Past Events

  • 2022 Mar 10

    ITC Colloquium - Timothy Davis (Cardiff)

    11:00am to 12:00pm

    Location: 

    Zoom

    "Tracing out the darkness with cold gas: dynamically probing galaxy evolution"

    In this talk I will describe how mapping the dynamics of gas clouds in the centre of galaxies can help us to constrain a wide range of astrophysical problems. From the enigmatic relation between galaxies and their supermassive black holes, to the suppression of star-formation in dying galaxies, the dynamics of cold gas provides an ideal probe that can help us make progress. I will show how parsec resolution observations can be used to estimate the masses of supermassive black holes in galaxies...

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  • 2022 Mar 03

    ITC Colloquium - Alis Deason (Durham)

    11:00am to 12:00pm

    Location: 

    Zoom

    “Dwarf galaxy stellar haloes”

     

    The hierarchical nature of structure formation predicts that haloes grow by the aggregation of several lower-mass "clumps". A natural consequence of this process is the existence of an extended halo of stars surrounding galaxies, which is built up from the debris of destroyed lower mass objects. The nature of these haloes has been studied extensively from Milky Way to cluster-mass systems. However, the stellar haloes of dwarf galaxies have been given relatively little attention.  In this talk, I will discuss...

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  • 2022 Feb 24

    ITC Colloquium - Plamen Krastev (Harvard)

    11:00am to 12:00pm

    Location: 

    Zoom
    "AI for Gravitational Waves and Dense Matter"

     

    The groundbreaking discoveries of gravitational waves from binary black-hole mergers and, more recently, coalescing neutron stars started a new era of Gravitational-Wave Astrophysics and revolutionized our understanding of the Cosmos. Deep learning algorithms, such as artificial neural networks, are already transforming many scientific and technological fields, and have also proven successful in gravitational-wave astrophysics for detection and parameter estimation of gravitational-wave signals from binary black holes. In...

    Read more about ITC Colloquium - Plamen Krastev (Harvard)
  • 2022 Feb 17

    ITC Colloquium - Chanda Prescod-Weinstein (UNH)

    11:00am to 12:00pm

    Location: 

    Zoom

    "Cosmic Probes of the Dark Sector"


    Abstract: In this talk, I will describe my efforts to understand the nature of the mysterious dark matter. I will give some insight into how I am using a range of tools -- model building, computation, and neutron stars -- to get at the basic question of “what is the statistical mechanics of dark matter?” I will show that the details of ultralight axion models can shift the astrophysical phenomenology and also that neutron stars are potentially interesting dark matter constraint laboratories. From the optical to the X-ray and gamma-ray...

    Read more about ITC Colloquium - Chanda Prescod-Weinstein (UNH)
  • 2022 Feb 10

    ITC Colloquium - Joan Najita (NOAO)

    11:00am to 12:00pm

    Location: 

    Zoom
    "How Protoplanetary Disks Accrete — New Insights from Disk Sizes and IR Spectroscopy"


    Physical processes that redistribute or remove angular momentum from protoplanetary disks can drive mass accretion onto the star and affect the outcome of planet formation. Despite ubiquitous evidence for accretion, the process(es) responsible remain a mystery. I will describe how measurements of disk sizes and IR spectroscopy of nearly edge-on disks may shed new light on this long-standing problem, in the latter case by directly probing disk accretion in action! The results may provide evidence for...

    Read more about ITC Colloquium - Joan Najita (NOAO)
  • 2022 Feb 03

    ITC Colloquium - Kimitake Hayasaki (Chungbuk National University)

    11:00am to 12:00pm

    Location: 

    Zoom
    "High-energy neutrino emission associated with tidal disruption events"

    Tidal disruption events (TDEs) are a good probe of supermassive black holes (SMBHs) at the center of inactive galaxies. A star approaches the SMBH in a parabolic orbit, is destroyed by the SMBH tidal force. The disrupted remnant falls back to the SMBH, producing a characteristic flare that lasts for several months. Recent multi-wavelength and multi-messager observations have revealed the diversity of TDEs. In fact, three unusual TDE candidates (AT2019dsg, AT2019fdr, and AT2019aalc) shine brightly in optical and UV... Read more about ITC Colloquium - Kimitake Hayasaki (Chungbuk National University)
  • 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...

    Read more about Seminar - Abhijeet Anand (MPI for Astrophysics)
  • 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...

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  • 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...

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