Zobrazeno 1 - 10
of 117 419
pro vyhledávání: '"Astrophysics - Astrophysics of Galaxies"'
Warm dark matter has been strongly constrained in recent years as the sole component of dark matter. However, a less-explored alternative is that dark matter consists of a mixture of warm and cold dark matter (MWDM). In this work, we use observations
Externí odkaz:
http://arxiv.org/abs/2409.18917
While many astrophysical plasmas can be modelled successfully assuming ionisation and thermal equilibrium, in some cases this is not appropriate and a non-equilibrium approach is required. In nebulae around evolved stars the local elemental abundance
Externí odkaz:
http://arxiv.org/abs/2409.18904
Autor:
Cai, Bao-Jun, Li, Bao-An
The strong-field gravity in General Relativity (GR) realized in neutron stars (NSs) renders the Equation of State (EOS) $P(\varepsilon)$ of supradense neutron star (NS) matter to be essentially nonlinear and refines the upper bound for $\phi\equiv P/
Externí odkaz:
http://arxiv.org/abs/2409.18854
Autor:
Šiljeg, Barbara, Adams, Elizabeth A. K., Fraternali, Filippo, Hess, Kelley M., Oosterloo, Tom A., Marasco, Antonino, Adebahr, Björn, Dénes, Helga, Lucero, Danielle M., Piña, Pavel E. Mancera, Moss, Vanessa A., Ponomareva, Anastasia A., van der Hulst, J. M.
Context. Understanding the dwarf galaxy population in low density environments is crucial for testing the LCDM cosmological model. The increase in diversity towards low mass galaxies is seen as an increase in the scatter of scaling relations such as
Externí odkaz:
http://arxiv.org/abs/2409.18825
Forthcoming cosmological imaging surveys, such as the Rubin Observatory LSST, require large-scale simulations encompassing realistic galaxy populations for a variety of scientific applications. Of particular concern is the phenomenon of intrinsic ali
Externí odkaz:
http://arxiv.org/abs/2409.18761
Autor:
Dekel, Avishai, Stone, Nicholas C., Chowdhury, Dhruba Dutta, Gilbaum, Shmuel, Li, Zhaozhou, Mandelker, Nir, Bosch, Frank C. van den
The scenario of feedback-free starbursts (FFB), which predicts excessively bright galaxies at cosmic dawn as observed using JWST, may provide a natural setting for black hole (BH) growth. This involves the formation of intermediate-mass seed BHs and
Externí odkaz:
http://arxiv.org/abs/2409.18605
Autor:
De, Ayanabha, Narang, Mayank, Puravankara, Manoj, Baskaran, Shridharan, Tyagi, Himanshu, Banerjee, Bihan, Nayak, Prasanta Kumar, Surya, Arun
In this work, we have carried out a systematic analysis of the VLASS quick look catalogs together with \textit{Gaia DR3} to identify the optical counterparts of 3~GHz radio emitters within 500~pc to obtain a homogeneous statistical sample of stellar
Externí odkaz:
http://arxiv.org/abs/2409.18466
Gaia Data Release 3 (DR3) has provided the largest and most astrometrically precise catalogue of nearby stars to date, allowing for a more complete membership census of nearby, young stellar moving groups. These loose associations of young (age $<$10
Externí odkaz:
http://arxiv.org/abs/2409.17521
(abridged) Accretion onto supermassive black holes (SMBHs) at close to the Eddington rate can influence the host galaxy via powerful winds. Theoretical models of such winds can explain observational correlations between SMBHs and their host galaxies
Externí odkaz:
http://arxiv.org/abs/2409.18271
Autor:
Cooke, Ryan J., Welsh, Louise
We report a new, reliable determination of the CN excitation temperature of diffuse molecular clouds in the Milky Way, based on ultra high spectral resolution observations. Our determination is based on CN $B^{2}\Sigma^{+}-X^{2}\Sigma^{+}$ (0,0) vibr
Externí odkaz:
http://arxiv.org/abs/2409.18270