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The Hubble Deep Field: Observations, Data Reduction, and Galaxy Photometry
Dickinson, Mark; Ferguson, Henry C.; Giavalisco, Mauro +14 more
The Hubble Deep Field (HDF) is a Director's Discretionary program on HST in Cycle 5 to image an undistinguished field at high Galactic latitude in four passbands as deeply as reasonably possible. These images provide the most detailed view to date of distant field galaxies and are likely to be important for a wide range of studies in galaxy evolut…
Spectroscopy of Lyman Break Galaxies in the Hubble Deep Field
Dickinson, Mark; Giavalisco, Mauro; Steidel, Charles C. +1 more
We report on the initial results of a spectroscopic investigation of galaxies in the Hubble Deep Field which exhibit spectral discontinuities between the F450W and F300W passbands, indicative of the presence of the Lyman continuum break in the redshift range 2.4 <~ z <~ 3.4. We have employed color selection criteria similar to those we have …
Hubble Space Telescope WFPC2 Imaging of M16: Photoevaporation and Emerging Young Stellar Objects
Holtzman, J. A.; Faber, S. M.; Ewald, S. P. +20 more
We present Hubble Space Telescope WFPC2 images of elephant trunks in the H II region M16. There are three principle results of this study. First, the morphology and stratified ionization structure of the interface between the dense molecular material and the interior of the H II region is well understood in terms of photoionization of a photoevapo…
Direct Imaging of Circumstellar Disks in the Orion Nebula
McCaughrean, Mark J.; O'Dell, C. Robert
Recent surveys of the Orion Nebula with the Hubble Space Telescope have revealed a number of stars surrounded by dark silhouettes seen projected against the bright background H II region. In this paper, we present a detailed analysis of HST and ground-based observations of the six most distinct silhouettes. We find a variety of morphologies, all c…
A Morphological Catalog of Galaxies in the Hubble deep Field
Ellis, Richard S.; Abraham, Roberto G.; van den Bergh, Sidney +3 more
We present a catalog of morphological and color data for galaxies with 21 <I_814_ < 25 mag in the Hubble Deep Field (Williams et al. 1996). Galaxies have been inspected and (when possible) independently visually classified on the MDS and DDO systems. Measurements of central concentration and asymmetry are also included in the catalog. The fr…
The Centers of Early-Type Galaxies With HST. III. Non-Parametric Recovery of Stellar Luminosity Distribution
Gebhardt, Karl; Richstone, Douglas; Kormendy, John +7 more
We have non-parametrically determined the luminosity density profiles and their logarithmic slopes for 42 early-type galaxies observed with HST. Assuming that the isodensity contours are spheroidal, then the luminosity density is uniquely determined from the surface brightness data through the Abel equation. For nearly all the galaxies in our samp…
Rapid Variability in S5 0716+714 Across the Electromagnetic Spectrum
Quirrenbach, A.; Wagner, S. J.; Zensus, J. A. +14 more
We have investigated the rapid variations of the BL Lac object S5 0716+714 in the radio, optical, ultraviolet, and x-ray regimes. Several simultaneous multifrequency campaigns have been carried out. Here we describe the complete analysis of a four-week monitoring campaign at three radio and three optical frequency bands, simultaneous optical-UV an…
Hubble Space Telescope Mapping of the Orion Nebula. I. A Survey of Stars and Compact Objects
O'Dell, C. R.; Wong, Kwan
We report on a survey of the brightest portions of the Orion Nebula made with the Wide Field Planetary Camera 2 of the Hubble Space Telescope. Fifteen pointings were made, each employing interference filters isolating the principal emission lines of H I, [N II], and [O III] and another isolating an interval similar to the V bandpass. A careful sur…
Hubble Space Telescope Observations of Candidate Young Globular Clusters and Stellar Associations in the Recent Merger Remnant NGC 3921
Whitmore, Bradley C.; Fall, S. Michael; Miller, Bryan W. +1 more
New, high-resolution images of NGC 3921 obtained with the Wide Field and Planetary Camera 2 of the refurbished HST are presented. NGC 3921 is the remnant of two merged disk galaxies and thought to be a 0.7+/-0.3 Gyr old protoelliptical. A search for star clusters has yielded 102 candidate globular clusters (GC) and 49 separate, more extended stell…
Spectrophotometric Standards From the Far-UV to the Near-IR on the White Dwarf Flux Scale
Bohlin, Ralph C.
The second generation instruments to be installed in 1997 on the Hubble Space Telescope (HST) require spectrophotometric standard stars for flux calibrations to 1.1 µm for the imaging spectrograph (STIS) and to 2.5 µm for the infrared camera (NICMOS). Calculated model atmosphere flux distributions from 0.1 to 3 µm for four pure h…