Elizabeth Stobie

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We present the discovery of debris systems around three solar mass stars based upon observations performed with the Spitzer Space Telescope as part of a Legacy Science Program, " the Formation and Evolution of Planetary Systems " (FEPS). We also confirm the presence of debris around two other stars. All the stars exhibit infrared emission in excess of the(More)
This paper presents data obtained during the NICMOS Guaranteed Time Observations of a portion of the Hubble Deep Field. The data are in a catalog format similar to the publication of the original WFPC2 Hubble Deep Field program (Williams et al.). The catalog contains 342 objects in a 49A .1 ] 48A .4 subÐeld of the total observed Ðeld, 235 of which are(More)
This paper describes the observations and data reduction techniques for the version 2.0 images and catalog of the Near-Infrared Camera and Multi-Object Spectrometer Ultra Deep Field (NICMOS UDF) Treasury program. All sources discussed in this paper are based on detections in the combined NICMOS F110W and F160W bands only. The NICMOS images are drizzled to(More)
2 ABSTRACT We use the ultraviolet and optical WFPC2 and near-infrared NICMOS images of the Hubble Deep Field North to measure and statistically compare an array of parameters for over 250 of the galaxies it contains. These parameters include redshift, rest-frame visible asymmetry and concentration, bolometric luminosity and extinction-corrected star(More)
We provide an overview of the Spitzer Legacy Program " Formation and Evolution of Planetary Systems " (FEPS) which was proposed in 2000, begun in 2001, and executed aboard the Spitzer Space Telescope between 2003 and 2006. This program exploits the sensitivity of Spitzer to carry out mid-infrared spectrophotometric observations of solar-type stars. With a(More)
We report the discovery of a debris system associated with the ∼ 30 Myr old G3/5V star HD 12039 using Spitzer Space Telescope observations from 3.6 – 160µm. An observed infrared excess (L IR /L * = 1 × 10 −4) above the expected photosphere for λ 14µm is fit by thermally emitting material with a color temperature of T∼ 110 K, warmer than the majority of(More)
We summarize the results of a monitoring program which was executed following the cryogen exhaustion of the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) onboard the Hubble Space Telescope. During the subsequent warm-up, detector parameters such as detective quantum efficiency, dark current, bias offsets, and saturation levels have been(More)
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 the Spitzer Space Telescope. We have used mid–infrared lines to trace the warm (300–100 K) gas in the inner disk and millimeter transitions of 12 CO to probe the cold (∼20 K)(More)
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