Past Events

  • 2021 Feb 04

    ITC Colloquium - Matteo Cantiello (Flatiron)

    11:00am to 12:00pm

    Location: 

    Zoom
    "Stellar Evolution in AGN Disks"

    I will discuss the exotic evolution of stars embedded in AGN disks, showing that in sufficiently dense and cold regions rapid accretion can lead to the formation of massive and very massive objects. These stars undergo core-collapse, leave behind compact remnants and contribute to polluting the disk with heavy elements. I will show that AGN stars can have a profound impact on the evolution of AGN metallicities, as well as the production of gravitational waves sources observed by LIGO-Virgo. AGN stars can also lead to the formation of short and... Read more about ITC Colloquium - Matteo Cantiello (Flatiron)
  • 2021 Jan 28

    ITC Colloquium - Anthony Brown (Leiden)

    11:00am to 12:00pm

    Location: 

    Zoom
    "Gaia Early Data Release 3: First science results"

    I will present a brief summary of Gaia EDR3 accompanied by highlights from the early science results based on this data release.
  • 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 peak...

    Read more about ITC Colloquium - Gwen Rudie (Carnegie) and Priya Natarajan (Yale)
  • 2020 Nov 19

    ITC Colloquium - Annalisa Pillepich (MPIA-HD)

    11:00am to 12:00pm

    Location: 

    Zoom
    1. Annalisa Pillepich (MPIA-HD) "The many diverse manifestations of supermassive black-hole feedback"

      Feedback from super massive black holes is commonly invoked in state-of-the-art large-scale cosmological galaxy simulations to halt star formation in massive galaxies. In fact, no other mechanism so far has been shown to be capable of returning entire populations of simulated massive quenched galaxies that are consistent with the observed red sequence and quenched fractions. In this talk, I will use the IllustrisTNG cosmological simulations of galaxies to gain insights and...
    Read more about ITC Colloquium - Annalisa Pillepich (MPIA-HD)
  • 2020 Nov 12

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

    11:00am to 12:00pm

    Location: 

    Zoom
    1. Bence Kocsis (Oxford)  "On the AGN Origin of Gravitational Wave Sources observed by LIGO/VIRGO"

      With the detection of gravitational waves emitted during black hole and neutron star mergers, LIGO has recently opened the field of gravitational wave astrophysics. In this talk I will review the astrophysical processes that may be responsible for the formation of the observed events. The event rate distribution with mass, spins, eccentricity and redshift may be used to discriminate among different processes that lead to black hole mergers. I will show that the standard...

    Read more about ITC Colloquium - Bence Kocsis (Oxford) and Carme Gallart (IAC)
  • 2020 Nov 05

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

    11:00am to 12:00pm

    Location: 

    Zoom

    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 to...

    Read more about ITC Colloquium - Daniella Bardalez Gagliuffi (AMNH) and Evan Bauer (CfA)
  • 2020 Oct 29

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

    11:00am to 12:00pm

    Location: 

    Zoom
    1. Wren Suess (Berkeley) "The growth & transformation of galaxies across cosmic time"

      Deep surveys have allowed us to chart the evolution of galaxies from billions of years ago through to the present day with unprecedented precision. We’ve learned that the properties of both star-forming and quiescent galaxies— including stellar masses, structures, star formation rates, gas content, and kinematics— change dramatically with redshift. Despite this progress, several key questions remain unsolved in our current view of galaxy evolution. We still don’t understand how...

    Read more about ITC Colloquium - Wren Suess (Berkeley) and Jens Chluba (U Manchester)
  • 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...
    Read more about ITC Colloquium - Jennifer Andrews (Arizona) and Diana Powell (UCSC)
  • 2020 Oct 15

    ITC Colloquium - Jun Makino (Kobe University) and Wenbin Lu (Caltech)

    11:00am to 12:00pm

    Location: 

    Zoom
    1. Jun Makino (Kobe University) "Title: Frameworks for large-scale astrophysical simulations"

      Abstract:

      In the last three decades, it has been becoming more and more difficult to develop applications which can achieve high, or even modest, efficiency on advanced HPC systems. The development of highly efficient and highly scalable software for modern HPC systems like K or Fugaku requires multi-year effort of a team of researchers with exceptional talents.  We have been working on a new approach to solve this problem through the use of...
    Read more about ITC Colloquium - Jun Makino (Kobe University) and Wenbin Lu (Caltech)
  • 2020 Oct 08

    ITC Colloquium - Jorge Penarrubia (U Edinburgh) and Kishalay De (Caltech)

    11:00am to 12:00pm

    Location: 

    Zoom
    1. Jorge Penarrubia (U Edinburgh)  "Impact of `dark' microhaloes on the dynamics of stars & planetary systems"

      In the current cosmological paradigm (Cold Dark Matter, CDM), galaxies like the Milky Way are teeming with dark matter substructures with masses as low as that of Earth (M~10^{-6} Msol), or even of asteroids (M~10^{-12} Msol). These objects do not contain baryons, and can only be detected through their gravitational attraction. However, to date it remains unclear to what extent such puny microhaloes affect the motion of visible objects.
      In this talk, I...
    Read more about ITC Colloquium - Jorge Penarrubia (U Edinburgh) and Kishalay De (Caltech)

Pages