Low-mass X-ray binaries (LMXB) are stellar systems where a neutron star or a black hole accretes mass from a low-mass ($\lesssim$ 1M$_\odot$) donor star. A...
Accretion Disk Lifetimes and Stellar Rotation Periods for Young Stars in NGC 2264
We present the initial results of a study aimed at: (1) determining the lifetime of the disk accretion phase among low mass pre-main sequence stars; (2)...
Accretion onto Neutron Stars: States and State Transitions
About 150 weakly magnetic neutron stars are known to accrete matter from low-mass stars in neutron star low-mass X-ray binaries (NS-LMXBs). Accretion in these...
Accretion-induced variability of interacting red giant binaries masquerading as oscillations
Symbiotic stars are strongly interacting binaries with long orbital periods, containing an evolved red giant and a white dwarf or a neutron star embedded in a...
Accretion-Triggered Starbursts in Tadpole Galaxies
Gas accretion onto galaxies is believed to drive the average star formation rate. However, there are few observations of this accretion for late-type galaxies...
Accurate and Deep Wide Field Photometry: The Stellar Perspective
We discuss how a wide field imager with very high spatial resolution on a relatively small telescope but located in an observing site with very good seeing...
Accurate Mapping of the Torsional Oscillations: a Trade-Off Study between Time Resolution and Mode Characterization Precision
One salient result of global helioseismology is the mapping of the so-called torsional oscillations below the solar surface. These subsurface flows are inferred...