Physics – Optics
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21941602f&link_type=abstract
American Astronomical Society, AAS Meeting #219, #416.02
Physics
Optics
Scientific paper
We report the discovery of a strongly lensed Planck-detected source at z = 3.26. The lensing nature of G12v2.30 was confirmed during our Keck Adaptive Optics imaging program of bright Herschel 500um sources from H-ATLAS. The 0.1"-resolution K-band image shows multiple lensed images across a 4" area, while the 2"-resolution Submillimeter Array image shows two 880um sources separated by 3". The positions of the submillimeter sources do not match those of the K-band sources, indicating differential magnifications due to a spatial offset between the rest-frame g-band stellar emission and the dust emission on the source plane. We construct a lens model by fitting the positions of the conjugate multiple images in the K-band and by assuming singular isothermal ellipsoid dark matter halos associated with the group of lensing galaxies at z 1.0. We then constrain the location of the 880um emission on the source plane with the best-fit lens model and the observed 880um image. The reconstructed source plane image shows two merging galaxies with the optical nuclei separated by 0.75 kpc (0.1") and a submillimeter source 2.2 kpc (0.3") north of the optical galaxies. The optical emission is magnified by a factor of 13, while the submilimeter emission is magnified by a factor of only 5. Our SED fitting indicates a dust temperature of 43 K and an obscured SFR of 900 M_sun/yr after correcting for the amplification. G12v2.30 provides a prelude to hundreds of lensed submillimeter galaxies from H-ATLAS that will be studied in depth with existing facilities.
Cooray Asantha
Fu Haixiang
H-ATLAS Team
Jullo Eric
No associations
LandOfFree
A Strongly Lensed Planck Source at z = 3.26 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 A Strongly Lensed Planck Source at z = 3.26, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Strongly Lensed Planck Source at z = 3.26 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1582722