Lisa Steinborn

Postdoc working on AGN in cosmological simulations

[Matthias Steinmetz @GalacticRAVE]

@astrobellatrix even more impressive: She is donating the £2.3m winnings to fund women, under-represented ethnic minority and refugee students to become physics researchers

[Lisa Steinborn @lisa_steinborn]

Thus, if we compare AGN with inactive galaxies in samples matched by the galaxy properties, AGN do not seem to be special anymore. #AGNSpecial18

[Lisa Steinborn @lisa_steinborn]

Of course AGN are special, but we begin to understand why. AGN are a normal evolutionary stage of galaxies and thus, they do preferentially occur in galaxies with certain properties/environments. #AGNSpecial18

[Lisa Steinborn @lisa_steinborn]

Of course AGN are special, but we begin to understand why. AGN are a normal evolutionary stage of galaxies and thus, they do preferentially occur in galaxies with certain properties/environments. #AGNSpecial18

[Rachael Alexandroff @rmalexan]

As we move towards the end how would you summarize #AGNSpecial18 and what have we learned? Stay tuned for my thoughts after the discussion session I am leading with Marcella Brusa and Richard Bower and feel free to comment here!

[Lisa Steinborn @lisa_steinborn]

During this week I got enough new ideas for the next two years :-)

[Lisa Steinborn @lisa_steinborn]

Thank you @SpecialAGN18 for an excellent conference! #AGNSpecial18

[Lisa Steinborn @lisa_steinborn]

Thank you @SpecialAGN18 for an excellent conference! #AGNSpecial18

[Lisa Steinborn @lisa_steinborn]

@LeoBurtscher Well, you still need AGN and/or stellar feedback to heat up the gas, but the model doesn't matter, because you will always balance cooling. But I actually never tested whether stellar feedback alone could do that.

[Leo Burtscher @LeoBurtscher]

However, Richard Bower points out an important selection effect: People who don't believe AGNs are important do not go to this conference. :-) "We need a control sample of random astronomers!" #AGNSpecial18

[Leo Burtscher @LeoBurtscher]

Ryan Hickox: In 2010 we still believed that AGNs are very different from normal galaxy while we now think about Eddington ratio distribution functions and of AGNs as being something normal in the lifetime of an ordinary galaxy. #AGNSpecial18

[Lisa Steinborn @lisa_steinborn]

@LeoBurtscher I would say it depends strongly on the AGN feedback model (see Fig. 9 in Steinborn+15), particularly at high z. Most simulations produce too few quiescent galaxies at high z compared to observations. At low z I would agree that it is not important due to self-regulation.

[Leo Burtscher @LeoBurtscher]

Helpful micro-review of energy-transfer mechanisms in clusters. #AGNspecial18 https://t.co/PUXpbaV3Gh

[AbJ @borkarabhijeet]

Just because there's a mass outflow, that does not mean it will escape, nor does it mean it is driven by the AGN. #AGNSpecial18

[Leo Burtscher @LeoBurtscher]

Therefore look at broad range of ionisation states to find "shocked post star burst galaxies" (SPOGs). Are AGNs active in post-starburst galaxies? Brown+ 2009 found ~ 50%, but Alatalo+ 2017 find only a few percent! #AGNSpecial18

[Leo Burtscher @LeoBurtscher]

Most of her talk was too exciting so I couldn‘t tweet it. :) Here‘s the summary slide — Anca studies pre-merger systems and finds lots of AGN activity in both galaxies. #AGNspecial18 https://t.co/3G1XVWf2ya

[Lisa Steinborn @lisa_steinborn]

@LeoBurtscher felt the same way ;-)

[AbJ @borkarabhijeet]

A confirmed *triple* AGN system which is also very compact! #AGNSpecial18

[Leo Burtscher @LeoBurtscher]

"This is not really a prediction of the model because we worked on the model until this looked like the data." #AGNSpecial18

[Leo Burtscher @LeoBurtscher]

Plot from Rosario et al. 2018 #lasttweet #AGNSpecial18

[Leo Burtscher @LeoBurtscher]

But what really matters is the star formation efficiency. Using the star-formation rate from Herschel and WISE data, we can investigate this – and find again: no difference! #AGNSpecial18 https://t.co/Bww4QADiu4

[Leo Burtscher @LeoBurtscher]

When comparing the difference in the gas fractions between the AGN and control sample, we find no difference. #AGNSpecial18

[Leo Burtscher @LeoBurtscher]

Graphical summary of the ever lasting „AGN vs. star formation“ battle. #AGNSpecial18 https://t.co/yWpMX4mLui