Differential Lensing Effects in High-z Sources: Constraining the Size and Shape of the Emitting Regions

Details Differential Lensing Effects in High-z Sources: Constraining the Size and Shape of the Emitting Regions Differential Lensing Effects in High-z Sources: Constraining the Size and Shape of the Emitting Regions

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..375..250k&link_type=abstract

From Z-Machines to ALMA: (Sub)Millimeter Spectroscopy of Galaxies ASP Conference Series, Vol. 375, proceedings of the conference

Astronomy and Astrophysics

Astronomy

Scientific paper

One of the greatest obstacles in determining the physical parameters of galaxies in the early universe is our inability to accurately constrain the sizes of the sources detected. Current cutting-edge mm/submm interferometers such as the Submillimeter Array (SMA) and the Plateau de Bure Interferometer IRAM (PdBI) yield angular resolutions of about 1'', which is in most cases not sufficient to resolve the observed emission at high z. However, if the high-redshift source is gravitationally lensed by an intervening galaxy, the angular resolution can be improved by up to two orders of magnitude, as demonstrated in the case of the Cloverleaf galaxy. Light from extended regions is deflected in a different way than light from compact structures, so that the lensed images set tight constraints on their true sizes and shapes. We will discuss the use of such differential lensing effects for three gravitationally lensed high-redshift quasars: Q0957+561 (z=1.41), SBS1520+530 (z=1.86), and APM08279+5255 (z=3.9). We have recently detected molecular gas emission traced by CO in the first two sources, doubling the number of CO detections in this mostly unexplored redshift range of z=1-2. We will be able to use this technique as well to place even tighter constraints on the size of the dust emission in APM08279+5255, using the new very extended configurations of the SMA and PdBI with their angular resolutions of 0.3''-0.4''.

Affiliated with

Also associated with

No associations

Rating

Differential Lensing Effects in High-z Sources: Constraining the Size and Shape of the Emitting Regions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Differential Lensing Effects in High-z Sources: Constraining the Size and Shape of the Emitting Regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential Lensing Effects in High-z Sources: Constraining the Size and Shape of the Emitting Regions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-955381