Past Events

  • 2022 Mar 22

    ITC Special Colloquium - Vasily Belokurov (Cambridge)

    11:00am to 12:00pm

    "From dawn till disk: Milky Way's turbulent youth revealed by the APOGEE+Gaia data”

     

    Abstract: 

    We use accurate estimates of aluminium abundance provided as part of the APOGEE Data Release 17 and Gaia Early Data Release 3 astrometry to select a highly pure sample of stars with metallicity $-1.5\lesssim {\rm [Fe/H]}\lesssim 0.5$ born in-situ in the Milky Way proper. We show that the low-metallicity ([Fe/H]$\lesssim -1.3$) in-situ component that we dub Aurora is kinematically hot with an...

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  • 2022 Mar 10

    ITC Luncheon

    12:30pm to 1:30pm

    Location: 

    Phillips

     

     

    Speakers:

    Karin Oberg (Harvard), "Organic Chemistry in Protoplanetary Disks"

    Eric Koch (SMA Fellow), "Detailed neutral ISM kinematics in the Local Group galaxies and the need for synthetic observations"

    Evan Bauer (CfA Fellow), “Mass Estimates for Hypervelocity Runaways from Thermonuclear Supernovae”

     

     

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  • 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...

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  • 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...

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  • 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...

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  • 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)

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