Lake Claremont, Western Australia
@TheRealIanKemp
- 9 Followers
- 24 Following
- 29 Posts
Ben & Jesse's 15yo son Sam Ruthe run a mile in 3:58 https://youtu.be/8JHSXyOtfhw?si=fefYuHO41oot6VHu
SAM RUTHE SUB 4 MINUTE MILE - 3:38.35 at 15 years old
Sea ice and icebergs off the coast of Antarctica (near Casey station). The blocks in the sea ice are about 100m wide
Try asking a racist if he's a racist. This is what Australia has come to now... After 37 years I rhink maybe it's time to leave
Kuala Lumpur: it's a lovely city and if you stay away from the food courts and tourist traps it has some of the yummiest food in the world! One time we went to the shopping mall Times Square (which has a roller coaster inside). We ignored the restaurants and cafes near the ground and went up to level ?10? which is where the shop workers eat. The best food ever 🙂
Trump has proposed a US takeover of Gaza, expelling the population and turning it into a beachside real estate opportunity. I'd like to know what members of the US military have to say about that, but of course they're not allowed to
A great one to wake up to: JS Bach's "Wir Eielen". Performed in Perth, I'm not sure of the venue but it looks like Leederville Town Hall in Cambridge Street. https://youtu.be/eh3LlnC15Z0
Bach Wir Eilen - Festival Baroque Australia
Two in one day! #2 Co-author paper, led by Frances Buckland-Willis published today in the journal Astronomy & Astrophysics https://www.aanda.org/articles/aa/full_html/2025/01/aa52645-24/aa52645-24.html
Two in one day! #1 Co-author paper, led by Callum Lynn published today in the journal Monthly Notices of the Royal Astronomical Society https://ui.adsabs.harvard.edu/abs/2025MNRAS.536.3538L/abstract
Considerations with stacking absorption spectra: cold H I gas in cirrus region of the Milky Way
We use the Milky Way neutral hydrogen (H I) absorption and emission spectra from the Galactic Australian Square Kilometre Array Pathfinder (GASKAP) Phase II Pilot survey along with toy models to investigate the effects of stacking multicomponent spectra on measurements of peak optical depth and spin temperature. Shifting spectra by the peak in emission, 'primary' components shifted to 0 km s<inline-formula><tex-math id="TM0001" notation="LaTeX">$^{-1}$</tex-math></inline-formula> are correctly averaged. Additional components on individual sightlines are averaged with non-centred velocities, producing a broader and shallower 'secondary' component in the resulting stack. Peak optical depths and brightness temperatures of the secondary components from stacks are lower limits of their true average values due to the velocity offset of each component. The spin temperature however is well correlated with the truth since the velocity offset of components affects the emission and absorption spectra equally. Stacking 462 GASKAP absorption-emission spectral pairs, we detect a component with a spin temperature of <inline-formula><tex-math id="TM0002" notation="LaTeX">$1320 \pm 263$</tex-math></inline-formula> K, consistent with gas from the unstable neutral medium and higher than any previous GASKAP detection in this region. We also stack 2240 pilot survey spectra containing no Milky Way absorption, revealing a primary narrow and secondary broad component, with spin temperatures belonging to the cold neutral medium (CNM). Spatially binning and stacking the non-detections across the plane-of-sky by their distance from CNM absorption detections, the primary component's optical depth decreases with distance from known locations of cold gas. The spin temperature however remains stable in both components, over an approximate physical plane-of-sky distance of <inline-formula><tex-math id="TM0003" notation="LaTeX">$\sim 100$</tex-math></inline-formula> pc.