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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...

    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...

    Read more about ITC Colloquium - Angela Adamo (Stockholm)
  • 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...

    Read more about Seminar - Benjamin Horowitz (Princeton)
  • 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...

    Read more about Seminar - Zhuo Chen (UCLA)
  • 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...

    Read more about ITC Colloquium - Conny Aerts (KU Leuven)
  • 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)

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