CHEN, Chian-Chou (TC)

ESOblog: New survey of exocomet belts is changing what we know about planetary systems New survey of exocomet belts is changing what we know about planetary systems

The Kuiper Belt contains the frozen leftovers of the formation of our Solar System. Using ALMA astronomers can observe similar belts around other stars, and they come in all shapes and sizes! What do they tell us about the formation of planetary systems?

Find out: ➡️ www.eso.org/public/blog/...
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17.01.2025 08:30 — 👍 130    🔁 32    💬 4    📌 7

As astronomers, we're always looking for clear blue skies!
Hello, world! Hello, @bsky.app ! ✨

This drone picture shows the construction site of ESO's Extremely Large Telescope's (ELT), the world's biggest eye on the sky.

📷 ESO/G. Vecchia

17.12.2024 11:46 — 👍 366    🔁 91    💬 30    📌 27

Using dusty galaxies for cosmology? Yes we can! In arxiv.org/pdf/2410.02524 we show that large-scale submm spec-z surveys, like those planned by AtLAST, has the potential to allow percent-level constraints on parameters such as the Hubble constant and curvature, at z>2!🔭🧪

08.10.2024 11:35 — 👍 1    🔁 0    💬 0    📌 0

wow scixplorer.org 🧪🔭

17.07.2024 20:49 — 👍 7    🔁 1    💬 0    📌 0

Super excited to announce that, after almost 30 years of efforts, we finally achieved a full resolution of cosmic infrared background at 450 micron with SCUBA-2, suggesting that CIB, unlike the CMB, is almost completely contributed by dusty galaxies. 🔭🧪

press.asiaa.sinica.edu.tw/ASIAA_TAIWAN...

26.04.2024 10:37 — 👍 4    🔁 0    💬 0    📌 0

Submillimetre galaxies as laboratories for dust grain coagulation Coagulation in the dense interstellar medium (ISM) is an important process that determines the size of the largest grains. We use submillimetre galaxies (SMGs) as laboratories of grain...

Paper day! We use SMGs as a testbed for dust gain coagulation at high-z. In particular, their observed ISM density and emissivity index allow us to rule out unlimited coagulation, and a first constraint on grain velocity threshold can be obtained. 🔭🧪

arxiv.org/abs/2310.04014

12.10.2023 14:40 — 👍 5    🔁 0    💬 0    📌 0

ASIAA Postdoctoral Positions in Observation, Theory, or Instrumentation | AAS Job Register

Looking for a postdoc position at east Asia that allows you to access world-class facilities? We have something like that at ASIAA - both fellowships and regular positions are offered. We also host EACOA fellowship btw! Contact me for further details! jobregister.aas.org/ad/914ed9e1 🔭🧪

02.10.2023 10:18 — 👍 1    🔁 0    💬 0    📌 0

Plot of number counts of submm galaxies with model predictions in good agreement. Faint end is mostly unlensed, bright end is almost entirely lensed. The models predict about 1 percent of faint galaxies are strongly lensed, which is exactly what is seen.

Our paper on a large # of near-IR lenses in Euclid/Roman is on arXiv today, led by my excellent PDRA James Pearson. TL;DR: ~1% of faint SMGs predicted to be strongly lensed, proved with JWST. Observed lensed numbers (blue) cutely skewered at faint end by model prediction 🔭🧪 arxiv.org/abs/2309.00888

06.09.2023 09:03 — 👍 3    🔁 1    💬 0    📌 0