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20032005
most citedA direct formulation for sparse PCA using semidefinite programming

125 citations

Showing 2003 · astro-phShow all

10 papers · 2 filters

astro-ph2003

Spectropolarimetric Observations of Supernovae

Alexei V. Filippenko, Douglas C. Leonard

We briefly review the existing database of supernova spectropolarimetry, concentrating on recent data and on results from our group's research. Spectropolarimetry provides the only…

astro-ph2003

Imaging the Sunyaev Zel'dovich Effect using ACBAR on Viper

A. K. Romer, P. L. Gomez, C. M. Cantalupo +13

During 2001 and 2002, observations of several X-ray bright clusters of galaxies were conducted using the ACBAR Bolometer Array on the South Pole Viper telescope. A multi-frequency…

astro-ph2003

Observations of Type Ia Supernovae, and Challenges for Cosmology

Weidong Li, Alexei V. Filippenko

Observations of Type Ia supernovae (SNe Ia) reveal correlations between their luminosities and light-curve shapes, and between their spectral sequence and photometric sequence. Ass…

astro-ph2003

Optical, Ultraviolet, and Infrared Observations of SN 1993J

Alexei V. Filippenko, Thomas Matheson

We review the existing set of optical/UV/IR observations of Supernova 1993J, concentrating heavily on optical data because these are by far the most plentiful. Some results from th…

astro-ph20031 cited

Dark Matter in Dwarf Galaxies: Latest Density Profile Results

Joshua D. Simon, Alberto D. Bolatto, Adam Leroy +1

We present high-resolution two-dimensional velocity fields in Halpha and CO of the nearby dwarf galaxy NGC 2976. Our observations were made at both higher spatial resolution (~75 p…

astro-ph2003

Dark Matter in Dwarf Galaxies: The First Dark Galaxy?

Joshua D. Simon, Timothy Robishaw, Leo Blitz

We present new HI observations of the high-velocity cloud (HVC) that we resolved near the Local Group dwarf galaxy LGS 3. The cloud is rotating, with an implied mass that makes it…