When and Where Does Star Formation Stop? Stellar Mass Assembly and Quenching in Galaxies across Cosmic Time

Gourav Khullar (University of Pittsburgh)

Nov 7, 2023 3:30 PM
Location: Bell Room
Seminar Event

A major challenge in the field of extragalactic astrophysics is understanding when the most massive galaxies assemble the bulk of their stellar mass and quench star formation, across a wide range of redshifts and environments. The Hubble Space Telescope sketched a rough vantage of how the most massive galaxies formed and evolved through hierarchical formation and major mergers. However, the first JWST observations have completely transformed this picture, and called into question our understanding of the largest structures in the Universe, by finding too many, too massive galaxies, too early in cosmic history. In this talk, I describe my work to uncover the physics of the evolution and quenching of massive galaxies, and present state-of-the-art observations and modeling of representative populations of quiescent galaxies across cosmic time, with the JWST survey UNCOVER. I also share my team's work on discovering and characterizing distant gravitationally lensed galaxies -- massive spatially-resolved systems that give us a peek into their sub-galactic structures. Finally, I share my vision for these sub-fields with new observations planned for the upcoming year with JWST, including a new program I am co-leading called LEGGOS -- LEnsing and Galaxy Growth: Observing Substructures, that will revolutionize our understanding of star forming regions within galaxies in the early Universe.




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Past Events

24hrs of Science - From Planets to Particles: An Exploration Mini-Fair

May 3, 2025 10:00 AM to 4:00 PM
Location: Rutherford Physics Building, ground floor
Public event
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Public Panel - "Life on Earth & Beyond"

Prof. Nagissa Mahmoudi & Prof. Richard Leveille (McGill EPS & TSI)

May 1, 2025 7:00 PM
Location: Leacock Building, Room 26
Public Talk
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TSI Seminar - Jonas Zmuidzinas

Jonas Zmuidzinas (Caltech)

Apr 15, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - Gwen Eadie

Gwen Eadie (University of Toronto)

Apr 8, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - Sara Ellison

Sara Ellison (University of Victoria)

Apr 1, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Special Seminar - Scott VanBommel

Scott VanBommel (McDonnell Center for the Space Sciences)

Mar 27, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
Special Seminar
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TSI Seminar - Philipp Moesta

Philipp Moesta (University of Amsterdam)

Mar 25, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - Anna Ho

Anna Ho (Cornell University)

Mar 18, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - Stephen Taylor

Stephen Taylor (Vanderbilt University)

Mar 11, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - Keith McBride

Keith McBride (University of Chicago)

Feb 25, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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50 Years of Gamma-ray Bursts: The Most Powerful Explosions in the Universe

Dr. Lauren Rhodes (McGill)

Feb 18, 2025 7:00 PM
Location: Trottier 0100, Trottier Building 3630 University St, Montréal
Public Talk
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TSI Seminar - Alex Pedersen

Alex Pedersen (Queen's University MacDonald Institute)

Feb 18, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - Gibwa Musoke

Gibwa Musoke (CITA)

Feb 11, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - Smadar Naoz

Smadar Naoz (UCLA)

Feb 4, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - Julie Hlavcek-Larrondo

Julie Hlavcek-Larrondo (Université de Montréal)

Jan 28, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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Into the Deep: Touring a Supermassive Black Hole (or Two!)

Daryl Haggard (McGill University)

Jan 22, 2025 7:00 PM
Location: McConnell Engineering Building 304
Physics Public Talk
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TSI Seminar

Michael L. Wong (Carnegie Science)

Jan 14, 2025 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - Carola Knockwood

Carola Knockwood (Department of Education - Nova Scotia)

Dec 10, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - Philipp Windischhofer

Philipp Windischhofer (University of Chicago)

Dec 3, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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Public Talk: Materials Science of Disasters (TSI & Physics)

Nikolas Provatas (McGill Physics)

Nov 28, 2024 7:00 PM
Location: ENGMC 204 Room, McConnell Engineering Building
Public Outreach
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TSI Seminar - David Hanna's Group

David Hanna's Group (McGill)

Nov 19, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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McGill Physics Hackathon

Nov 15, 2024 6:00 PM to Nov 17, 2024 6:00 PM
Location: Trottier Building
Outreach Event
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TSI Seminar- David Themens

David Themens (Birmingham/UNB)

Nov 12, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - Christopher Omelon

Christopher Omelon (Queen's University)

Nov 5, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
Seminar Event
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Public Talk: Dark Matter Day

TBA

Oct 30, 2024 7:00 PM
Outreach Event
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TSI Seminar- Alan McConnachie

Alan McConnachie (NRC HIA / U. Vic)

Oct 29, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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McGill Open House

Oct 27, 2024 10:00 AM to 4:00 PM
Outreach Event
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TSI Seminar- Andra Stroe

Andra Stroe (Harvard/CfA Clay Fellow)

Oct 22, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar - David Kipping

David Kipping (Columbia University)

Oct 8, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Public Talk - "From Clouds to Cosmic Giants: The formation and evolution of galaxies"

Prof. Tracy Webb (TSI & McGill Physics)

Oct 3, 2024 7:00 PM
Location: ENGTR 0100, Trottier Building, McGill University (3630 University St, Montréal)
Public Talk
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TSI Seminar- Mustafa Amin

Mustafa Amin (Rice University)

Oct 1, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar- Neal Dalal

Neal Dalal (Perimeter Institute)

Sep 24, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI Seminar- Abigail Crites

Abigail Crites (Cornell University)

Sep 17, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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TSI & Physics Outreach Volunteer Picnic

Sep 12, 2024 5:00 PM
Other Event
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TSI Seminar- Karen Alley

Karen Alley (University of Manitoba)

Sep 10, 2024 3:30 PM
Location: Bell Room (Rutherford 103)
TSI Seminar
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