Astronomy Colloquium

Image
Image
Crab Nebula Supernova Remnant
September 19, 2019
4:00PM - 5:00PM
Location
E0040 Scott Laboratory

Date Range
Add to Calendar 2019-09-19 16:00:00 2019-09-19 17:00:00 Astronomy Colloquium

ISM Conditions at Cosmic Noon: New Nebular Diagnostics and Mock IFU Observations

Ayan Acharyya - Australian National University

I will talk about comparing our new rest-frame UV and optical emission line diagnostics for star-forming galaxies. We apply these diagnostics, for the first time, to the brightest known lensed galaxy at cosmic noon. We infer nebular properties including the metallicity, ionization parameter, electron temperature and ISM pressure. The combination of diagnostics allows us to probe different ionization zones within the nebula. Our study demonstrates the power of rest-frame UV spectroscopic surveys when combined with these diagnostics and unprecedented sensitivity in the JWST and ELT era. However, the spatial resolution of these surveys might impact the accuracy of measuring the distribution of metals in galaxies. We produce a suite of synthetic IFU data cubes from simulations, to quantify the said effect spatial resolution.

Coffee and Donuts will be served at 3:30pm in 4054 McPherson Lab.

E0040 Scott Laboratory Department of Astronomy astronomy@osu.edu America/New_York public
Description

ISM Conditions at Cosmic Noon: New Nebular Diagnostics and Mock IFU Observations

Ayan Acharyya - Australian National University

I will talk about comparing our new rest-frame UV and optical emission line diagnostics for star-forming galaxies. We apply these diagnostics, for the first time, to the brightest known lensed galaxy at cosmic noon. We infer nebular properties including the metallicity, ionization parameter, electron temperature and ISM pressure. The combination of diagnostics allows us to probe different ionization zones within the nebula. Our study demonstrates the power of rest-frame UV spectroscopic surveys when combined with these diagnostics and unprecedented sensitivity in the JWST and ELT era. However, the spatial resolution of these surveys might impact the accuracy of measuring the distribution of metals in galaxies. We produce a suite of synthetic IFU data cubes from simulations, to quantify the said effect spatial resolution.

Coffee and Donuts will be served at 3:30pm in 4054 McPherson Lab.