Merton College, Oxford
Merton College, Oxford
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The 38th Ockham lecture: 'Chasing cosmic dawn with the James Webb Space Telescope'
Given by Professor Charlotte Mason, Merton College (MPhys 2013) Associate Professor, Cosmic Dawn Center, Niels Bohr Institute, University of Copenhagen.
There is a missing chapter in our Universe's history: when and how did the first stars and galaxies form? The first stars drove the Universe's final phase transition by heating and ionising intergalactic gas, setting the stage for all subsequent structure formation. Until recently this has been the realm of theorists alone, but, with the launch of the James Webb Space Telescope (JWST) in December 2021, our observational horizon has expanded to the first few hundred million years after the Big Bang. JWST is the largest telescope ever launched into space and was designed to observe directly this period of "Cosmic Dawn", using atomic-hydrogen transitions to search for the first galaxies.
Excitingly, JWST has discovered a large number of bright galaxies in the early Universe, implying galaxy formation may have proceeded very differently than expected by theoretical models. I will review our current picture of galaxy formation and how it is being tested by JWST. I will describe possible explanations for the new observations and prospects for JWST to distinguish between these scenarios and to help us understand the primary physics driving the formation of the first galaxies.
zhlédnutí: 2 414

Video

Preparing for Oxford admission tests
zhlédnutí 311Před 3 měsíci
Merton students answer 'How did you prepare for admissions tests?'
Choosing which Oxford College to apply to
zhlédnutí 186Před 3 měsíci
Merton students answer 'How did you choose your College?'
Getting accepted at an Oxford College
zhlédnutí 172Před 3 měsíci
Merton students answer 'How did you feel when you got accepted?'
Expectations vs Reality
zhlédnutí 350Před 3 měsíci
Merton students answer 'How does Merton meet or differ from your expectations?'
The interview process
zhlédnutí 145Před 3 měsíci
Merton students answer 'How did you find your interview?'
Attending open days
zhlédnutí 67Před 3 měsíci
Merton students answer 'Did you attend an open day?'
How did you choose your course?
zhlédnutí 58Před 3 měsíci
Merton students answer 'How did you choose your course?'
What you wish you had known before you applied to an Oxford College
zhlédnutí 75Před 3 měsíci
Merton students answer 'Is there anything you wish you had known before you started the application process?'
The 37th Ockham Lecture: 'Emergent laws of physics and biological simplicity'
zhlédnutí 513Před 7 měsíci
'I will discuss "biological simplicity" new laws of (statistical) physics emerging in complex living systems. I will give examples of such laws in systems with many interacting components, such as brains or viral-immune co-evolution. Trying to understand these laws in the framework of statistical physics of the more traditional, inanimate world will open up somewhat unexpected connections betwe...
The Holly and the Ivy carol - December 2023
zhlédnutí 1,2KPřed 7 měsíci
Merton College Choir sing the Matthew Owens arrangment of The Holly and the Ivy in Merton College Chapel.
Merton College Christmas 2022
zhlédnutí 1,6KPřed rokem
Merry Christmas from Merton College! Featuring the Merton College Girl Choristers and the Merton College Choir, with a Christmas message from the outgoing Warden, Professor Irene Tracy CBE FMedSci.
Short introduction to History and the Joint Schools with History interviews at Merton College
zhlédnutí 500Před rokem
This is a short video introduction from the Merton History Tutors for candidates being interviewed for History and the Joint Schools with History at Merton. In the video, the members of the interview team introduce themselves, giving a brief overview of their academic interests and recent research. They also provide some practical information about the interview process and what to expect in th...
Merton College Christmas Video 2020
zhlédnutí 2,4KPřed 3 lety
Season's Greetings from everyone at Merton College.
Everything you ever wanted to know about Merton...
zhlédnutí 11KPřed 4 lety
Everything you ever wanted to know about Merton...
Merton College Open Day Tour
zhlédnutí 5KPřed 4 lety
Merton College Open Day Tour
The 32nd Ockham Lecture ‘The Physics of Can and Can’t’
zhlédnutí 24KPřed 4 lety
The 32nd Ockham Lecture ‘The Physics of Can and Can’t’
The 30th Ockham Lecture - 'Life’s a Beach'
zhlédnutí 384Před 4 lety
The 30th Ockham Lecture - 'Life’s a Beach'
The 29th Ockham Lecture 'Confirmation, Conviction and Cosmology'
zhlédnutí 303Před 4 lety
The 29th Ockham Lecture 'Confirmation, Conviction and Cosmology'
The 31st Ockham Lecture - 'To Hell and Back with a NASA Spacecraft'
zhlédnutí 209Před 4 lety
The 31st Ockham Lecture - 'To Hell and Back with a NASA Spacecraft'
Advent Carol Service, 1 December 2019
zhlédnutí 4KPřed 4 lety
Advent Carol Service, 1 December 2019
'Te Deum Laudamus'
zhlédnutí 19KPřed 4 lety
'Te Deum Laudamus'
'Poetry as Prayer' with Pádraig Ó Tuama
zhlédnutí 9KPřed 5 lety
'Poetry as Prayer' with Pádraig Ó Tuama
The 27th Ockham Lecture: Reductionism vs Bootstrap: Are Things Big Always Made of Things Elementary?
zhlédnutí 1,4KPřed 5 lety
The 27th Ockham Lecture: Reductionism vs Bootstrap: Are Things Big Always Made of Things Elementary?
Merton College Christmas Video 2018
zhlédnutí 1,7KPřed 5 lety
Merton College Christmas Video 2018
Advent Carol Service, 25 November 2018
zhlédnutí 8KPřed 5 lety
Advent Carol Service, 25 November 2018
The 24th Ockham Lecture - 'Beyond the Higgs Discovery: The Coming of Age of ATLAS and the CERN LHC'
zhlédnutí 370Před 6 lety
The 24th Ockham Lecture - 'Beyond the Higgs Discovery: The Coming of Age of ATLAS and the CERN LHC'
The 21st Ockham Lecture - 'Nuclear Forensics'
zhlédnutí 432Před 6 lety
The 21st Ockham Lecture - 'Nuclear Forensics'
The 22nd Ockham Lecture - ‘From High Carbon Baby to Low Carbon Boardroom’
zhlédnutí 56Před 6 lety
The 22nd Ockham Lecture - ‘From High Carbon Baby to Low Carbon Boardroom’
The 25th Ockham Lecture - ‘Extreme Computing for the SKA Radio Telescope’
zhlédnutí 198Před 6 lety
The 25th Ockham Lecture - ‘Extreme Computing for the SKA Radio Telescope’

Komentáře

  • @RichardDLewis41
    @RichardDLewis41 Před 7 lety

    The problem with quantum superposition is the assumption that a physical system can be simultaneously in two different states. Quantum superposition may be a useful model to predict the outcome of an experiment but in reality the system is in a single evolving state. This applies to macroscopic (Schrodinger's cat) and microscopic (atomic level) systems. Observers have nothing to do with this. It is real physical detectors interacting with real physical waves that determine experimental results. www.academia.edu/5927513/The_Spacetime_Wave_Theory Richard

  • @RichardDLewis41
    @RichardDLewis41 Před 7 lety

    The basic problem is with the standard interpretation of quantum mechanics. Looking at a specific example of the light interference experiment, we must interpret the light quantum (photon) as a real physical wave which is dispersed in space. The nature of the dispersion in space is revealed by the detection screen. When the photon reaches the screen it interacts with a specific atom of the detection screen. An orbital electron of this atom absorbs the photon even though it is spread out. The detector is playing an active role in the experiment. We should not consider that the wave is collapsing and then hitting the detector but rather that the interaction of the incoming light wave with the screen operates in a probabilistic way to result in the interference pattern. The measurement process is then the interaction of a photon with an orbital electron. There is no measurement problem when the nature of reality is considered in the spacetime wave theory. www.academia.edu/5038836/The_Unification_of_Physics www.academia.edu/5927513/The_Spacetime_Wave_Theory Richard

  • @lawrencemiller3081
    @lawrencemiller3081 Před 7 lety

    Why hasn't anyone concluded the obvious... that the actual instrument used to measure has introduced some level of resistance which alters the behavior of the subject? The instrument is causing interference.

  • @RichardDLewis41
    @RichardDLewis41 Před 7 lety

    The quantum measurement problem and many other difficulties of quantum theory are resolved by establishing a new perspective on the nature of reality. Look at experimental results from the point of view of the spacetime wave theory. More about the Spacetime Wave Theory here: www.academia.edu/5927513/The_Spacetime_Wave_Theory Or search Google for: Richard Lewis The Spacetime Wave Theory

  • @vectorshift401
    @vectorshift401 Před 9 lety

    This is speculative metaphysics. No empirical differences are brought up. There are always different ways of describing anything. Different ways of describing exactly the same observations are just arguing semantics.

  • @matthewakian2
    @matthewakian2 Před 10 lety

    Good to hear this project is progressing positively.

  • @ThunderChunky101
    @ThunderChunky101 Před 10 lety

    "I seem to remember that the thing does not exist until it is known or viewed by a being" Actually that's not true.

  • @justintruth
    @justintruth Před 10 lety

    So it seems we have our world and then we have those possible other worlds that are the result of the branching evolution of one instant of our world and then we have those possibilities that have nothing to do with our world. so why place the second set of worlds in the set of actuals instead of non actual possibles. If the worlds were observable clearly they would be but can a"mere" theory confer actuality? where lies the burden of proof? Ask Occam?

  • @QuaaludeCharlie
    @QuaaludeCharlie Před 11 lety

    I seem to remember that the thing does not exist until it is known or viewed by a being , if we are watching the cat then , if the cat died we would have the answer , there is still the chance that it could be relative to the viewer , in that case God does play dice :) QC

  • @Nashsync
    @Nashsync Před 11 lety

    I didn't quite understand . James is saying the state of the result is defined by the state of the measuring instrument. If that is so then this state of the measuring instrument changes depending on where we take the measurement ( before the slit to know which slit the particle goes through or after the slit where we observe interference) .So in essence the measuring instrument itself is in multiple state (or in many world)..i am confused here probably I misunderstood what he is saying.