The Kiloparsec-Scale Structure and Kinematics of High-Redshift Star-Forming Galaxies

Language: English

Published by Dissertation.Com Sep 2008, 2008

1599426919 / 9781599426914

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Neuware - We study the spatially resolved properties of star-forming galaxies at redshift z 2 - 3 on scales 1 kpc using a combination of morphological and kinematic analyses in an effort to characterize the major mechanisms of galaxy formation in the young universe. Using a sample of 216 galaxies which have been spectroscopically confirmed to lie between redshifts z = 1.8 - 3.4 in the GOODS-N field we demonstrate that rest-UV morphology (as seen by the Hubble Space Telescope) is statistically uncorrelated with physical properties such as star formation rate and is therefore unable to support the hypothesis that the prevalence of irregular morphologies indicates a high major merger fraction. Further, we present a sample of 13 galaxies observed with the OSIRIS integral field spectrograph and the Keck laser-guide star adaptive optics system which demonstrate the prevalence of high velocity dispersions 80 km/s and generally little in the way of spatially resolved velocity gradients, inconsistent with favored rotating disk models. We discuss the implications of these results for galaxy formation models, including gas accretion via cold flows and gravitational instability of early gas-rich galactic disks. There is some evidence for a trend towards stronger rotational signatures in galaxies with more massive stellar populations. …

Seller Inventory # 9781599426914

Title
The Kiloparsec-Scale Structure and Kinematics of High-Redshift Star-Forming Galaxies
Author
David R. Law
Publisher
Dissertation.Com Sep 2008
Publication year
2008
Condition
Neu
Binding
Taschenbuch
Language
English
ISBN 10
1599426919
ISBN 13
9781599426914
Item weight
495 grams
Dimensions
246x189x14 mm

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