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135 papers · 2 filters
Five Planets Orbiting 55 Cancri
Debra A. Fischer, Geoffrey W. Marcy, R. Paul Butler +9
We report 18 years of Doppler shift measurements of a nearby star, 55 Cancri, that exhibit strong evidence for five orbiting planets. The four previously reported planets are stron…
Spitzer 24-micron Time-Series Observations of the Eclipsing M-dwarf Binary GU Bootis
Kaspar von Braun, Gerard T. van Belle, David R. Ciardi +3
We present a set of {\it Spitzer} 24m MIPS time series observations of the M-dwarf eclipsing binary star GU Boötis. Our data cover three secondary eclipses of the system: two co…
A Search for Extended Ultraviolet Disk (XUV-disk) Galaxies in the Local Universe
David A. Thilker, Luciana Bianchi, Gerhardt Meurer +26
We have initiated a search for extended ultraviolet disk (XUV-disk) galaxies in the local universe. Herein, we compare GALEX UV and visible--NIR images of 189 nearby (D40 Mpc) S…
Complex Organic Materials in the Circumstellar Disk of HR 4796A
J. H. Debes, A. J. Weinberger, G. Schneider
We combine HST/NICMOS imaging photometry of the HR 4796A disk at previously unobserved wavelengths between 1.71-2.22\micron with reprocessed archival observations to produce a meas…
CS22964-161: A Double-Lined Carbon- and s-Process-Enhanced Metal-Poor Binary Star
Ian B. Thompson, Inese I. Ivans, Sara Bisterzo +6
A detailed high-resolution spectroscopic analysis is presented for the carbon-rich low metallicity Galactic halo object CS 22964-161. We have discovered that CS 22964-161 is a doub…
The Host Galaxies and Black Holes of Typical z~0.5-1.4 AGN
A. Alonso-Herrero, P. G. Perez-Gonzalez, G. H. Rieke +5
We study the stellar and star formation (SF) properties of the host galaxies of 58 X-ray selected AGN in the GOODS portion of the Chandra Deep Field South (CDF-S) region at z~0.5-1…