Yukei Murakami

PhD Student at JHU. Studying the history of the universe (SN Ia cosmology). Musician at Peabody. Occasional photographer. Cal’21. he/him 🇯🇵→@hanada_st

[Yukei Murakami @CosmologicalCat]

Paper day!!
We improved the SH0ES measurement of the local Hubble constant by including the spectroscopic similarity of SNe Ia in the uncertainty/scatter modeling analysis. The updated value is H0 = 73.29±0.90 km/s/Mpc. This is 5.7σ from Planck 2018!
https://t.co/NrOqwlgjzk

[Yukei Murakami @CosmologicalCat]

Finally: I am no longer a fan of this platform, and I am not monitoring replies, messages, and timelines (today I logged in for the first time in a while). Please feel free to message me via email (on the paper) if you have questions or comments. Thanks!

[Yukei Murakami @CosmologicalCat]

https://t.co/Gq7l8Atr0c Paper day! We directly measured the ISM dust extinction law for a galaxy at ~20Mpc away. This galaxy, NGC 5584, is one of the SN Ia and Cepheid hosts used to calibrate SNe in the Hubble diagram. Why do we care about dust? A quick summary:

[Yukei Murakami @CosmologicalCat]

We are continuing to repeat this measurement on several other SH0ES galaxies to provide a statistical view. More to come! (img: the background galaxies used for this study)

[Dan Scolnic @DScol]

A fourth anchor for H0! 🤯 Great work by Louise Breuval, with data in paper, of new H0 Cepheid cross check (74.1±2.1). And yeah, I’m aware of a recent CCHP talk, my suggestion is to wait until there is a paper with data out. With the number of published cross checks (e.g specifically JWST versus HST) and now Louise’s, need to break something badly to get a lower local H0. https://t.co/vzDJ0vbLLa

[Yukei Murakami @CosmologicalCat]

We added one more geometric anchor to the SH0ES analysis! SIP SN covariance matrix is being used too😎Huge congratulations to Louise for amazing work!
https://t.co/ZhvTWmzIPV

[DESI Survey @desisurvey]

Breaking news!🎉 Today we announce the most precise measurements of our expanding Universe using the BAO signal in 6.1 Million galaxies and quasars from Year 1, tracing dark energy through cosmic time. See @BerkeleyLab PR at https://t.co/3BZm4VQU9A 1/10

📸 Credit: @ClaireLamman

[Miguel Zumalacarregui @miguelzuma]

It was very fund to visit @JHUPhysicsAstro after so many years. Thanks for the hospitality!

[Dan Scolnic @DScol]

SH0ES has had many data releases and papers to wade through in 20 years.  There is a preprint (https://t.co/hD9H6UkeMJ) which claims a discrepancy between the 2016 and 2022 releases; we anticipated this in 2022.  If something is confusing, please ask us! 🧵

[Yukei Murakami @CosmologicalCat]

@5hs8 2/4-2/8の夜なら空いてる

[Yukei Murakami @CosmologicalCat]

２月の第２週に京都の学会（GC2024）に参加するのでもし京都付近でお会いできる方いれば連絡ください

[Yukei Murakami @CosmologicalCat]

This plot I made keeps proving itself useful!😏

[Yukei Murakami @CosmologicalCat]

✅first-ever invited lecture at a workshop
✅first-ever academic talk in Japanese
✅first-ever encounter with the Japanese astro community
☑️TMT would be great for future astronomy, with more honest and humble efforts to come

[はなだ @hanada_st]

Pasadenaで開催されたTMT-ACCESSという若手研究者向けTMTワークショップに招待を頂き宇宙論の講演&全日程参加してきました。高校時代にお世話になった国立天文台の方と思いがけない再会をしたり初対面の方と濃密な議論をできたりと、学びを多く得る貴重な機会になりました。ありがとうございました！

[Yukei Murakami @CosmologicalCat]

This is surprisingly good. Some light stir on ice is enough to keep all flavor present

[Yukei Murakami @CosmologicalCat]

An original, herbal and smooth cocktail for a tired PhD student (me):
Equal parts of gin, dry vermouth, maraschino liqueur with four dashes of orange bitter, teaspoon of absinthe, and benedictine. Maraschino cherry would be nice for garnish but I just ran out of them