Search Publications
HST/ACS Emission Line Imaging of Low-redshift 3CR Radio Galaxies. I. The Data
Baum, Stefi A.; O'Dea, Christopher P.; Axon, David J. +11 more
We present 19 nearby (z < 0.3) 3CR radio galaxies imaged at low and high excitation as part of a Cycle 15 Hubble Space Telescope (HST) snapshot survey with the Advanced Camera for Surveys (ACS). These images consist of exposures of the Hα (6563 Å, plus [N II] contamination) and [O III]λ5007 emission lines using narrowband linear ramp filters ad…
Deep Optical Photometry of Six Fields in the Andromeda Galaxy
Ferguson, Henry C.; Brown, Thomas M.; Rich, R. Michael +7 more
Using the Advanced Camera for Surveys on the Hubble Space Telescope, we have obtained deep optical images reaching well below the oldest main-sequence turnoff in six fields of the Andromeda Galaxy. The fields fall at four positions on the southeast minor axis, one position in the giant stellar stream, and one position on the northeast major axis. …
Ten More New Sightlines for the Study of Intergalactic Helium, and Hundreds of Far-Ultraviolet-Bright Quasars, from the Sloan Digital Sky Survey, Galaxy Evolution Explorer, and Hubble Space Telescope
Anderson, Scott F.; Schneider, Donald P.; York, Donald G. +4 more
Absorption along quasar sightlines remains among the most sensitive direct measures of He II reionization in much of the intergalactic medium (IGM). Until recently, fewer than a half-dozen unobscured quasar sightlines suitable for the He II Gunn-Peterson test were known; although these handful demonstrated great promise, the small sample size limi…
An Infrared Spectroscopic Study of Amorphous and Crystalline Ices of Vinylacetylene and Implications for Saturn's Satellite Titan
Kaiser, R. I.; Kim, Y. S.
Laboratory infrared spectra of amorphous and crystalline vinylacetylene ices were recorded in the range of 7000-400 cm-1. The spectra showed several amorphous features in the ice deposited at 10 K, which were then utilized to monitor a phase transition between 93 ± 1 K to form the crystalline structure. Successive heating allows monitor…
Laboratory Spectra of the CO2 Bending-Mode Feature in Interstellar Ice Analogues Subject to Thermal Processing
Whittet, D. C. B.; Gerakines, P. A.; White, D. W. +1 more
The infrared absorption features of solid carbon dioxide have been detected by space-based observatories in nearly all lines of sight probing the dense interstellar medium (ISM). It has also been shown that the absorption feature of solid CO2 near 658 cm-1 (15.2 µm) should be a sensitive indicator of the physical condit…
The Infrared Array Camera Dark Field: Far-Infrared to X-ray Data
Frayer, D. T.; Surace, J. A.; Egami, E. +7 more
We present 20 band photometry from the far-IR to X-ray in the Spitzer Infrared Array Camera (IRAC) dark field. The bias for the near-IR camera on Spitzer is calibrated by observing a ~20' diameter "dark" field near the north ecliptic pole roughly every two-to-three weeks throughout the mission duration of Spitzer. The field is unique for its extre…
On the Solar Origin of the Signal at 220.7 µHz: A Possible Component of a g-Mode?
García, R. A.; Jiménez, A.
Gravity modes in the Sun have been the object of a long and difficult search in recent decades. Thanks to the data accumulated with the last generation of instruments (BiSON, GONG, and three helioseismic instruments aboard the Solar and Heliospheric Observatory (SOHO)), scientists have been able to find signatures of their presence. However, the i…
The Gemini/HST Cluster Project: Structural and Photometric Properties of Galaxies in Three z = 0.28-0.89 Clusters
Jørgensen, Inger; Chiboucas, Kristin; Barr, Jordi +3 more
We present the data processing and analysis techniques we are using to determine the structural and photometric properties of galaxies in our Gemini/HST Galaxy Cluster Project sample. The goal of this study is to understand cluster galaxy evolution in terms of scaling relations and structural properties of cluster galaxies at redshifts 0.15 < z…
Eta Carinae Across the 2003.5 Minimum: Analysis in the Visible and Near-Infrared Spectral Region
Weis, K.; Stahl, O.; Bomans, D. J. +3 more
We present an analysis of the visible through near-infrared spectrum of Eta Carinae (η Car) and its ejecta obtained during the "η Car Campaign with the Ultraviolet and Visual Echelle Spectrograph (UVES) at the ESO Very Large Telescope (VLT)." This is a part of larger effort to present a complete η Car spectrum, and extends the previously presented…
ERRATUM: "The Fifth Data Release Sloan Digital Sky Survey/XMM-Newton Quasar Survey" (2009, ApJS, 183, 17)
Elvis, M.; Risaliti, G.; Young, M.
We have discovered an error in Column 9 of Table 2 in the original paper. This column reports the fit flags, indicating which model a source prefers: a simple power-law (SPL; flag = 1), a fixed power-law plus intrinsic absorption (FPL; flag = 2), or an absorbed power-law (APL; flag = 3). The table of the original paper mistakenly reports all flag …