output
19922026
most citedThe Seventh Data Release of the Sloan Digital Sky Survey

5.4k citations

Showing 2001 · astro-phShow all

6 papers · 2 filters

astro-ph2001★ 399 cited

Evidence for Accretion: High-Resolution X-ray Spectroscopy of the Classical T Tauri Star TW Hydrae

Joel H. Kastner, David P. Huenemoerder, Norbert S. Schulz +2

We present high resolution X-ray spectra of the X-ray bright classical T Tauri star, TW Hydrae, covering the wavelength range of 1.5-25 AA. The differential emission measure derive…

astro-ph2001★ 360 cited

Clouds and Chemistry: Ultracool Dwarf Atmospheric Properties from Optical and Infrared Colors

M. S. Marley, S. Seager, D. Saumon +4

The optical and infrared colors of L and T dwarfs are sensitive to cloud sedimentation and chemical equilibrium processes in their atmospheres. The i'-z' vs. J-K color-color diagra…

astro-ph2001★ 234 cited

Direct Detection of Galactic Halo Dark Matter

B. R. Oppenheimer, N. C. Hambly, A. P. Digby +2

The Milky Way Galaxy contains a large, spherical component which is believed to harbor a substantial amount of unseen matter. Recent observations indirectly suggest that as much as…

astro-ph2001★ 120 cited

Infrared Observations and Modeling of one of the Coolest T Dwarfs, Gl 570D

T. R. Geballe, D. Saumon, S. K. Leggett +3

We have obtained a good quality R400 0.8-2.5 m spectrum and accurate photometry of Gl 570D, one of the coolest and least luminous brown dwarfs currently known. The spectru…

astro-ph2001★ 38 cited

An Auger test of the Cen A model of highest energy cosmic rays

Luis A. Anchordoqui, Haim Goldberg, Thomas J. Weiler

If, as recently proposed by Farrar and Piran, Cen A is the source of cosmic rays detected above the Greisen-Zatsepin-Kuz'min cutoff, neutrons are more probable than p…

astro-ph2001★ 54 cited

Observations of Ultracool White Dwarfs

B. R. Oppenheimer, D. Saumon, S. T. Hodgkin +6

We present new spectroscopic and photometric measurements of the white dwarfs LHS 3250 and WD 0346+246. Along with F351-50, these white dwarfs are the coolest ones known, all with…