The Nature Of Dusty Star-forming Galaxies (springer Theses)
by William Cowley /
2017 / English / PDF
8.8 MB Download
This thesis combines a theoretical model of galaxy formation with
a treatment of the radiative transfer in the titular dusty
star-forming galaxies. Embedding this within the well-established
ΛCDM (Lambda cold dark matter) cosmology, the author was able to
simulate galaxy populations from which realistic observational
images were synthesised. Based on further analysis, he shows that
there is a good correspondence with observations from new
instruments such as the SCUBA2 bolometric camera and the Atacama
Large Millimeter Array (ALMA) interferometer, and reveals some
novel aspects of this exciting galaxy population. In particular,
he shows that blending of these galaxies in the imaging produces
an artificial enhancement in their clustering, which he dubs
“blending bias”. This implies that the host dark matter halo
masses for these galaxies have previously been significantly
overestimated. He also presents amongst the first predictions
from a galaxy formation model for observations of these galaxies
that will be made by the James Webb Space Telescope (the
successor to the Hubble Space Telescope).
This thesis combines a theoretical model of galaxy formation with
a treatment of the radiative transfer in the titular dusty
star-forming galaxies. Embedding this within the well-established
ΛCDM (Lambda cold dark matter) cosmology, the author was able to
simulate galaxy populations from which realistic observational
images were synthesised. Based on further analysis, he shows that
there is a good correspondence with observations from new
instruments such as the SCUBA2 bolometric camera and the Atacama
Large Millimeter Array (ALMA) interferometer, and reveals some
novel aspects of this exciting galaxy population. In particular,
he shows that blending of these galaxies in the imaging produces
an artificial enhancement in their clustering, which he dubs
“blending bias”. This implies that the host dark matter halo
masses for these galaxies have previously been significantly
overestimated. He also presents amongst the first predictions
from a galaxy formation model for observations of these galaxies
that will be made by the James Webb Space Telescope (the
successor to the Hubble Space Telescope).
