Tootfinder

Halogen abundance evidence for the formation and metasomatism of the primary lunar crust: #moon –> new clues about formation.

Influencias astron\'omicas sobre la evoluci\'on geol\'ogica y biol\'ogica de la tierra (Parte II)
Carlos Alberto Olano
https://arxiv.org/abs/2507.15070

Influencias astronómicas sobre la evolución geológica y biológica de la tierra (Parte II)
With the same general purposes as Part I of this monograph, we analyze here major events in the history of the Earth, such as the formation of the Earth itself, the origin of life, the great glaciations and the mass extinctions of species, and we also analyze the astronomical context in which they occurred. We argue that the Sun was captured around 500-700 Myr ago by a supercloud, of which the Orion arm and Gould's belt are currently part, and that this event marked the history of the Earth. Wi…

The mass of TOI-654 b: A short-period sub-Neptune transiting a mid-M dwarf
Kai Ikuta, Norio Narita, Takuya Takarada, Teruyuki Hirano, Akihiko Fukui, Hiroyuki Tako Ishikawa, Yasunori Hori, Tadahiro Kimura, Takanori Kodama, Masahiro Ikoma, Jerome P. de Leon, Kiyoe Kawauchi, Masayuki Kuzuhara, Gaia Lacedelli, John H. Livingston, Mayuko Mori, Felipe Murgas, Enric Palle, Hannu Parviainen, Noriharu Watanabe, Izuru Fukuda, Hiroki Harakawa, Yuya Hayashi, Klaus Hodapp, Keisuke Isogai, Taiki Kag…

The mass of TOI-654 b: A short-period sub-Neptune transiting a mid-M dwarf
Sub-Neptunes are small planets between the size of the Earth and Neptune. The orbital and bulk properties of transiting sub-Neptunes can provide clues for their formation and evolution of small planets. In this paper, we report on follow-up observations of a planetary system around the mid-M dwarf TOI-654, whose transiting sub-Neptune TOI-654 b ($P=1.53$ day) is validated as a suitable target for the atmospheric observation. We measure the planetary mass and stellar properties with the InfraRed…

Reactions of abiogenic hydrocarbons in Earth's upper mantle
Nore Stolte, Tao Li, Ding Pan
https://arxiv.org/abs/2506.13350 https://

Reactions of abiogenic hydrocarbons in Earth's upper mantle
The formation of hydrocarbon fuels in Earth's interior has traditionally been considered to have biogenic origins; however, growing evidence suggests that some light hydrocarbons may instead originate abiotically. It is widely expected that the Fisher-Tropsch-type (FTT) process, which typically refers to the conversion of inorganic carbon to organic matter in the geologic convention, may also happen in Earth's interior, but the aqueous conditions and absence of industrial catalysts in deep envi…

Super-Earth formation in systems with cold giants
Claudia Danti, Michiel Lambrechts, Sebastian Lorek
https://arxiv.org/abs/2506.17091 https://

Super-Earth formation in systems with cold giants
Around our Sun, terrestrial planets did not grow beyond Earth in mass, while super-Earths are found to orbit approximately every other solar-like star. It remains unclear what divides these super-Earth systems from those that form terrestrial planets, and what role wide-orbit gas giants play in this process. Here, we show that the key uncertainty is the degree of viscous heating in the inner disc, which regulates the pebble accretion efficiency. In this parameter study, we assume pebble sizes l…

Bistability in radiatively heated melt ponds
Rui Yang, Christopher J. Howland, Hao-Ran Liu, Roberto Verzicco, Detlef Lohse
https://arxiv.org/abs/2506.14093

Bistability in radiatively heated melt ponds
Melting and solidification processes, intertwined with convective flows, play a fundamental role in geophysical contexts. One of these processes is the formation of melt ponds on glaciers, ice shelves, and sea ice. It is driven by solar radiation and is of great significance for the Earth's heat balance, as it significantly lowers the albedo. Through direct numerical simulations and theoretical analysis, we unveil a bistability phenomenon in the melt pond dynamics. As solar radiation intensity …

Analysis of the evolution of terrestrial relief through inverse elevation transition
Yulisa Valverde, Milton Valverde, Jhair Tarazona, Giorgio Tarazona, Yehosua Tarazona
https://arxiv.org/abs/2507.03173

Analysis of the evolution of terrestrial relief through inverse elevation transition
Through the examination of the Theory of Seismic Energy and the Theory of Volcanic Energy, we understand that the interaction of internal and external energies in favourable terrain has led to countless transformations over geological time frames. Therefore, this research aims to understand the evolution of the Earth's surface based on the theories proposed by Claudio Valverde Ramirez. This study introduces the concept of inverse elevation transition, which explains the formation of mountains, …

Physical properties of $R$Co$_{2}$Al$_{8}$ ($R=$ La, Ce, Pr, Nd and Sm) single crystals: an emerging structure-type for anisotropic Kondo lattice studies
Fernando A. Garcia, Sushma Kumari, Juan Schmidt, Cris Adriano, Aashish Sapkota, Paul C. Canfield, Rebecca Flint, Raquel A. Ribeiro
https://arxiv.org/abs/2506.10905

Physical properties of $R$Co$_{2}$Al$_{8}$ ($R=$ La, Ce, Pr, Nd and Sm) single crystals: an emerging structure-type for anisotropic Kondo lattice studies
Systematic investigations of rare-earth ($R$) based intermetallic materials is a leading strategy to reveal the underlying mechanisms governing a range of physical phenomena, such as the formation of a Kondo lattice and competing electronic and magnetic anisotropies. In this work, the magnetic, thermal and transport properties of $R$Co$_{2}$Al$_{8}$ ($R=$ La, Ce, Pr, Nd and Sm) single crystals are presented. LaCo$_{2}$Al$_{8}$ is characterized as a Pauli paramagnet and transport measurements, w…

Confinement-induced resonances for the creation of quasi-1D ultra cold gases of alkali--alkaline-earth dimers
Lorenzo Oghittu, Premjith Thekkeppatt, Nirav P. Mehta, Seth T. Rittenhouse, Klaasjan van Druten, Florian Schreck, Arghavan Safavi-Naini
https://arxiv.org/abs/2506.02579

Confinement-induced resonances for the creation of quasi-1D ultra cold gases of alkali--alkaline-earth dimers
We theoretically investigate the role of confinement-induced resonances (CIRs) in low-dimensional ultracold atomic mixtures for the formation of weakly bound dimers. To this end, we examine the scattering properties of a binary atomic mixture confined by a quasi-one-dimensional (quasi-1D) potential. In this regime, the interspecies two-body interaction is modeled as an effective 1D zero-range pseudopotential, with a coupling strength $g_\mathrm{1D}$ derived as a function of the three-dimensiona…

Enhancement of hydrogen absorption and hypervalent metal hydride formation in lanthanum using cryogenic ball milling
Sakun Duwal, Vitalie Stavila, Catalin Spataru, Mohana Shivanna, Portia Allen, Timothy Elmslie, Christopher T. Seagle, Jason Jeffries, Nenad Velisavljevic, Jesse Smith, Paul Chow, Yuming Xiao, Maddury Somayazulu, Peter A. Sharma
https:/…

Enhancement of hydrogen absorption and hypervalent metal hydride formation in lanthanum using cryogenic ball milling
Rare earth superhydrides exhibit high temperature superconductivity but are difficult to characterize and use in applications due to their high formation and stability pressures, which are typically in excess of 100 GPa. We studied how modification of the rare earth precursor improves hydrogen reactivity and hydrogen uptake for forming such metal hydrides at lower pressures. An elemental lanthanum precursor was milled at liquid nitrogen temperatures for different time intervals. After exposure …

Self-organization of earth's inner magnetospheric multi-ion plasma
Usman Shazad, M. Iqbal
https://arxiv.org/abs/2507.00734 https://

Self-organization of earth's inner magnetospheric multi-ion plasma
The self-organization of a magnetized multi-ion plasma, composed of inertialess electrons and inertial H+, He+, and O+ ions, leads to the formation of quadruple Beltrami (QB) field structures. The QB self-organized state is a linear combination of four single Beltrami fields, and it is a non-force-free state that shows strong magnetofluid coupling. Moreover, the QB state is characterized by four relaxed state structures of different length scales. The investigation reveals that the generalized …

Extended Spherical Geometry Algorithm for Spaceborne SAR Processing in Stripmap and TOPS Imaging Modes
Xinhua Mao, Manyi Tao, Jixia Fan
https://arxiv.org/abs/2506.08620

Extended Spherical Geometry Algorithm for Spaceborne SAR Processing in Stripmap and TOPS Imaging Modes
The Spherical Geometry Algorithm (SGA) demonstrates superior capability in achieving efficient and precise spaceborne SAR image formation processing, even under challenging imaging conditions including non-linear radar trajectories and spherical Earth surface geometry. Nevertheless, the original SGA is specifically developed for spotlight SAR data processing and can't directly applied to processing spaceborne SAR data in other modes. In this paper, we first analyze the limitations of the SGA al…

Was Earth's water acquired locally during the earliest phases of the Solar System formation?
Lise Boitard-Cr\'epeau, Cecilia Ceccarelli, Pierre Beck, Lionel Vacher, Piero Ugliengo
https://arxiv.org/abs/2507.03968

Was Earth's water acquired locally during the earliest phases of the Solar System formation?
The origin of the terrestrial water remains debated, as standard Solar System formation models suggest that Earth formed from dry grains, inside the snowline of the Proto-Solar Nebula (PSN). Here, we revisit this issue through the lens of computational chemistry. While the classically used snowline relies on a single condensation temperature, recent work in quantum chemistry shows that the binding energy of water on icy grains has a gaussian distribution, which implies a gradual sublimation of …

On the Efficacy of Ocean Formation with a Primordial Hydrogen Atmosphere
Darius Modirrousta-Galian, Jun Korenaga
https://arxiv.org/abs/2506.10417 https://

On the Efficacy of Ocean Formation with a Primordial Hydrogen Atmosphere
It has been suggested that Earth's present water budget formed from oxidation reactions between its initial hydrogen-rich primordial atmosphere and its magma ocean. Here we examine this hypothesis by building a comprehensive atmosphere-magma ocean model. We find that water formation is unlikely for two reasons. First, any water formed from oxidation reactions in the magma ocean would quickly outgass because of the water-poor atmosphere above. Second, the top boundary layer of the magma ocean be…

Dynamical origin of Theia, the last giant impactor on Earth
Duarte Branco, Sean N. Raymond, Pedro Machado
https://arxiv.org/abs/2507.01826 https://

Dynamical origin of Theia, the last giant impactor on Earth
Cosmochemical studies have proposed that Earth accreted roughly 5-10% of its mass from carbonaceous (CC) material, with a large fraction delivered late via its final impactor, Theia (the Moon-forming impactor). Here, we evaluate this idea using dynamical simulations of terrestrial planet formation, starting from a standard setup with a population of planetary embryos and planetesimals laid out in a ring centered between Venus and Earth's orbits, and also including a population of CC planetesima…

Evaluating an Embryo Origin for Detached TNOs within Full Kuiper Belt Formation Models
Nathan A. Kaib, Chadwick A. Trujillo, Scott S. Sheppard
https://arxiv.org/abs/2507.03741

Evaluating an Embryo Origin for Detached TNOs within Full Kuiper Belt Formation Models
With perihelia well beyond Neptune, but semimajor axes and eccentricities indicative of substantial perturbation, the origins of detached trans-Neptunian objects (TNOs) remain a dynamical puzzle. In particular, detached TNOs with orbital inclinations below ~25 degrees are not easily generated from any known mechanism currently in the modern solar system. One notable hypothesis for the origins of detached TNOs is that a ~Mars- to Earth-mass planetary embryo detached the perihelia of these object…

The James Webb Space Telescope NIRSpec-PRISM Transmission Spectrum of the Super-Puff, Kepler-51d
Jessica E. Libby-Roberts, Aaron Bello-Arufe, Zachory K. Berta-Thompson, Caleb I. Ca\~nas, Yayaati Chachan, Renyu Hu, Yui Kawashima, Catriona Murray, Kazumasa Ohno, Armen Tokadjian, Suvrath Mahadevan, Kento Masuda, Leslie Hebb, Caroline Morley, Guangwei Fu, Peter Gao, Kevin B. Stevenson

The James Webb Space Telescope NIRSpec-PRISM Transmission Spectrum of the Super-Puff, Kepler-51d
Kepler-51 is a 500 Myr G dwarf hosting three "super-puffs" and one low-mass non-transiting planet. Kepler-51d, the coolest (T_eq ~ 350 K) transiting planet in this system, is also one of the lowest density super-puffs known to date (rho_p = 0.038 +/- 0.009 g/cm^3). With a planetary mass of Mp = 5.6 +/- 1.2 Earth masses and a radius of Rp = 9.32 +/- 0.18 Earth radii, the observed properties of this planet are not readily explained by most planet formation theories. Hypotheses explaining Kepler-5…

Very-wide-orbit planets from dynamical instabilities during the stellar birth cluster phase
Andr\'e Izidoro, Sean N. Raymond, Nathan A. Kaib, Alessandro Morbidelli, Andrea Isella
https://arxiv.org/abs/2505.24093

Very-wide-orbit planets from dynamical instabilities during the stellar birth cluster phase
Gas giant planets have been detected on eccentric orbits several hundreds of astronomical units in size around other stars. It has been proposed that even the Sun hosts a wide-orbit planet of 5-10 Earth masses, often called Planet Nine, which influences the dynamics of distant Trans-Neptunian objects. However, the formation mechanism of such planets remains uncertain. Here we use numerical simulations to show that very wide-orbit planets are a natural byproduct of dynamical instabilities that o…

Interior redox state effects on the stability of secondary atmospheres and observational manifestations: LP 791-18 d as a case study for outgassing rocky exoplanets
Leonardos Gkouvelis, Francisco J. Pozuelos, Thomas Drant, Mohammad Farhat, Meng Tian, Can Ak{\i}n
https://arxiv.org/abs/2506.02188

Interior redox state effects on the stability of secondary atmospheres and observational manifestations: LP 791-18 d as a case study for outgassing rocky exoplanets
Recent advances in space and ground-based facilities now enable atmospheric characterization of a selected sample of rocky exoplanets. These atmospheres offer key insights into planetary formation and evolution, but their interpretation requires models that couple atmospheric processes with both the planetary interior and the surrounding space environment. This work focuses on the Earth-size planet LP791 18d, which is estimated to receive continuous tidal heating due to the orbital configuratio…

Replaced article(s) found for astro-ph.EP. https://arxiv.org/list/astro-ph.EP/new
[1/1]:
- CAMPOS II. The onset of protostellar disk substructures and planet formation
Hsieh, Arce, Maureira, Pineda, Segura-Cox, Mardones, Dunham, Li, Offner

Replaced article(s) found for astro-ph.EP. https://arxiv.org/list/astro-ph.EP/new
[1/1]:
- CAMPOS II. The onset of protostellar disk substructures and planet formation
Hsieh, Arce, Maureira, Pineda, Segura-Cox, Mardones, Dunham, Li, Offner

Replaced article(s) found for astro-ph.EP. https://arxiv.org/list/astro-ph.EP/new
[1/1]:
- On the Efficacy of Ocean Formation with a Primordial Hydrogen Atmosphere
Darius Modirrousta-Galian, Jun Korenaga