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Optical Spectroscopy of a Flare on Barnard's Star
D. Paulson, J. Allred, R. Anderson +3
We present optical spectra of a flare on Barnard's star. Several photospheric as well as chromospheric species were enhanced by the flare heating. An analysis of the Balmer lines s…
The Radio Spectrum of TVLM513-46546: Constraints on the Coronal Properties of a Late M Dwarf
Rachel A. Osten, Suzanne L. Hawley, Timothy S. Bastian +1
We explore the radio emission from the M9 dwarf, TVLM513-46546, at multiple radio frequencies, determining the flux spectrum of persistent radio emission, as well as constraining t…
Investigating the Late Stages of Stellar Evolution with Long Period Variables from MACHO and 2MASS
Oliver J. Fraser, Suzanne L. Hawley, Kem H. Cook
We are re-analyzing the MACHO variable star database to explore the relationships between pulsation, evolution, and mass loss in evolved stars. We will analyze the multi-periodic p…
Testing LMC Microlensing Scenarios: The Discrimination Power of the SuperMACHO Microlensing Survey
A. Rest, C. Stubbs, A. C. Becker +18
Characterizing the nature and spatial distribution of the lensing objects that produce the previously measured microlensing optical depth toward the Large Magellanic Cloud (LMC) re…
The Fourth Data Release of the Sloan Digital Sky Survey
J. K. Adelman-McCarthy et al.
This paper describes the fourth data release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through June 2004. The data release includes five-band…
Radiative Hydrodynamic Models of the Optical and Ultraviolet Emission from Solar Flares
J. C. Allred, S. L. Hawley, W. P. Abbett +1
We report on radiative hydrodynamic simulations of moderate and strong solar flares. The flares were simulated by calculating the atmospheric response to a beam of non-thermal elec…