Skip to content

Astronomy Seminar

Wednesday, 23 May 2018
14:00-15:00

This event has ended.

Contact

Add to calendar

I will present high resolution (0.03 arcsec) rest-frame 160 micron continuum maps of four z~4.5 sub-mm galaxies (SMGs) selected from the ALMA-LESS and ALMA-UDS surveys. These cycle 3 observations resolve the gas and dust within the ISM of these galaxies on 0.2-1 kpc scales. The data reveal an apparent range of morphologies. Though the continuum morphologies appear to be: smooth and compact or extended and ‘clumpy’, comparison with simulations reveal that all four sources are consistent with exponential discs. From the morphologies and dynamics of the gas and dust, I will show that these SMGs are most likely to contain dust discs which are smooth on scales of ~200pc. These four SMGs are also bright [CII] emitters and by considering the L([CII])/\L(FIR) ratio as a function of the star-formation rate surface density I will revisit the [CII] deficit, which these measurement suggest, is consistent with local processes. I will present some of the physical drivers that may be responsible for this trend and can give rise to the properties found in the densest regions of SMGs.

View Astronomy Seminar on Google Maps
N/3.28
Queen's Buildings - North Building
5 The Parade
Newport Road
Cardiff
CF24 3AA

Share this event