Natalie B. Hogg

Cosmologist

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  • The distance duality relation

    The distance duality relation

    The distance duality relation tells us how, assuming that photons propagate on null geodesics in a pseudo-Riemannian spacetime and that their number is conserved, luminosity and angular diameter distances are related, via where dL is the luminosity distance, dA the angular diameter distance and z the redshift. This relation was introduced by Etherington in 1933, […]

    Natalie Hogg

    October 9, 2020
    PhD, Science
    astrophysics, cosmology, distance duality, forecasting, gravitational waves, gravity, mock data, paper, PhD, physics, supernovae
  • Tribalism in science

    Tribalism in science

    Last week, a tweet by Roberto Trotta drew my attention to a recent paper by Simon Portegies Zwart that studied the amount of carbon dioxide emitted by running N-body simulations in different programming languages. The figure that caught my attention was Figure 3, copied below from the version of the paper published in Nature Astronomy. […]

    Natalie Hogg

    September 29, 2020
    Academia, PhD
    astronomy, astrophysics, carbon emissions, climate change, coding, computing, cosmology, hpc, PhD, physics, polarisation, programming, python, Science, social media, supercomputing, tribalism, twitter
  • Year Four

    Year Four

    My early efforts at blog writing were somewhat sporadic, but I did mark some key moments during my PhD, in the posts Year Two and Year Three. In the former, I reflected on the major review that every Portsmouth PhD student must pass in order to progress to their second year. In the latter, I […]

    Natalie Hogg

    September 28, 2020
    PhD
    cosmology, lockdown, organisation, PhD, physics, project, student, time management
  • Keeping a lab diary as a theorist

    Keeping a lab diary as a theorist

    Making a daily log of my thoughts and things I tried saved the final year of my PhD.

    Natalie Hogg

    August 28, 2020
    Academia, PhD, Reviews
    lab diary, notion, organisation, PhD, productivity, student, time management, to do, work diary
  • How asking a question on Stack Exchange kick started my career in research

    How asking a question on Stack Exchange kick started my career in research

    I did my undergraduate degree at Aberystwyth University in Wales. I took the astrophysics course, which ran in parallel to the plain physics degree for the first two years, covering all the basics such as mathematical methods, classical mechanics, waves, optics, thermodynamics and so on. In the third year the astrophysics became the main focus, […]

    Natalie Hogg

    July 27, 2020
    Academia, PhD
    cosmology, independent, initiative, masters, PhD, physics, question, stack exchange, student, study
  • Thesis off-cuts: the ancient history of general relativity

    Thesis off-cuts: the ancient history of general relativity

    I have recently been thinking a lot about what introductory and background material I want to include in my PhD thesis, as my self-imposed December deadline continues to hurtle towards me at an alarming speed. Concurrent with this thinking, I’ve also recently been enjoying a fantastic book called The Poincaré Conjecture by Donal O’Shea, all […]

    Natalie Hogg

    June 27, 2020
    PhD, Science
    cosmology, general relativity, gravity, perelman, PhD, physics, poincare, thesis, thesis off-cuts, topology
  • Travelling during the pandemic

    Travelling during the pandemic

    This week has been a particularly exciting one, and not just due to the XENON experiment result that has set both the arXiv and cosmology Twitter abuzz. Fate finally smiled on me and the Spanish borders have reopened to non-residents, thereby allowing me a small window of opportunity to return to Madrid to collect the […]

    Natalie Hogg

    June 25, 2020
    Academia, PhD, Travel
    coronavirus, flights, madrid, pandemic, PhD, spain, study abroad, Travel
  • The joy of journal clubs

    The joy of journal clubs

    Presenting papers in journal clubs is one of my least favourite things to do. While I enjoy reading in general, I find reading academic papers a chore, especially if the writing is uninspired or the results obscured by reams of unfamiliar theory. However, papers are the currency of academia and, to stretch the analogy, journal […]

    Natalie Hogg

    May 12, 2020
    Academia, PhD
    cosmology, journal club, papers, PhD, physics, publishing
  • An update from lockdown

    An update from lockdown

    At first I refrained from writing about “the situation we currently find ourselves in”, as it has come to be so coyly referred to. I am lucky in that, while I was driven to leave Madrid and return to the UK, the pandemic has not affected my life in any great measure. Only one person […]

    Natalie Hogg

    April 16, 2020
    PhD, Travel
    coronavirus, cosmology, covid19, lockdown, pandemic, PhD, quarantine
  • Homeless due to COVID19! Madrid week nine

    Homeless due to COVID19! Madrid week nine

    I’ll admit it’s a bit of a clickbait-y headline, but yes, on Tuesday I was made homeless due to the coronavirus pandemic. Let me explain. I’m currently living in Madrid, on long-term attachment from my home university of Portsmouth in the UK. I’ve been here since January to work with a collaborator of mine. We […]

    Natalie Hogg

    March 12, 2020
    PhD, Travel
    airbnb, coronavirus, covid19, europe, homeless, lta, madrid, pandemic, PhD, spain, study abroad, Travel, wfh
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