Tootfinder

Photodesorption efficiency of OH radical on the ice surface in the wavelength range from ultraviolet to visible
Ni-En Sie, Masashi Tsuge, Yoichi Nakai, Naoki Watanabe
https://arxiv.org/abs/2406.02984

Photodesorption efficiency of OH radical on the ice surface in the wavelength range from ultraviolet to visible
The photodesorption efficiencies of the hydroxyl (OH) radical from the water ice surface were measured in the range of 310-700 nm for the first time. Although isolated H$_2$O molecules and OH radicals do not absorb visible photons, the photodesorption of OH interacting with the ice surface was found to occur by a one-photon process in the entire visible range. The photodesorption efficiency strongly depended on the wavelength, and the analyses of photodesorption cross sections indicated that on…

Bundles of metric structures as left ultrafunctors
Ali Hamad
https://arxiv.org/abs/2406.11076 https://arxiv.org/pdf/2406.11076
arXiv:2406.11076v1 Announce Type: new
Abstract: We pursue the study of Ultracategories initiated by Makkai and more recently Lurie by looking at properties of Ultracategories of complete metric structures, i.e. coming from continuous model theory, instead of ultracategories of models of first order theories. Our main result is that for any continuous theory $\mathbb{T}$, there is an equivalence between the category of left ultrafunctors from a compact Hausdorff space $X$ to the category of $\mathbb{T}$-models and a notion of bundle of $\mathbb{T}$-models over $X$. The notion of bundle of $\mathbb{T}$-models is new but recovers many classical notions like Bundle of Banach spaces, or (semi)-continuous field of $\mathrm{C}^*$-algebras or Hilbert spaces.

Apple unveils visionOS 2, with a higher-res, ultra-wide Mac Virtual Display option later in 2024, regular photos gaining spatial depth, new gestures, and more (Benjamin Mayo/9to5Mac)
https://9to5mac.com/2024/06/10/apple-a

Apple announces visionOS 2: simpler navigation, upgraded Mac Virtual Display, more - 9to5Mac
As part of its WWDC announcements, Apple unveiled visionOS 2, the first major software update for the Apple Vision Pro...

Phase-resolving the absorption signatures of water and carbon monoxide in the atmosphere of the ultra-hot Jupiter WASP-121b with GEMINI-S/IGRINS
Joost P. Wardenier, Vivien Parmentier, Michael R. Line, Megan Weiner Mansfield, Xianyu Tan, Shang-Min Tsai, Jacob L. Bean, Jayne L. Birkby, Matteo Brogi, Jean-Michel D\'esert, Siddharth Gandhi, Elspeth K. H. Lee, Colette I. Levens, Lorenzo Pino, Peter C. B. Smith

Phase-resolving the absorption signatures of water and carbon monoxide in the atmosphere of the ultra-hot Jupiter WASP-121b with GEMINI-S/IGRINS
Ultra-hot Jupiters are among the best targets for atmospheric characterization at high spectral resolution. Resolving their transmission spectra as a function of orbital phase offers a unique window into the 3D nature of these objects. In this work, we present three transits of the ultra-hot Jupiter WASP-121b observed with Gemini-S/IGRINS. For the first time, we measure the phase-dependent absorption signals of CO and H$_{\text{2}}$O in the atmosphere of an exoplanet, and we find that they are …

Astronomical Spectroscopy with Skipper CCDs: First Results from a Skipper CCD Focal Plane Prototype at SIFS
Edgar Marrufo Villalpando, Alex Drlica-Wagner, Brandon Roach, Marco Bonati, Abhishek Bakshi, Julia Campa, Gustavo Cancelo, Braulio Cancino, Claudio R. Chavez, Fernando Chierchie, Juan Estrada, Guillermo Fernandez Moroni, Luciano Fraga, Manuel E. Gaido, Stephen E. Holland, Rachel Hur, Michelle Jonas, Peter Moore, Eduardo Paolini, Andr\'es A. Plazas Malag\'on, Leandro Stefa…

Astronomical Spectroscopy with Skipper CCDs: First Results from a Skipper CCD Focal Plane Prototype at SIFS
We present the first on-sky results from an ultra-low-readout-noise Skipper CCD focal plane prototype for the SOAR Integral Field Spectrograph (SIFS). The Skipper CCD focal plane consists of four 6k x 1k, 15 $μ$m pixel, fully-depleted, p-channel devices that have been thinned to ~250 $μ$m, backside processed, and treated with an anti-reflective coating. These Skipper CCDs were configured for astronomical spectroscopy, i.e., single-sample readout noise < 4.3 e- rms/pixel, the ability to achiev…

Vi um documentšrio sobre Foucault do "Brasil Paralelo" e hš tanta besteira, num nível tão idiota, que não consegui ver até o final.
Denunciei, mesmo sabendo que é em geral meio inútil.
Esse tipo de documentšrio é difamação com filosofia freestyle e instituto Tireidoku, feitos com um único propósito, a agenda da "guerra cultural" da ultradireita.

This https://arxiv.org/abs/2206.06170 has been replaced.
link: https://scholar.google.com/scholar?q=a

Two-cardinal ideal operators and indescribability
A well-known version of Rowbottom's theorem for supercompactness ultrafilters leads naturally to notions of two-cardinal Ramseyness and corresponding normal ideals introduced herein. Generalizing results of Baumgartner [7, 8], Feng [22] and the first author [16, 17], we study the hierarchies associated with a particular version of two-cardinal Ramseyness and a strong version of two-cardinal ineffability, as well as the relationships between these hierarchies and a natural notion of transfinite …

This https://arxiv.org/abs/2401.10550 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Large recurrence of the polynomial Van der Waerden's theorem and its application in Ramsey theory
Recently M. Di Nasso and M. Ragosta proved an exponential version of Hindman's finite sum theorem: for every finite partition of $\mathbb{N}$, there exists a monochromatic infinite exponential pattern of a single sequence. They used the stronger version of Furstenberg's Central Sets Theorem and the theory of ultrafilters to prove their results. In this article, we prove these patterns are abundant by considering two-fold extensions of the Di Nasso-Ragosta theorem. We prove that each term of thi…

Phase-resolving the absorption signatures of water and carbon monoxide in the atmosphere of the ultra-hot Jupiter WASP-121b with GEMINI-S/IGRINS
Joost P. Wardenier, Vivien Parmentier, Michael R. Line, Megan Weiner Mansfield, Xianyu Tan, Shang-Min Tsai, Jacob L. Bean, Jayne L. Birkby, Matteo Brogi, Jean-Michel D\'esert, Siddharth Gandhi, Elspeth K. H. Lee, Colette I. Levens, Lorenzo Pino, Peter C. B. Smith

Phase-resolving the absorption signatures of water and carbon monoxide in the atmosphere of the ultra-hot Jupiter WASP-121b with GEMINI-S/IGRINS
Ultra-hot Jupiters are among the best targets for atmospheric characterization at high spectral resolution. Resolving their transmission spectra as a function of orbital phase offers a unique window into the 3D nature of these objects. In this work, we present three transits of the ultra-hot Jupiter WASP-121b observed with Gemini-S/IGRINS. For the first time, we measure the phase-dependent absorption signals of CO and H$_{\text{2}}$O in the atmosphere of an exoplanet, and we find that they are …

This https://arxiv.org/abs/2311.09853 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Low-redshift absorption in the Seyfert galaxy PG 1211+143 -- a distant inflow maintaining off-plane accretion or the gravitational redshift of matter orbiting the SMBH?
The detection of a high velocity (~ 0.3c) inflow of highly ionized matter during an extended XMM-Newton observation of the luminous Seyfert galaxy PG 1211+143 in 2014 provided the first direct evidence of a short-lived accretion event, and an explanation for the powerful winds (UFOs) now recognised as a common property of many luminous Seyfert galaxies. Although the ultra-fast inflow - observed at a redshift of 0.483 - was detected in only one of seven spacecraft orbits, weaker (lower column) b…