(Proposal ID) S15B-006

(PI) Misawa, Toru

(Proposal Title)
Characterizing Clump Sizes in Outflow through Multi-Sightline Spectroscopy

(Abstract)
The purpose of this proposal is to place most stringent constraint ever on the 
size of clumpy clouds in outflowing matter of quasars (i.e., outflowing winds 
launched from accretion disks) through multi-sightline spectroscopy of a 
lensed quasar, SDSS J1001+5027. In past semesters S10A and S14A, we observed 
the two images of the lensed quasar, SDSS J1029+2623 whose separation angle 
(theta ~ 22".5) is the largest among those discovered so far, using Subaru/HDS.
 We discovered a clear difference of absorption profile in two image spectra, 
and then confirmed that the difference remains unchanged since the previous 
observation with time interval of ~4 years, implying the difference is not 
due to time variability of the absorption profiles over the delay between the 
images, ~744 days, but rather due to differences along the sightlines. In this 
program, we will carry out same observation for another target (lensed by a 
single galaxy) whose separation angle is smaller by one order of magnitude 
(theta ~2".86) and examine the finest internal structure of the outflow among 
investigated ever. In a semester S16A, we will perform the same observation 
again to i) reject the time variation scenario (i.e., confirm the multi-
sightline scenario) and ii) measure the absorber's size and their distances 
from the flux source.