A5008494740- Dark Matter and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Cosmology and Gravitation Theories
- Scientific Research and Discoveries
- Stellar, planetary, and galactic studies
- E-Learning and Knowledge Management
- Astronomy and Astrophysical Research
- Experimental Learning in Engineering
- Radio Astronomy Observations and Technology
- Advanced Data Processing Techniques
- Advanced Thermodynamics and Statistical Mechanics
Donostia International Physics Center
2024
University of the Basque Country
2003-2024
Recent discoveries of large halos stars and dark matter around some the lowest mass galaxies defy expectations that dwarf should be small dense. Here we find are a general feature well known dwarfs orbiting Milky Way also for isolated in Local Group. Furthermore, these seen to surround dense core within each dwarf, with clear density transition visible between halo at radius $\ensuremath{\simeq}1.0\text{ }\text{ }\mathrm{kpc}$. This common core-halo structure is hard understand standard...
Low-mass galaxies in the local group are dominated by dark matter and comprise well-studied ``dwarf spheroidal'' (dSph) class, with typical masses of ${10}^{9}--{10}^{10}{M}_{\ensuremath{\bigodot}}$ also equally numerous ``ultrafaint dwarfs'' (UFDs), discovered recently, that distinctly smaller denser only ${10}^{7}--{10}^{8}{M}_{\ensuremath{\bigodot}}$. This bimodality amongst low-mass contrasts scale-free continuity expected for formed under gravity, as standard cold model heavy particles....
ABSTRACT Dark matter (DM) as a Bose–Einstein condensate, such the axionic scalar field particles of String Theory, can explain coldness DM on large scales. Pioneering simulations in this context predict rich wave-like structure, with ground state soliton core every galaxy surrounded by halo excited states that interfere de Broglie scale. This scale is largest for low-mass galaxies momentum lower, providing simple explanation wide cores dwarf spheroidal galaxies. Here we extend these ‘wave...
Dark matter-dominated cores have long been claimed for the well-studied local group dwarf galaxies. More recently, extended stellar halos uncovered around several of these dwarfs through deeper imaging and spectroscopy. Such core-halo structures are not a feature conventional cold dark matter (CDM), based on collisionless particles where smooth, scale-free profiles predicted. In contrast, smooth prominent predicted Warm Fuzzy/Wave Matter (WDM/$\psi$DM) respectively. The question arises to...
The presence of large dark matter cores in dwarf galaxies has long been puzzling and many are now known to be surrounded by an extensive halo stars. Distinctive core-halo structure is characteristic as a Bose Einstein condensate, $\psi$DM, with dense, soliton core predicted every galaxy, representing the ground state, large, tenuous excited density waves. A marked transition between set de Broglie wavelength, prominent standing wave that denser over order magnitude than surrounding halo....
The unusually large "dwarf" galaxy Crater II, with its small velocity dispersion, $\simeq 3$ km/s, defies expectations that low mass galaxies should be and dense. We combine the latest stellar dispersion profiles finding II has a prominent dark core of radius 0.71^{+0.09}_{-0.08}$ kpc, surrounded by density halo, transition visible between halo. show this profile matches distinctive core-halo predicted "Wave Dark Matter" as Bose-Einstein condensate, $\psi$DM, where ground state soliton is...
We compare the abundant prolate shaped galaxies reported beyond z$>$3 in deep JWST surveys, with predicted {\it stellar} appearance of young detailed hydro-simulations three main dark matter contenders: Cold (CDM), Wave/Fuzzy ($\psi$DM) and Warm Dark Matter (WDM). find observed galaxy images closely resemble elongated stellar for both $\psi$DM WDM, during first $\simeq$ 500Myr while material steadily accretes from long, smooth filaments. The mater halos WDM also have pronounced, elongation...
<title>Abstract</title> Low mass galaxies in the Local Group are dominated by dark matter and comprise well studied “dwarf Spheroidal" (dSph) class, with typical masses of 10<sup>9−10</sup><italic>M</italic><sub>⊙</sub> also equally numerous “ultra faint dwarfs" (UFD), discovered recently, that distinctly smaller denser only 10<sup>7−8</sup><italic>M</italic><sub>⊙</sub>. This bimodality amongst low contrasts scale free continuity expected for formed under gravity, as standard Cold Dark...
The authors discuss the foundations, nature, and characteristics of a methodology that has been applied from nonPiagetian viewpoint to redefine curriculum development formalization proposal. ways in which artificial intelligence interact is discussed. model described connected directly with university environments, experience School Engineering Bilbao briefly reported.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>