• 2021 Dec 13

# Seminar - Abhijeet Anand (MPI for Astrophysics)

11:00am to 11:30pm

## Location:

Zoom

" The cool CGM in absorption with large spectroscopic surveys"

The gas flows in the circumgalactic medium (CGM) play a pivotal role in several key processes regulating galaxy formation, implying that our understanding of galaxy formation is limited by our current understanding of the CGM. In this talk, I will present the recent constraints that we obtained on the...

• 2021 Dec 02

# ITC Colloquium - Angela Adamo (Stockholm)

11:00am to 12:00pm

## Location:

Zoom

"Star cluster formation and feedback: a close view from the local universe"

Abstract: In spite of the huge observational and numerical progresses made, young star clusters remain, de facto, a challenge to study. Potentially they are considered key tracers of star formation conditions, as well as units of stellar feedback within their host galaxies.  They sit at the intermediate scales of the star formation cycle of galaxies and can therefore unlock the intricate regulator interplay between star formation and feedback that drives to galaxy...

• 2021 Nov 29

# Seminar - Benjamin Horowitz (Princeton)

11:30am to 12:00pm

## Location:

Zoom

" Reconstructing the Cosmic Web at High Noon with Lyman Alpha Tomography"

Cosmic High Noon is defined by the peak of star formation, occurring at z~2.5. Not only is understanding the dynamics of this epoch critical for a unified picture of galaxy formation, but it also plays a critical role in cosmology to connect low redshift measurements to those from the primordial...

• 2021 Nov 22

# Seminar - Zhuo Chen (UCLA)

11:30am to 12:00pm

## Location:

Zoom

" A new window on star formation history at the Galactic Center"

As the closest galactic nucleus, Milky Way's Nuclear Star Cluster (NSC) provides a unique opportunity to resolve the stellar population and to study its composition and star formation in this extreme environment. The limitation in our current understanding of the NSC star formation history is that previous...

• 2021 Nov 18

# ITC Colloquium - Conny Aerts (KU Leuven)

11:00am to 12:00pm

## Location:

Zoom

"Highlights from Gravito-Inertial Asteroseismology"

High-precision photometric light curves assembled by space telescopes have allowed for the probing of stellar interiors via asteroseismology.  Applications

to sun-like stars and red giants are meanwhile standard practise.  After a short introduction, this talk focuses on the recent and challenging case of

gravito-inertial modes in rapidly rotating stars born with a convective core.  We discuss how such modes lead to estimates of the internal rotation and...

• 2021 Nov 15

# Seminar - Jose María Ezquiaga (U Chicago) and Rohan Naidu (Harvard)

11:00am to 12:00pm

## Location:

Zoom

" Probing the standard cosmological model with the population of binary black-holes"

Gravitational-wave (GW) detections are rapidly increasing in number, enabling precise statistical analyses of the population of compact binaries. In this talk I will show how these population analyses cannot only serve to constrain the astrophysical formation channels, but also to learn...

Read more about Seminar - Jose María Ezquiaga (U Chicago) and Rohan Naidu (Harvard)
• 2021 Nov 08

# Seminar - Emily Wilson (RIT) and Mohit Bhardwaj (McGill)

11:00am to 12:00pm

## Location:

Zoom

" Convection in Common Envelopes"

The common envelope (CE) phase of binary evolution is the primary theorized mechanism to produce short-period, compact binaries. The efficiency of energy transfer between the two stars of the CE, $\alpha_{CE}$, and the predicted final separations of these same systems are closely linked. Rather than using a constant ejection efficiency,...

Read more about Seminar - Emily Wilson (RIT) and Mohit Bhardwaj (McGill)
• 2021 Nov 04

# ITC Colloquium - Aleksandra Ćiprijanović (FNAL)

11:10am to 12:00pm

## Location:

Zoom
"Bridging the gap between simulations and survey data - domain adaptation for deep learning in astronomy'

Astronomical surveys are already producing very large datasets, and machine learning will play a crucial role in enabling us to fully utilize all of the available data. Machine lerning models are often initially trained on simulated data and then applyed to observations, which can potentially lead to a substantial decrease in model accuracy on the new target dataset. Simulated and telescope data represent different data domains, and for a machine learning model to work in both...

• 2021 Nov 01

# Seminar - Huanqing Chen (U Chicago) and Dhruba Dutta Chowdhury (Yale)

11:00am to 12:00pm

## Location:

Zoom

" Recovering the Density Fields inside Quasar Proximity Zones at z~6"

The matter density field at z~6 is very challenging to probe. One of the traditional methods that work successfully at lower redshift is the Lyman-alpha forest in quasar spectra. However, at z~6, the residual neutral hydrogen usually creates saturated absorption, thus much of the information about gas...

Read more about Seminar - Huanqing Chen (U Chicago) and Dhruba Dutta Chowdhury (Yale)
• 2021 Oct 28

# ITC Colloquium - Anna Ijjas

11:00am to 12:20pm

## Location:

Zoom
"Entropy, Black Holes, and the Early Universe"

Emerging from a big bang in which gravity is strongly coupled and quantum fluctuations of stress-energy and spacetime are both large, the natural expectation is that the total entropy should be nearly maximal and equally distributed among both stress-energy and gravitational degrees of freedom. However, the observed entropy distribution on the last scattering surface is puzzlingly different, as Penrose has emphasized. In this talk, I will introduce the cosmological entropy problem and discuss our recent proposal to evade... Read more about ITC Colloquium - Anna Ijjas