MARC 主機 00000nam  2200337   4500 
001    AAI3408531 
005    20111130124035.5 
008    111130s2010    ||||||||||||||||| ||eng d 
020    9781124048680 
035    (UMI)AAI3408531 
040    UMI|cUMI 
100 1  Grodnicki, Lauren R 
245 10 Luminous halos surrounding edge-on disk galaxies in the 
       Sloan Digital Sky Survey 
300    82 p 
500    Source: Dissertation Abstracts International, Volume: 71-
       07, Section: B, page: 4297 
500    Adviser: Richard Kron 
502    Thesis (Ph.D.)--The University of Chicago, 2010 
520    We present the first measurement of both major-axis and 
       minor-axis average surface brightness profiles of low-
       redshift (0.009 ≤ z ≤ 0.1), edge-on Sc-Sd galaxies. 
       The 906 objects in our sample have 90% Petrosian radii 
       between 5 kpc and 15 kpc and were selected from the Fourth
       Data Release of the Sloan Digital Sky Survey. The minor-
       axis profile extends to 20 kpc above the disk and a 
       limiting surface brightness of 30 mag/arcsec2 . We 
       demonstrate that this surface brightness profile is best 
       fit by an exponential+power-law with slope 2.3 +/- 0.3 in 
       agreement with simulations and star counts around 
       individual galaxies. We attribute the power-law component 
       to a diffuse stellar halo and present the first 
       measurement of such around isolated, late-type galaxies. 
       We also divide our sample according to physical size and 
       show that the minor-axis power-law slopes of the two size 
       categories do not differ by more than 2sigma, also in 
       agreement with simulations. We find that the average major
       -axis scale length is reap = 4.37 +/- 0.012 kpc, somewhat 
       larger than the typical value for face-on galaxies (see, 
       for example, Kent (1985)). We also present the first 
       measurement of the ratio of the disk luminosity to that of
       the halo, and provide a context for this ratio 
590    School code: 0330 
650  4 Physics, Astrophysics 
690    0596 
710 2  The University of Chicago.|bAstronomy and Astrophysics 
773 0  |tDissertation Abstracts International|g71-07B 
856 40 |u