76 citations · 76 across the 1 of their papers we have counts for
5 papers · 1 filter
Quasi-periodic oscillations as global hydrodynamic modes in the boundary layers of viscous accretion disks
M. Hakan Erkut, Dimitrios Psaltis, M. Ali Alpar
The observational characteristics of quasi-periodic oscillations (QPOs) from accreting neutron stars strongly indicate the oscillatory modes in the innermost regions of accretion d…
On the X-Ray Light Curve, Pulsed-Radio Emission, and Spin Frequency Evolution of the Transient Anomalous X-Ray Pulsar Xte J1810--197 During its X-Ray Outburst
U. Ertan, M. H. Erkut
We show that: (i) the long-term X-ray outburst light curve of the transient AXP XTE J1810-197 can be accounted for by a fallback disk that is evolving towards quiescence through a…
Anomalous X-ray pulsars: Persistent States with Fallback Disks
Unal Ertan, M. Ali Alpar, M. Hakan Erkut +2
The anomalous X-ray pulsar 4U 0142+61 was recently detected in the mid infrared bands with the SPITZER Observatory (Wang, Chakrabarty & Kaplan 2006). This observation is the first…
The Anomalous X-Ray Pulsar 4U 0142+61: A Neutron Star with a Gaseous Fallback Disk
U. Ertan, M. H. Erkut, K. Y. Eksi +1
The recent detection of the anomalous X-ray pulsar (AXP) 4U 0142+61 in the mid-infrared with the {\it Spitzer} observatory by Z.Wang and coworkers constitutes the first instance of…
On the Rotational Dynamics of Magnetically Threaded Disks around Neutron Stars
M. Hakan Erkut, M. Ali Alpar
We investigate the rotational dynamics of disk accretion around a strongly magnetized neutron star with an aligned dipole field. The magnetospheric field is assumed to thread the d…