Recycled Pulsars

by Bryan Anthony Jacoby

We present the results of a large-area survey for millisecond pulsars (MSPs) at moderately high galactic latitudes with the 64 m Parkes radio telescope, along with follow-up timing and optical ...

The Many Facets of Cosmic Explosions

by Alicia Margarita Soderberg

Over the past few years, long-duration gamma-ray bursts (GRBs), including the subclass of X-ray flashes (XRFs), have been revealed to be a rare variety of Type Ibc supernova (SN Ibc). While all ...

Lyman Alpha Emitting Galaxies at High Redshift

Direct Detection of Young Galaxies in a Young Universe

by Steven Arthur Dawson

As late as 1995, the anticipated widespread population of primeval galaxies remained at large, lurking undetected at unknown redshifts, with undiscovered properties. We present results from our ...

The Properties of Star-Forming Galaxies at z~2

Kinematics, Stellar Populations, and Metallicities

by Dawn K. Erb

We study the properties of star-forming galaxies at redshift z~2, an era in which a substantial fraction of the stellar mass in the universe formed. Using 114 near-IR spectra of the H-alpha and [N ...

High Angular Resolution Studies of the Structure and Evolution of Protoplanetary Disks

by Joshua A. Eisner

Young stars are surrounded by massive, rotating disks of dust and gas, which supply a reservoir of material that may be incorporated into planets or accreted onto the central star. In this ...

Brown Dwarf Companions to Young Solar Analogs

An Adaptive Optics Survey Using Palomar and Keck

by Metchev, Stanimir A.

We present results from an adaptive optics survey conducted with the Palomar and Keck telescopes over 3 years, which measured the frequency of stellar and sub-stellar companions to Sun-like stars. ...

The Diversity of Neutron Stars

Nearby Thermally Emitting Neutron Stars and the Compact Central Objects in Supernova Remnants

by David L. Kaplan

Neutron stars are invaluable tools for exploring stellar death, the physics of ultra-dense matter, and the effects of extremely strong magnetic fields. The observed population of neutron stars is ...

Cosmic Explosions

The Beasts and Their Lair

by Edo Berger, Ph.D.

The diversity of stellar death is revealed in the energy, velocity and geometry of the explosion debris ("ejecta''). Using multi-wavelength observations of gamma-ray burst (GRB) afterglows I show ...