Results 41 to 50 of about 320,327 (338)
Compact stars for undergraduates
European Journal of Physics, 2006 We report on an undergraduate student project initiated in the summer semester of 2004 with the aim to establish equations of state for white dwarfs and neutron stars for computing mass-radius relations as well as corresponding maximum masses. First, white dwarfs are described by a Fermi gas model of degenerate electrons and neutrons and effects from ...
Sagert, Irina +3 more
openaire +2 more sources
A Generic Embedding Class-I Model via Karmarkar Condition in fℛ,T Gravity
Advances in Astronomy, 2021 In the present work, we investigate the existence of compact star model in the background of fℛ,T gravity theory, where ℛ represents the Ricci scalar and T refers to the energy-momentum tensor trace.
M. Zubair, Saira Waheed, Hina Javaid
doaj +1 more source
Physical Review Letters, 2015 Recent progress in the determination of both masses and radii of neutron stars is starting to place stringent constraints on the dense matter equation of state. In particular, new theoretical developments together with improved statistical tools seem to favor stellar radii that are significantly smaller than those predicted by models using purely ...
Wei-Chia, Chen, J, Piekarewicz
openaire +3 more sources
The role of dust in "active" and "passive" low-metallicity star formation
, 2004 We investigate the role of dust in star formation activity of extremely metal-poor blue compact dwarf galaxies (BCDs). Observations suggest that star formation in BCDs occurs in two different regimes: "active" and "passive".
Hirashita, H., Hunt, L. K.
core +1 more source
Anisotropic compact objects in f(T) gravity with Finch–Skea geometry
European Physical Journal C: Particles and Fields, 2019 We study relativistic solutions of anisotropic compact stars with Finch–Skea (FS) metric in f(T) gravity framework. The modified FS geometry is considered to obtain the equation of state (EoS) for different known stellar objects with given mass and ...
A. Chanda, S. Dey, B. C. Paul
doaj +1 more source
The Astrophysical Journal, 2023 We use the spectral energy distribution fitting code Prospector to reconstruct the nonparametric star formation history (SFH) of massive ( $\mathrm{log}{M}_{* }\gt 10.3$ ) star-forming galaxies (SFGs) and quiescent galaxies (QGs) at redshift z _obs ∼ 2 ...
Zhiyuan Ji, Mauro Giavalisco
doaj +1 more source
QUARK MATTER IN MASSIVE COMPACT STARS [PDF]
The Astrophysical Journal, 2011 The recent observation of the pulsar PSR J1614-2230 with a mass of 1.97 +/- 0.04 M_sun gives a strong constraint on the quark and nuclear matter equations of state (EoS). We explore the parameter ranges for a parameterized EoS for quark stars. We find that strange stars, made of absolutely stable strange quark matter, comply with the new constraint ...
S. Weissenborn +4 more
openaire +3 more sources
FEBS Letters, EarlyView.This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley +1 more source
Analysis of Charged Compact Stars in Modified Gravity
, 2018 Current study highlights the physical characteristics of charged anisotropic compact stars by exploring some exact solutions of modified field equations in $f(R,G)$ gravity.
Shamir, M. Farasat, Zia, Saeeda
core +1 more source
Possible Local Spiral Counterparts to Compact Blue Galaxies at Intermediate Redshift [PDF]
, 2001 We identify nearby disk galaxies with optical structural parameters similar to those of intermediate-redshift compact blue galaxies. By comparing HI and optical emission-line widths, we show that the optical widths substantially underestimate the true ...
Andredakis Y. C. +3 more
core +3 more sources