Colloquium

  • 2020 Oct 22

    ITC Colloquium - Jennifer Andrews (Arizona) and Diana Powell (UCSC)

    11:00am to 12:00pm

    Location: 

    Zoom
    1. Jennifer Andrews (Arizona)  "Supernova Imposters and the Eruptions of Massive Stars"

      Existing in the magnitude space between traditional supernovae (SNe) and classical novae lies a zoo of explosive and eruptive transients with maximum absolute magnitudes of roughly -10<MV<-15. Traditionally interpreted as giant luminous blue variable (LBV) eruptions these often dubbed “SN imposters” likely arise from a variety of initial stellar masses and are caused by physical mechanisms ranging from instabilities in nuclear burning as the object evolves off the main sequence...
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  • 2020 Oct 29

    ITC Colloquium - Wren Suess (Berkeley) and Jens Chluba (U Manchester)

    11:00am to 12:00pm

    Location: 

    Zoom
    1. Wren Suess (Berkeley)
    2. Jens Chluba (U Manchester)  "Challenges and opportunities with CMB spectral distortions"

      Abstract: CMB spectral distortions provide a unique probe of physical processes occurring the early Universe. Our understanding of how distortion signals are created and what they can tell us about fundamental physics has greatly improved over the past years. In this talk, I will highlight some of the latest developments on the theoretical and experimental frontiers, trying to convince you that the time is ripe for opening a new window into...

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  • 2020 Nov 05

    ITC Colloquium - Daniella Bardalez Gagliuffi (AMNH) and Evan Bauer (UCSB)

    11:00am to 12:00pm

    Location: 

    Zoom
    1. Daniella Bardalez Gagliuffi (AMNH)  "System architectures as fossils of brown dwarf and giant planet formation"

      Brown dwarfs and giant planets share many similarities in their physical properties and atmospheric dynamics, but the most fundamental difference between these two types of objects is the formation pathway that led to their creation. The key to differentiating between formation pathways may lie in their chemical compositions. Recent discoveries have unveiled a number of systems with substellar companions in orbital configurations that are challenging...
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  • 2020 Nov 12

    ITC Colloquium - Bence Kocsis (Oxford) and Carme Gallart (IAC)

    11:00am to 12:00pm

    Location: 

    Zoom
    1. Bence Kocsis (Oxford)
    2. Carme Gallart (IAC) "The History of the Galactic disc and halo from Gaia DR2 HR diagram fitting"

      Abstract: Gaia has provided distances and photometry, and thus colour-magnitude diagrams in the absolute plane, for stars over an unprecedented vast volume in the Milky Way, encompassing significant fractions of the thin and thick disk, and halo. This has allowed us, for the first time, to derive unprecedentedly detailed star formation histories from direct modelling of these colour-magnitude diagrams, using the...

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  • 2020 Nov 19

    ITC Colloquium - Annalisa Pillepich (MPIA-HD) and Shazrene Mohamed (SAAO)

    11:00am to 12:00pm

    Location: 

    Zoom
    1. Annalisa Pillepich (MPIA-HD)
    2. Shazrene Mohamed (SAAO) - "Clues to stellar evolution from the dusty envelopes of interacting binaries"

      The physics of binary interactions is a major source of uncertainty for many problems in astrophysics, from the contributions of stars to the integrated light, dust and gas budgets of galaxies to the elusive progenitors of Type Ia supernovae. In this talk I will review the use of a new generation of 3D models and high resolution observations of dusty interacting binaries (e.g. symbiotic binaries) to test and...

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  • 2020 Dec 03

    ITC Colloquium - Gwen Rudie (Carnegie) and Priya Natarajan (Yale)

    11:00am to 12:00pm

    Location: 

    Zoom
    1. Gwen Rudie (Carnegie)  "The Circumgalactic Medium of Star-Forming Galaxies during Cosmic Noon"

      The exchange of baryons between galaxies and their surrounding intergalactic medium (IGM) is a crucial but poorly-constrained aspect of galaxy formation and evolution. I will present results from the Keck Baryonic Structure Survey (KBSS), a unique spectroscopic survey designed to explore both the physical properties of high-redshift galaxies and the connection between these galaxies and their surrounding intergalactic baryons. The KBSS is optimized to trace the cosmic...

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