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90 papers · 2 filters
Large-scale Correlation of Mass and Galaxies with the Lyman-alpha Forest Transmitted Flux
Patrick McDonald, Jordi Miralda-Escudé, Renyue Cen
We present predictions of the correlation between the Lyman-alpha forest absorption in quasar spectra and the mass within \sim 5 Mpc/h (comoving) of the line of sight, using fully…
Prospects for Determining the Equation of State of the Dark Energy: What can be Learned from Multiple Observables?
Jens Kujat, Angela M. Linn, Robert J. Scherrer +1
The dark energy that appears to produce the accelerating expansion of the universe can be characterized by an equation of state p=wρwith w<-1/3. A number of observational tests hav…
The Spectral Energy Distribution of the Seyfert galaxy Ton S180
T. J. Turner, P. Romano, S. B. Kraemer +14
We present spectral results from a multi-satellite, broad-band campaign on the Narrow-line Seyfert 1 galaxy Ton S180 performed at the end of 1999. We discuss the spectral-energy di…
Searching for Failed Supernovae With Astrometric Binaries
Andrew Gould, Samir Salim
Stars in the mass range 8 Msun<M<30 Msun are thought to end their lives as luminous supernovae that leave behind a neutron star. However, if a substantial fraction of these stars i…
Intermediate-band Surface Photometry of the Edge-on Galaxy: NGC 4565
Hong Wu, Dave Burstein, Zugan Deng
We present a deep, 42.79 hr image of the nearby, edge-on galaxy NGC 4565 in the Beijing-Arizona-Taipei-Connecticut (BATC) 6660A band using the large-format CCD system on the 0.6m S…
CO Observations of the Interacting Galaxy Pair NGC 5394/95
Michele Kaufman, Kartik Sheth, Curtis Struck +4
BIMA CO 1-0 observations are presented of the spiral galaxies NGC 5394 and NGC 5395 that have undergone a recent, grazing encounter. In NGC 5394, 80% of the CO emission detected by…