Assigned ID: 886
----- Attempting Submission 1 (Fri Feb 24 23:07:12 GMT 2012) -----
HST Phase I Proposal 886 (magnetic.apt) successfully submitted.
----- Attempting Submission 2 (Sat Feb 25 00:03:12 GMT 2012) -----
HST Phase I Proposal 886 (magnetic.apt) successfully submitted.
Changed dither pattern to WFC-Dither-Box and changed target position to WFC1.
Separate email sent to Tricia Royle.
----- Attempting Submission 1 (Mon Jul 09 18:11:47 GMT 2012) -----
----- Attempting Submission 2 (Mon Sep 10 11:39:24 GMT 2012) -----
Do winds transport magnetic fields out of high redshift galaxies?
The primary goal of this proposal is to use HST observations to identify the location of magnetized plasma around high redshift galaxies, to understand its origin and to test the idea that winds carry substantial magnetic fields out from these galaxies into the circumgalactic medium. We have recently presented evidence for magnetized plasma extending upto 60 kpc from high redshift galaxies, and also for azimuthal (bipolar) asymmetries in the distribution of MgII absorption on the same scales. The two phenomena may be linked via galactic-scale winds. We here propose to observe the fields of thirteen compact radio quasars (supplementing three already observed with HST) that have (a) a Faraday Rotation measurement, (b) a single strong intervening MgII absorption system, and (c) an unambigously identified parent galaxy for the absorbing system. The goal is to determine the orientations of the parent galaxies, i.e. both the inclination to our line of sight and the projected angle phi between the minor axis of the galaxy and the direction to the quasar on the plane of the sky. By correlating phi with the observed Faraday Rotation, we hope to see whether the magnetised plasma is above the pole of the galaxy or in an extended disk, and thereby constrain its origin.
These are straightforward single orbit single-filter observations of thrteen quasar fields.
QUASAR ABSORPTION LINES AND IGM
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