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10 papers · 2 filters
Are Debris Disks and Massive Planets Correlated?
Amaya Moro-Martín, John M. Carpenter, Michael R. Meyer +13
Using data from the Spitzer Space Telescope Legacy Science Program ``Formation and Evolution of Planetary Systems'' (FEPS), we have searched for debris disks around 9 FGK stars (2-…
Thermal and Non-Thermal Infrared Emission from M87
Y. Shi, G. H. Rieke, D. C. Hines +2
We discuss images of M87 from 3.6 to 160 um obtained with Spitzer. As found previously, there is an excess in the far infrared over a simple power law interpolation from the radio…
Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars
Rajib Ganguly, Michael S. Brotherton, Nahum Arav +35
We present low-resolution ultraviolet spectra of 14 low redshift (z<0.8) quasars observed with HST/STIS as part of a Snap project to understand the relationship between quasar outf…
9.7 um Silicate Features in AGNs: New Insights into Unification Models
Y. Shi, G. H. Rieke, D. C. Hines +6
We describe observations of 9.7 um silicate features in 97 AGNs, exhibiting a wide range of AGN types and of X-ray extinction toward the central nuclei. We find that the strength o…
Probing the Evolution of IR Properties of z~6 Quasars: Spitzer Observations
Linhua Jiang, Xiaohui Fan, Dean C. Hines +14
We present Spitzer observations of thirteen z~6 quasars using the Infrared Array Camera (IRAC) and Multiband Imaging Photometer for Spitzer (MIPS). All the quasars except SDSS J000…
Formation and Evolution of Planetary Systems: Upper Limits to the Gas Mass in Disks Around Sun-like Stars
I. Pascucci, U. Gorti, D. Hollenbach +17
We have carried out a sensitive search for gas emission lines at infrared and millimeter wavelengths for a sample of 15 young sun-like stars selected from our dust disk survey with…
Spitzer Observations of High Redshift QSOs
D. C. Hines, O. Krause, G. H. Rieke +3
We have observed 13 z >= 4.5 QSOs using the Multiband Imaging Photometer for Spitzer, nine of which were also observed with the Infrared Array Camera. The observations probe rest w…
The NICMOS Polarimetric Calibration
D. Batcheldor, A. Robinson, D. Axon +3
The value of accurately knowing the absolute calibration of the polarizing elements in the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) becomes especially important…
Polarimetry with NICMOS
D. C. Hines, G. Schneider
NICMOS cameras 1 and 2 each carry a set of three polarizing elements to provide high sensitivity observations of linearly polarized light. The polarizers are bandpass limited and p…
Spectral Energy Distributions and Multiwavelength Selection of Type 1 Quasars
Gordon T. Richards, Mark Lacy, Lisa J. Storrie-Lombardi +14
We present an analysis of the mid-infrared (MIR) and optical properties of type 1 (broad-line) quasars detected by the Spitzer Space Telescope. The MIR color-redshift relation is c…