Tootfinder

Identifying the secondary jet in the RadioAstron image of OJ~287
Mauri J. Valtonen, Lankeswar Dey, Staszek Zola, Alok C. Gupta, Shubham Kishore, Achamveedu Gopakumar, Paul J. Wiita, Minfeng Gu, Kari Nilsson, Zhongli Zhang, Rene Hudec, Katsura Matsumoto, Marek Drozdz, Waldemar Ogloza, Andrei V. Berdyugin, Daniel E. Reichart, Markus Mugrauer, Tapio Pursimo, Stefano Ciprini, Tatsuya Nakaoka, Makoto Uemura, Ryo Imazawa, Michal Zejmo, Vladimir V. Kouprianov, James W. Davidson, Jr., Alberto …

Identifying the secondary jet in the RadioAstron image of OJ~287
The 136 year long optical light curve of OJ~287 is explained by a binary black hole model where the secondary is in a 12 year orbit around the primary. Impacts of the secondary on the accretion disk of the primary generate a series of optical flares which follow a quasi-Keplerian relativistic mathematical model. The orientation of the binary in space is determined from the behavior of the primary jet. Here we ask how the jet of the secondary black hole projects onto the sky plane. Assuming that…

Wenn putin nie an die macht gekommen wäre... das würde bedeuten dass Gorbatschow an der Macht geblieben wäre. Länger als es tatsächlich der fall war. Hätte er russland in eine gesellschaft formen können, die nicht dazu bereit ist in die ukraine einzufallen? Oder wäre dennoch putin oder ein anderer putin gekommen? Später oder genauso schnell oder sogar früher?

This from a top expert on Antarctica's Thwaites Glacier.
Highly likely that we're committing to an additional 3 meters (10 ft) of sea level rise as we speak. Yes, it'll take time to fully materialize, but when will the enormous damage that we're signing up for sink in with voters and policy makers?
https://

Rob Larter (@PoLaRobs@fediscience.org)
Attached: 1 image In summary, the outlook is grim. It is highly likely that Thwaites Glacier will eventually be lost, which will destabilise adjoining parts of the West Antarctic Ice Sheet, increasing the committed long-term rise in global mean sea level by more than 3 m.

Spent time today helping a VAR upgrade from one support appliance to another. Not my job but I get sucked into these things. While racking the new one I found an unknown box in the rack. "What is this?" "Oh, thats <vendor>'s box. We stopped using them years ago." Cue me finding a Ubuntu 16.04 box STILL ON OUR NETWORK FROM A VAR WE DON'T USE. Keep in mind, these are the same folks that run around screaming about security. Some days I really want to just wa…

Signal processing and data acquisition system for the BTO detectors onboard COSI
Shunsaku Nagasawa, Tadayuki Takahashi, Kazuhiro Nakazawa, Hannah Gulick, Claire Chen, Hiroki Yoneda, Keigo Okuma, Matt Dexter, Josh Forgione, Nihal Gulati, Andrew Ji, Kaylie Ching, Isabel Schmidtke, Sarah Jauregui, Eric Yang, Andreas Zoglauer, Juan Carlos Martinez Oliveros, John Tomsick

Signal processing and data acquisition system for the BTO detectors onboard COSI
The energy range from a few hundred keV to a few MeV includes important probes such as nuclear gamma-rays and the 511 keV annihilation line. However, compared to X-rays and GeV/TeV gamma-rays, this range suffers from lower sensitivity by orders of magnitude. The upcoming NASA SMEX satellite mission Compton Spectrometer and Imager (COSI), scheduled for launch in 2027, is expected to break through this limitation with its Compton telescope utilizing a germanium semiconductor detector, covering th…

Control of Covalent Bond Enables Efficient Magnetic Cooling
Xin Tang, Yoshio Miura, Noriki Terada, Enda Xiao, Shintaro Kobayashi, Allan Doring, Terumasa Tadano, Andres Martin-Cid, Takuo Ohkochi, Shogo Kawaguchi, Yoshitaka Matsushita, Tadakatsu Ohkubo, Tetsuya Nakamura, Konstantin Skokov, Oliver Gutfleisch, Kazuhiro Hono, Hossein Sepehri-Amin
https://

Control of Covalent Bond Enables Efficient Magnetic Cooling
Magnetic cooling, harnessing the temperature change in matter when exposed to a magnetic field, presents an energy-efficient and climate-friendly alternative to traditional vapor-compression refrigeration systems, with a significantly lower global warming potential. The advancement of this technology would be accelerated if irreversible losses arising from hysteresis in magnetocaloric materials were minimized. Despite extensive efforts to manipulate crystal lattice constants at the unit-cell le…

Impact of projection-induced optical selection bias on the weak lensing mass calibration of galaxy clusters
Titus Nyarko Nde, Hao-Yi Wu, Shulei Cao, Gladys Muthoni Kamau, Andrius Tamosiunas, Chun-Hao To, Conghao Zhou
https://arxiv.org/abs/2510.00753

Impact of projection-induced optical selection bias on the weak lensing mass calibration of galaxy clusters
Weak gravitational lensing signals of optically identified clusters are impacted by a selection bias -- halo triaxiality and large-scale structure along the line of sight simultaneously boost the lensing signal and richness (the inferred number of galaxies associated with a cluster). As a result, a cluster sample selected by richness has a mean lensing signal higher than expected from its mean mass, and the inferred mass will be biased high. This selection bias is currently limiting the accurac…

a feature that i wish was built into mastodon from the start & hope it eventually comes to heads.social. feel like being able to communicate only with people on your local server is one of the missing pieces in actually making local servers work. (i'd certainly be more apt to live-toot live shows/streams if i knew the readers were specifically the heads server.)