Tensions between the Early and the Late Universe

Coordinators: Adam Riess, Tommaso Treu, and Licia Verde

The standard cosmological model successfully describes observations from widely different epochs of the Universe, from primordial nucleosynthesis all the way to the present day. As the basic cosmological parameters of the model are being determined with increasing and unprecedented precision, it is not guaranteed that the same numerical values for the models’ parameters will continue to fit observations from widely different epochs. Discrepancies between observations at early and late cosmological time, if confirmed at high significance, would require an expansion of the standard model, and may perhaps lead to the discovery of new physics.

We wish to bring together experts on these observations and their interpretation, to assess and quantify existing tensions, to stimulate discussion on their implications, and identify the most promising next steps and opportunities. We envision that this conference will foster close collaboration between theorists and observers.

PLEASE NOTE: There are ample opportunities to present a poster at the Conference. Contributed talks for this conference have been selected. You are still welcome to present a poster. Please keep in mind each poster board is 4 feet high x 6 feet wide. We ask that the posters be no larger than 44 inches high x 34 inches wide at the most (it is important to follow these measurements or posters may be turned down due to limited space). 


Invited speakers:

  • Graeme Addison
  • Nabila Aghanim
  • Erik Aver
  • John Blakeslee
  • Anthony Brown
  • Stefano Casertano
  • Tamara Davis
  • Wendy Freedman
  • Sylvia Galli
  • Hendrik Hildebrandt
  • Daniel Holz
  • Insung Jang
  • Lloyd Knox
  • Lucas Macri
  • Grzegorz Pietrzynski
  • Vivian Poulin
  • Mark Reid
  • Dan Scolnic
  • Adam Riess
  • Tommaso Treu
  • Licia Verde
  • Patricia Whitelock
  • Kimmy Wu

2019

Monday, Jul 15, 2019

  • Chair: Dan Holz (U. Chicago) 08:50AM Introducing the Tension Main Seminar Room

    Talks are 30 min + 15 min discussion or 20 min+10min discussion

    • 08:50AM Lars Bildsten (KITP Director) Welcome
    • 09:00AM Adam Riess (STSCI) Local H0 from SH0ES
    • 09:45AM Lloyd Knox (UC Davis) Sounds Discordant
  • 10:30AM MORNING BREAK KITP Courtyard

     

  • 11:00AM Main Seminar Room

     

    • 11:00AM Tommaso Treu (UCLA) Time Delay Cosmography and the Hubble Constant Tension
    • 11:45AM Graeme Addison (Johns Hopkins) Cosmic Microwave Background, Baryonic Acoustic Oscillations and Tensions
  • 12:30PM LUNCH BREAK KITP Courtyard

     

  • Chair: Lloyd Knox (UC Davis) 02:00PM Early Universe Main Seminar Room

    Talks are 30 min + 15 min discussion or 20 min+10min discussion

    • 02:00PM Silvia Galli (IAP-UPMC) The View from Planck
    • 02:45PM Kimmy Wu (U. Chicago) The View from the South Pole Telescope
  • 03:30PM AFTERNOON BREAK KITP Courtyard

     

  • 04:00PM Main Seminar Room

     

    • 04:00PM Eric Aver (Gonzaga Univ.) Helium Abundance and Omega_B
    • 04:30PM Vivian Poulin (LUPM, CNRS) Early Dark Energy
    • 05:00PM Saroj Adhikari (Univ. of Michigan) Super-CMB solution to the Hubble tension
  • 05:30PM SHUTTLE TO BWSCI KITP Courtyard

     

2019

Monday, Jul 15, 2019

  • Chair: Dan Holz (U. Chicago) 08:50AM Introducing the Tension Main Seminar Room

    Talks are 30 min + 15 min discussion or 20 min+10min discussion

    • 08:50AM Lars Bildsten (KITP Director) Welcome
    • 09:00AM Adam Riess (STSCI) Local H0 from SH0ES
    • 09:45AM Lloyd Knox (UC Davis) Sounds Discordant
  • 10:30AM MORNING BREAK KITP Courtyard

     

  • 11:00AM Main Seminar Room

     

    • 11:00AM Tommaso Treu (UCLA) Time Delay Cosmography and the Hubble Constant Tension
    • 11:45AM Graeme Addison (Johns Hopkins) Cosmic Microwave Background, Baryonic Acoustic Oscillations and Tensions
  • 12:30PM LUNCH BREAK KITP Courtyard

     

  • Chair: Lloyd Knox (UC Davis) 02:00PM Early Universe Main Seminar Room

    Talks are 30 min + 15 min discussion or 20 min+10min discussion

    • 02:00PM Silvia Galli (IAP-UPMC) The View from Planck
    • 02:45PM Kimmy Wu (U. Chicago) The View from the South Pole Telescope
  • 03:30PM AFTERNOON BREAK KITP Courtyard

     

  • 04:00PM Main Seminar Room

     

    • 04:00PM Eric Aver (Gonzaga Univ.) Helium Abundance and Omega_B
    • 04:30PM Vivian Poulin (LUPM, CNRS) Early Dark Energy
    • 05:00PM Saroj Adhikari (Univ. of Michigan) Super-CMB solution to the Hubble tension
  • 05:30PM SHUTTLE TO BWSCI KITP Courtyard

     

2019

Tuesday, Jul 16, 2019

  • Chair: Tamara Davis (Queensland) 09:00AM Late Universe I Main Seminar Room

    Talks are 30 min + 15 min discussion or 20 min+10 min discussion

    • 09:00AM Licia Verde (ICC Univ. Barcelona) Chronometers
    • 09:45AM Dan Scolnic (U. Chicago) Type Ia Supernovae
  • 10:30AM MORNING BREAK KITP Courtyard

     

  • 11:00AM Main Seminar Room

     

    • 11:00AM In Sung Jang (Leibniz institut fur Potsdam) Tip of the Red Giant Branch
    • 11:30AM Mark Reid (Harvar-Smithsonian) Masers, NGC 4258, and VLBI Parallax
    • 12:00PM Hendrick Hildebrandt (Ruhr-Uni. Bochum) Weak Lensing and Tensions in LCDM
    • 12:30PM Maggie Sherriffs (KITP) Announcement: Follow on Program
  • 12:30PM LUNCH BREAK KITP Courtyard

     

  • Chair: Mark Reid (Harvard-Smithsonian) 02:00PM Early Meets Late I Main Seminar Room

    Talks are 30 min + 15 min discussion

    • 02:00PM Tamara Davis (Univ. Queensland) Baryonic Acoustic Oscillations
    • 02:45PM Wendy Freedman (U. Chicago) The Carnegie Chicago Hubble Program
  • 03:30PM AFTERNOON BREAK KITP Courtyard

     

  • 04:00PM Main Seminar Room

     

    • 04:00PM Lucas Macri (Texas A&M) Cepheids and other Stellar Pops
    • 04:30PM John Blakeslee (Gemini Obs.) Surface Brightness Fluctuations and H0
    • 05:00PM Andras Kovacs (IAC) More out of Less: an Excess Integrated Sachs-Wolfe from Supervoids Smapped out by the Dark Energy Survey
  • 05:30PM RECEPTION-KITP Courtyard KITP Courtyard

     

  • 06:00PM SPECIAL EVENTS DINNER-KITP Courtyard KITP Courtyard

     

  • 08:00PM SHUTTLE TO BWSCI KITP Courtyard

     

2019

Wednesday, Jul 17, 2019

  • Chair: Wendy Freedman (U. Chicago) 09:00AM Late Universe II Main Seminar Room

    Talks are 30 min + 15 min discussion or 20 min+10 min discussion

    • 09:00AM Daniel Holz (U. Chicago) Standard Sirens and H0
    • 09:45AM Patricia Whitelock (Univ. of Cape Town) Miras
  • 10:30AM MORNING BREAK KITP Courtyard

     

  • 11:00AM Main Seminar Room

     

    • 11:00AM Anthony Brown (Leiden Obs.) Gaia I
    • 11:30AM Stefano Casertano (STSCI) Gaia and HST Parallax
    • 12:00PM Victor Chan (Univ. of Toronto) A Probabilistic Measurement of the Gaia DR2 Zero Point Parallax, and its Impact on the Hubble Constant
  • 12:30PM LUNCH BREAK KITP Courtyard

     

  • Chair: Silvia Galli (IAP-UPMC) 02:00PM Early Meets Late II Main Seminar Room

    Talks are 30 min + 15 min discussion or 20min+10min discussion

    • 02:00PM Grzegorz Pietrzynski (CMAK-PAN) The LMC and Detached Eclipsing Binaries
    • 02:30PM Dillon Brout (Univ. of Penn) The view from the Dark Energy Survey
    • 03:00PM Steve Rodney (South Carolina) Turning Gravitationally Lensed Supernovae into Cosmological Tools
  • 03:30PM AFTERNOON BREAK KITP Courtyard

     

  • 04:00PM Main Seminar Room

     

    • 04:00PM Nabila Aghanim (Orsay, France) Clusters and Tensions
    • 04:30PM Francis-Yan Cyr-Racine (Harvard) Rock ‘n’ Roll, Jazzy, and Classical Solutions to the Hubble Tension
    • 05:00PM David Jones (UCSC) The Role of Type Ia Supernova Host Galaxies in Understanding the Hubble Tension
  • 05:30PM CONFERENCE END SHUTTLE TO BWSCI *Also available to SB Airport and SB Airbus, Goleta location.(See Registration Desk BEFORE Wednesday to sign up.) KITP Courtyard

     

2019

Thursday, Jul 18, 2019

No talks scheduled.

2019

Friday, Jul 19, 2019

No talks scheduled.

2019

Saturday, Jul 20, 2019

No talks scheduled.

2019

Sunday, Jul 21, 2019

No talks scheduled.