NDLI: Ly alpha and ir galaxy companions of high redshift damped ly alpha qso absorbers

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Ly alpha and ir galaxy companions of high redshift damped ly alpha qso absorbers

Content Provider	NASA Technical Reports Server (NTRS)
Author	McCaughrean, Mark Caulet, Adeline
Copyright Year	1993
Description	We have used a Near-Infrared Camera and Multi-Object Spectrometer (NICMOS3) HgCdTe 256x256 array detector with the Infrared (IR) camera on the 2.3m telescope at Steward Observatory to image several Quasi-Stellar Object (QSO) fields. The limiting magnitude is K'(2.1 microns) = 21.0 - 21.5 mag per square arcsec for a 3 sigma detection in 3 hours of in-field chopping observations. Each QSO line-of-sight samples several known absorbers with Mg2(lambda)2796-2803 A and/or C4(lambda)1548-1551 A absorption doublets. The equivalent width distributions of the low and high ionization absorption lines of the absorber sample are identical to those of the parent population of all absorbers. This selection process, used already for a spectroscopic survey of Mg2 absorption lines in C4-selected absorption systems at high z, gives a methodical approach to observing, reduces the observer biases, and makes a more efficient use of telescope time. This selection guarantees that imaging of the sample of QSO fields will provide complete sampling of the whole population of high z QSO absorbers. Follow-up optical and IR spectroscopy of these objects is scheduled for redshift measurement and confirmation of the absorbing galaxies and the cluster members.
File Size	192661
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930017693
Archival Resource Key	ark:/13960/t75t8jq0m
Language	English
Publisher Date	1993-01-01
Access Restriction	Open
Subject Keyword	Astrophysics Quasars Infrared Spectroscopy Red Shift Lyman Alpha Radiation Imaging Techniques Astronomical Spectroscopy Line of Sight Mercury Cadmium Tellurides Spectrometers Telescopes Cameras Infrared Radiation Spiral Galaxies Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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