Results 31 to 40 of about 1,661,126 (377)
In recent years, a growing interest on the equilibrium of compact astrophysical objects like white dwarf and neutron stars has been manifested. In particular, various modifications due to Planck scale energy effects have been considered. In this paper we analyze the modification induced by Gravity's Rainbow on the equilibrium configurations described ...
Garattini, Remo, Mandanici, Gianluca
openaire +4 more sources
Reprocessing the Hipparcos data for evolved giant stars II. Absolute magnitudes for the R-type carbon stars [PDF]
The Hipparcos Intermediate Astrometric Data for carbon stars have been reprocessed using an algorithm which provides an objective criterion for rejecting anomalous data points and constrains the parallax to be positive.
A. Jorissen+52 more
core +2 more sources
Using Gravitational-wave Observations and Quasi-universal Relations to Constrain the Maximum Mass of Neutron Stars [PDF]
Combining the GW observations of merging systems of binary neutron stars and quasi-universal relations, we set constraints on the maximum mass that can be attained by nonrotating stellar models of neutron stars.
L. Rezzolla, E. Most, L. R. Weih
semanticscholar +1 more source
Chemistry of the Most Metal-poor Stars in the Bulge and the z > 10 Universe [PDF]
Metal-poor stars in the Milky Way are local relics of the epoch of the first stars and the first galaxies. However, a low metallicity does not prove that a star formed in this ancient era, as metal-poor stars form over a range of redshift in different ...
Casey, Andrew R., Schlaufman, Kevin C.
core +2 more sources
Star Product and Star Exponential [PDF]
Here we extend the star products by means of complex symmetric matrices. In this way we obtain a family of star products. Next we consider the star exponentials with respect to these star products, and finally we obtain several interesting identities.
Tomihisa, Toshio, Yoshioka, Akira
openaire +4 more sources
AbstractWe explore the possibility that (Bose-Einstein) condensation of scalar fields from string compactifications can lead to long-lived compact objects. Depending on the type of scalar fields we find different realisations of star-like and solitonic objects.
Krippendorf, Sven+2 more
openaire +5 more sources
Carbon-enhanced metal-poor stars: a window on AGB nucleosynthesis and binary evolution. II. Statistical analysis of a sample of 67 CEMP-$s$ stars [PDF]
Many observed CEMP stars are found in binary systems and show enhanced abundances of $s$-elements. The origin of the chemical abundances of these CEMP-$s$ stars is believed to be accretion in the past of enriched material from a primary star in the AGB ...
Abate, C.+3 more
core +2 more sources
Unsupervised discovery of human activities from long‐time videos
In this study, the authors propose a complete framework based on a hierarchical activity model to understand and recognise activities of daily living in unstructured scenes.
Salma Elloumi+4 more
doaj +1 more source
Multiplicity among solar-type stars [PDF]
Context. The statistical properties of binary stars are clues for understanding their formation process. A radial velocity survey was carried on amongst nearby G-type stars and the results were published in 1991. Aims.
J. Halbwachs+3 more
semanticscholar +1 more source
The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems [PDF]
The distribution of stellar masses that form in one star formation event in a given volume of space is called the initial mass function (IMF). The IMF has been estimated from low-mass brown dwarfs to very massive stars.
P. Kroupa
semanticscholar +1 more source