311 citations · 1.3k across the 32 of their papers we have counts for
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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…
An Infrared Coronagraphic Survey for Substellar Companions
P. Lowrance, E. E. Becklin, G. Schneider +10
We have used the F160W filter (1.4-1.8 um) and the coronagraph on the Near-InfraRed Camera and Multi-Object Spectrometer (NICMOS) on the Hubble Space Telescope (HST) to survey 45 s…
Fundamental Properties of O-Type Stars
Sara R. Heap, Thierry Lanz, Ivan Hubeny
We present a comprehensive analysis of high-resolution, far-UV HST/STIS, FUSE, and optical spectra of 17 O stars in the SMC. Our analysis is based on NLTE metal line-blanketed mode…
Limits on the Optical Brightness of the Epsilon Eridani Dust Ring
Charles Proffitt, Kailash Sahu, Mario Livio +10
The STIS/CCD camera on the {\em Hubble Space Telescope (HST)} was used to take deep optical images near the K2V main-sequence star Eridani in an attempt to find an optical coun…
Terminal velocities of luminous, early-type SMC stars
C. J. Evans, D. J. Lennon, C. Trundle +2
Ultraviolet spectra from the Space Telescope Imaging Spectrograph (STIS) are used to determine terminal velocities for 11 O and B-type giants and supergiants in the Small Magellani…
STIS Spectroscopy of PKS 0405-123
G. Williger, S. Heap, R. Weymann +2
We present results for QSO PKS 0405-123 (z=0.574, V=14.9), as part of a STIS Investigation Definition Team (IDT) key project to study weak Ly-alpha forest systems at low z. We dete…
Quantitative Spectroscopy of O Stars at Low Metallicity. O Dwarfs in NGC 346
J. -C. Bouret, T. Lanz, D. J. Hillier +5
We present the results of a detailed UV and optical spectral analysis of the properties of 6 dwarf O-type stars in the SMC H II region NGC 346. Stellar parameters, chemical abundan…
Emission Line Galaxies in the STIS Parallel Survey I: Observations and Data Analysis
Harry I. Teplitz, Nicholas R. Collins, Jonathan P. Gardner +5
In the first three years of operation STIS obtained slitless spectra of approximately 2500 fields in parallel to prime HST observations as part of the STIS Parallel Survey (SPS). T…
The Heavy Element Enrichment of Lyman alpha Clouds in the Virgo Supercluster
T. M. Tripp, E. B. Jenkins, G. M. Williger +11
Using high S/N STIS echelle spectra (FWHM=7 km/s) of 3C 273, we constrain the metallicities of two Lya clouds in the vicinity of the Virgo cluster. We detect C II, Si II, and Si II…
HST/STIS Spectroscopy of 3C 273
S. R. Heap, G. M. Williger, R. Dave +3
We present preliminary results on the low-redshift Lyman alpha forest as based on STIS spectra of 3C 273. A total of 121 intergalactic Lyman alpha-absorbing systems were detected,…
The Metallicity of the Local IGM from the HST/STIS Spectrum of 3C273
Romeel Davé, S. R. Heap, G. M. Williger +3
We present a preliminary study of the metallicity of low-redshift Lyman alpha absorbers from the HST/STIS spectrum of 3C273. Using a pixel-based shift-and-coadd technique, we compa…
A Pair of Compact Red Galaxies at Redshift 2.38, Immersed in a 100 kpc Scale Ly-alpha Nebula
P. J. Francis, G. M. Williger, N. R. Collins +12
We present Hubble Space Telescope (HST) and ground-based observations of a pair of galaxies at redshift 2.38, which are collectively known as 2142-4420 B1 (Francis et al. 1996). Th…
AB Dor in '94: I. HST/GHRS Observations of the Quiescent Chromosphere of an Active Star
J. C. Brandt, S. R. Heap, F. M. Walter +15
We analyze HST/GHRS spectra of AB Doradus, the prototypical ultra-rapidly rotating K dwarf. We observed chromospheric (Mg II) and transition region (C II, Si IV, C IV, and N V) lin…
Indicator of Exo-Solar Planet(s) in the Circumstellar Disk Around Beta Pictoris
Nick Gorkavyi, Sara Heap, Leonid Ozernoy +2
Our efficient numerical approach has been applied to modeling the asymmetric circumstellar dust disk around Beta Pictoris as observed with the HST/STIS. We present a new model on t…
HST/STIS observations of the HeII Gunn-Peterson effect towards HE 2347-4342
Alain Smette, Sara R. Heap, Gerard M. Williger +3
We present an HST STIS spectrum of the HeII Gunn-Peterson effect towards HE2347-4342. Compared to the previous HST GHRS data obtained by Reimers et al. (1997), the STIS spectrum ha…
Orbital Motion of Resonant Clumps in Dusty Circumstellar Disks as a Signature of an Embedded Planet
Nick N. Gorkavyi, Leonid M. Ozernoy, John C. Mather +1
We have applied a powerful numerical approach to compute, with a high resolution, the structure of dusty circumstellar disks with embedded planets. We emphasize some testable impli…
STIS Coronagraphic Observations of Beta Pictoris
Sara R. Heap, Don J. Lindler, Thierry M. Lanz +4
We present new coronagraphic images of Beta Pictoris obtained with the Space Telescope Imaging Spectrograph (STIS) in September 1997. The high-resolution images (0.1") clearly dete…
On The Age Estimation of LBDS 53W091
Sukyoung YI, T. M. Brown, S. Heap +4
The recent spectral analysis of LBDS 53W091 by Spinrad and his collaborators has suggested that this red galaxy at z=1.55 is at least 3.5 Gyr old. This imposes an important constra…
Hot stellar population synthesis from the UV spectrum: the globular cluster M79 (NGC 1904)
Jorick S. Vink, Sara R. Heap, Allen V. Sweigart +2
We have analyzed the far UV-spectrum of the globular cluster M79. We show that the nearly Gaussian mass distribution of zero-age horizontal-branch stars, as derived by Dixon et al.…
Emission-Line Galaxies from the NICMOS/HST GRISM Parallel Survey
P. J. McCarthy, L. Yan, W. Freudling +10
We present the first results of a survey of random fields with the slitless G141 () grism on NICMOS. Approximately 64 square arcminutes have been observed at i…
STIS Observations of He II Gunn-Peterson Absorption Toward Q0302-003
S. R. Heap, G. M. Williger, A. Smette +5
The ultraviolet spectrum (1145--1720A) of the distant quasar Q 0302--003 (z=3.286) was observed at 1.8A resolution with the Space Telescope Imaging Spectrograph aboard the Hubble S…
Galaxy Morphology from NICMOS Parallel Imaging
Harry I. Teplitz, Jonathan P. Gardner, Eliot M. Malumuth +1
We present high resolution NICMOS images of random fields obtained in parallel to other HST observations. We present galaxy number counts reaching H=24. The H-band galaxy counts sh…
UV Spectral Dating of Stars and Galaxies
S. R. Heap, T. M. Brown, I. Hubeny +17
An echelle spectrogram (R = 30,000) of the 2300-3100 A region in the ultraviolet spectrum of the F8V star 9 Comae is presented. The observation is used to calibrate features in the…
The STIS Parallel Survey: Introduction and First Results
J. P. Gardner, R. S. Hill, S. A. Baum +15
The installation of the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope (HST) allows for the first time two-dimensional optical and ultraviolet slitless s…