is solved analytically and nu…
Evolutionary constraints on the planetary hypothesis for transition discs
C. J. Clarke, J. E. Owen
We assume a scenario in which transition discs (i.e. discs around young stars that have signatures of cool dust but lack significant near infra-red emission from warm dust) are ass…
On WD-WD Mergers in Triple Systems: The Role of Kozai Resonance with Tidal Friction
Snezana Prodan, Norman Murray, Todd A. Thompson
White dwarf-white dwarf (WD-WD) mergers may lead to type Ia supernovae events. Thompson (2011) suggested that many such binaries are produced in hierarchical triple systems. The te…