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Search for a High-Redshift Damped Lyman-Alpha Absorber with NICMOS

Kulkarni, Varsha P. and Hill, John M. and Weymann, Ray J. and Storrie-Lombardi, Lisa J. and Rieke, Marcia J. and Schneider, Glenn and Thompson, Rodger I. and Jannuzi, Buell (1999) Search for a High-Redshift Damped Lyman-Alpha Absorber with NICMOS. In: Chemical Evolution from Zero to High Redshift. Springer , Berlin, pp. 262-267. ISBN 978-3-662-21697-2.

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We present high-resolution HST NICMOS images of a quasar field known spectroscopically to have a damped Lyman-a absorber (DLA) at z = 1.892. The images were obtained in broad and narrow-band near-IR filters, with the aim of detecting the DLA in rest-frame continuum and Ha emission. The coronagraph was used for some continuum images to decrease the light from the background quasar. The coronagraphic images show a very faint feature containing four continuum emission knots, 0.7′ away from the quasar. The non-coronagraphic broad and narrow-band images show a brighter object ≈ 0.25″ from the quasar. However, the Hα contribution to the narrow-band emission from this object is negligible. Thus, either the DLA has a very low star formation rate 0 ± 2.6(4.8) M⊙ yr^(-1) for q_0 = 0.5(0.1), or dust extinction effects are important, or the object is not the DLA. In any case, our images suggest compact, somewhat clumpy objects at best, rather than large, well-formed proto-galactic disks.

Item Type:Book Section
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URLURL TypeDescription
Storrie-Lombardi, Lisa J.0000-0002-5987-5210
Rieke, Marcia J.0000-0002-7893-6170
Schneider, Glenn0000-0002-4511-5966
Jannuzi, Buell0000-0002-1578-6582
Additional Information:© 1999 Springer-Verlag Berlin Heidelberg. This project was supported by NASA grant NAG5-3042 to the NICMOS Instrument Definition Team.
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Record Number:CaltechAUTHORS:20170329-131530053
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75513
Deposited By: Tony Diaz
Deposited On:29 Mar 2017 20:44
Last Modified:15 Nov 2021 16:34

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