Zobrazeno 1 - 10
of 2 032
pro vyhledávání: '"Almeida Jorge"'
We give a ranker-based description using finite-index congruences for the variety $\boldsymbol{\mathrm{DAb}}$ of finite monoids whose regular $\mathcal{D}$-classes form Abelian groups. This combinatorial description yields a normal form for general p
Externí odkaz:
http://arxiv.org/abs/2411.08523
Unraveling the nature of dark matter (DM) stands as a primary objective in modern physics. Here we present evidence suggesting deviations from the collisionless Cold DM (CDM) paradigm. It arises from the radial distribution of stars in six Ultra Fain
Externí odkaz:
http://arxiv.org/abs/2407.16755
Publikováno v:
A&A 690, A151 (2024)
*** Context: The halos of low-mass galaxies may allow us to constrain the nature of dark matter (DM), but the kinematic measurements to diagnose the required properties are technically extremely challenging. However, the photometry of these systems i
Externí odkaz:
http://arxiv.org/abs/2407.16519
Autor:
Almeida, Jorge Sanchez
It was known that an ideal spherically symmetric stellar system with isotropic velocities and an inner core cannot reside in a Navarro, Frenk, and White (NFW) gravitational potential. The incompatibility can be pinned down to the radial gradient of t
Externí odkaz:
http://arxiv.org/abs/2406.13613
A long linear structure recently discovered could be the stellar wake produced by the passage of a runaway supermassive black hole (SMBH) or, alternatively, a bulgeless edge-on galaxy. We report on new very deep HST imaging that seems to be in tensio
Externí odkaz:
http://arxiv.org/abs/2406.00102
Autor:
Sánchez-Menguiano, Laura, Sánchez, Sebastián F., Almeida, Jorge Sánchez, Muñoz-Tuñón, Casiana
Context. One of the most fundamental scaling relations in galaxies is observed between metallicity and stellar mass -- the mass-metallicity relation (MZR) -- although recently a stronger dependence of the gas-phase metallicity with the galactic gravi
Externí odkaz:
http://arxiv.org/abs/2402.01222
Autor:
Sánchez-Menguiano, Laura, Almeida, Jorge Sánchez, Sánchez, Sebastián F., Muñoz-Tuñón, Casiana
Interpreting the scaling relations followed by galaxies is a fundamental tool for assessing how well we understand galaxy formation and evolution. Several scaling relations involving the galaxy metallicity have been discovered through the years, the
Externí odkaz:
http://arxiv.org/abs/2312.02046