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STIS Observations of the Low-z Ly-Alpha ForestThe Space Telescope Imaging Spectrograph (STIS) aboard the Hubble Space Telescope has brought a new era in studying the low-redshift Lyman-alpha Forest. The advantages of STIS over previous HST spectrographs include: (1) a high spectral resolution (7 km/s) comparable to Keck/HIRES spectra of the high-z Lyman-alpha forest; and (2) a high observing efficiency brought about by an imaging detector able to span the full far-UV wavelength range (1150-1700 A, or equivalently, z=0.0-0.4) in a single exposure. The STIS Investigation Definition Team is therefore conducting an observational program to determine the properties of the low-z intergalactic medium as manifested by the Lyman-alpha forest. The team has made observations of the quasars: 3C 273, 3C 351, and PKS 0405. We shall present preliminary results based on the sightline to 3C 273, the brightest of these sources.
Document ID
20010071700
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Heap, Sara R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Weymann, Ray (NASA Goddard Space Flight Center Greenbelt, MD United States)
Williger, Gerry (NASA Goddard Space Flight Center Greenbelt, MD United States)
Fisher, Richard R.
Date Acquired
August 20, 2013
Publication Date
January 6, 2001
Subject Category
Astronomy
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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