Zieba, Zwintz, Kenworthy++ use the internal Delta Scuti-like pulsation modes (which are very stable) in Beta Pictoris to search for the presence of the exoplanets Beta Pic b and c but additional modes appear and disappear, unfortunately hiding the signal - a very impressive effort! #astrodon 🔭🪐 https://arxiv.org/abs/2406.04870
Spectacular ideal MHD simulations of AGN feedback in the multi-phase gas of a Perseus-like cluster of galaxies, using AthenaK on GPUs, by
Fournier et al. (incl @HambObs ) today on #astroph
: https://arxiv.org/abs/2406.05044
Even though night mode on the iPhone is capable of seeing pretty faint stars, some times it’s nice to have a bit of cloud to block them out & make the constellations more visible 🤷♂️
Here’s the Ursa Major (the plough or big dipper) over the Peterstal, with its famous “arc to Arcturus” along the handle to the left 🧸
Credits:
Processing: Andrea Luck CC BY
Image data: INAF/LargeBinocularTelescope Observatory/Georgia State University
IRV-band observations by SHARK-VIS@LBT [P.I. F. Pedichini]
Are astronomers on the brink of discovering a new celestial object?
Recently, astronomers have been discovering an emerging population of astrophysical objects that resemble neutron stars, but with longer rotation periods. This unique population is challenging our understanding of how these objects form and how they emit radiation.
I got to speak with this exciting new paper’s lead author, Dr Manisha Caleb from The University of Sydney, about this remarkable discovery, which was first found by CSIRO's #ASKAP telescope located in WA.
What if we are on the precipice of something big here? These are def. very exciting times for geeks like me!
I have a Love/Hate (mostly Hate) relationship with the Ars Technica comments section, particularly where space is concerned, but it's heartening to see this pro-#ChandraXRay comment sitting on 94 updoots to 0 downdoots on the Hubble Gyro article.
It has been a bit disheartening the past three months to worry about our healthy, productive, and unique mission being terminated abruptly, and so it's good to see the public is getting that message.
@skrishna I've seen you post about that, and it's greatly appreciated! As someone with minimal reach and who needs to be mindful of not appearing to be lobbying on company time, I (and the rest of the CXO folks) really appreciate those of you with audiences speaking up for us!
Bonse+ present a new high contrast imaging algorithm “4S - Signal-Safe Speckle Subtraction” demonstrated with the pre-recovery of the exoplanet AF Lep b from 2011 NaCo data. The software webpage has an interactive figure where you can play with and see the improvement over PCA. Nice! #astrodon 🔭🪐 https://arxiv.org/abs/2406.01809
Some planets are born alone, live alone, and die alone. The ESA's Euclid space telescope just found a nest of these loners in the constellation Orion.
At least the rogue planets have chosen a gorgeous spot to go about their business: This is where the newfound worlds are hanging out (toward the top of the image).
#SimulatedUniverses :
cosmic rays injected by different processes in my simulation - zoom into a void surrounded by filaments.
ENZO simulations on LEONARDO cluster at CINECA. #astrodon#astronomy
#JWST is often cited for its amazing work with galaxies, BUT LOOK AT IT DISSECTING UP THE CRAB NEBULA AND SHOWING US STAR GUTS FROM A 1000-YEAR OLD STELLAR DETONATION.
Wow! Look at the pulsar!
So epic that we can see this detail, the different structures, elements, velocities, energies, etc. from an event that Chinese and Japanese astronomers witnessed and documented 1000 years back.
We're connected through time with this event to them!