Andrew Robertson

Postdoc at @NASAJPL interested in all things “dark” (or at least dark matter and dark energy)

[Andrew Robertson @astroandrew91]

@DMHunters @DGCerdeno @Roberto_Lineros @RichardMassey The Bullet Cluster with CDM, fading into the @NASA press release. #DMa2Z

[Andrew Robertson @astroandrew91]

@strangequarklet @DanBell__ @aineclareob It’s a nice map! And reminds me, I really need to cycle Coast to coast before disappearing to the US

[Andrew Robertson @astroandrew91]

@strangequarklet @campbellclaret @ArminLaschet @UtaJacques ‘Twas not a bad looking tree

[Andrew Robertson @astroandrew91]

@MayneHelena What is your number?

[Andrew Robertson @astroandrew91]

@ExpertsRs @Ginger_gringo @royalsociety This tells us both about the processes of galaxy formation (how does gas turn into stars, etc.) but also about things like how the Universe has expanded over time, which can help us to learn more about the constituents of the Universe (dark matter, dark energy, etc.)

[Andrew Robertson @astroandrew91]

@ExpertsRs @Ginger_gringo @royalsociety Sorry - Twitter problems at Space Experts HQ, so continuing as me... While a single galaxy does not tell us much, taking a census of more galaxies in the early Universe allows us to build up an understanding of how galaxies formed

[Andrew Robertson @astroandrew91]

@Astropartigirl @astronoliver @article82 Adiabatic contraction enters this model at the level of changing the starting profile from NFW to an adiabatically contracted NFW. This only changes the final profile if it increases the mass within a radius where there has been ~1 scattering per particle over the age of the halo

[Andrew Robertson @astroandrew91]

@Astropartigirl @astronoliver @article82 The model starts with an NFW profile (assumed to be the DM profile in the absence of self-interactions), and then answers the question: “how would this density profile be affected by self-interactions and the (known) baryonic potential?”.

[Andrew Robertson @astroandrew91]

@rcrain_astro @Swnk16 I think I know where my sports personality of the year vote is going...

[Andrew Robertson @astroandrew91]

@amjsmith89 🤦🏻‍♂️

[Andrew Robertson @astroandrew91]

My brain hurts... Can I knock?

[Andrew Robertson @astroandrew91]

@PaddyAlton @a_p_thomson @strangequarklet @jps_astro I was glad to see the @nytimes thinks I’m Scottish even if it isn’t obvious to anyone else! I am intrigued about that small patch somewhere near King’s Lynn 🤔

[Andrew Robertson @astroandrew91]

Being let down by my poor French, but I’m going to assume that ‘grand charlatan’ is a compliment 🤔

[Andrew Robertson @astroandrew91]

A good read from @PaddyAlton (aka Astrophysics Bayesian wizard) on why people, and public servants in particular, can benefit from knowing the basics of computer coding and data analysis.

[Paddy Alton @PaddyAlton]

I gave a webinar earlier this month with @Floppy to a few hundred public servants around the world (via @apoliticalco). Today we've published a companion piece!

We think programming and data literacy are critical in government; here's why:

https://t.co/pgqCP0LxJS

[Andrew Robertson @astroandrew91]

If you are interested in galaxy clusters, gravitational lensing, or funny types of dark matter, it might be worth a read...

[Dark Matters @DarkerMatters]

Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons by @astroandrew91 + https://t.co/e715xVeTdN @ERC_Research @STFC_Matters

[Buffalo Survey @buffalo_survey]

Ready to board in our first BUFFALO Get2together! ! 🐠🌬⛴

[Andrew Robertson @astroandrew91]

At the @DavisCup tennis feeling sorry for #GoUzbeks. That being said, come on GB!!

[Russell Smith @AstroRJS]

Citation of the day in https://t.co/Go0OiEJYbX

[ICC @ICC]

Did we witness the greatest ODI of all time today?

Scotland defended 371 by just six runs to defeat the @MRFWorldwide ranked No.1 side England at The Grange.

Here's how it happened 👇
https://t.co/6kP97G0I6A