Results 41 to 50 of about 1,661,126 (377)

Equations of state for supernovae and compact stars [PDF]

open access: yes, 2016
A review is given of various theoretical approaches for the equation of state (EoS) of dense matter, relevant for the description of core-collapse supernovae, compact stars, and compact star mergers.
M. Oertel   +3 more
semanticscholar   +1 more source

A SURVEY OF STELLAR FAMILIES: MULTIPLICITY OF SOLAR-TYPE STARS [PDF]

open access: yes, 2009
We present the results of a comprehensive assessment of companions to solar-type stars. A sample of 454 stars, including the Sun, was selected from the Hipparcos catalog with π>40 mas, σπ/π < 0.05, 0.5 ⩽ B − V ⩽ 1.0 (∼F6–K3), and constrained by absolute ...
D. Raghavan   +8 more
semanticscholar   +1 more source

Binary Interaction Dominates the Evolution of Massive Stars [PDF]

open access: yesScience, 2012
Star Partners Stars more massive than eight times the mass of the Sun are rare and short-lived, yet they are fundamentally important because they produce all the heavy elements in the universe, such as iron, silicon, and calcium. Sana et al. (p.
H. Sana   +9 more
semanticscholar   +1 more source

NEW VARIABLE STAR IN THE ORION CONSTELLATION

open access: yesOdessa Astronomical Publications, 2017
New variable star with α = 05° 57m22s, δ = +20°15.5' (1950) was discovered with elements JD Max=2436999.28 + 0.2343973 E, range 15.6- 16.2m (pg) and asymmetry M-m=0.26.
I. S. Brjukhanov, V. P. Goranskij
doaj   +1 more source

RXJ1856.5-3754 and RXJ0720.4-3125 are P-Stars

open access: yes, 2004
P-stars are a new class of compact stars made of up and down quarks in $\beta$-equilibrium with electrons in a chromomagnetic condensate. P-stars are able to account for compact stars with $R \lesssim 6 Km$, as well as stars comparable to canonical ...
Cea, Paolo
core   +1 more source

A unifying explanation of complex frequency spectra of gamma Dor, SPB and Be stars: combination frequencies and highly non-sinusoidal light curves [PDF]

open access: yes, 2015
There are many Slowly Pulsating B (SPB) stars and γ Dor stars in the Kepler mission data set. The light curves of these pulsating stars have been classified phenomenologically into stars with symmetric light curves and with asymmetric light curves.
Bedding, T. R.   +4 more
core   +3 more sources

Spontaneous Scalarization of Black Holes and Compact Stars from a Gauss-Bonnet Coupling. [PDF]

open access: yesPhysical Review Letters, 2017
We identify a class of scalar-tensor theories with coupling between the scalar and the Gauss-Bonnet invariant that exhibit spontaneous scalarization for both black holes and compact stars.
Hector O. Silva   +4 more
semanticscholar   +1 more source

Origin of Star-to-Star Abundance Inhomogeneities in Star Clusters [PDF]

open access: yesProceedings of the International Astronomical Union, 2008
AbstractThe mass reinserted by young stars of an emerging massive compact cluster shows a bimodal hydrodynamic behaviour. In the inner part of the cluster, it is thermally unstable, while in its outer parts it forms an out-blowing wind. The chemical homogeneity/inhomogeneity of low/high mass clusters demonstrates the relevance of this solution to the ...
S. Silich   +3 more
openaire   +3 more sources

No detection of large-scale magnetic fields at the surfaces of Am and HgMn stars

open access: yes, 2010
We investigate the magnetic dichotomy between Ap/Bp and other A-type stars by carrying out a deep spectropolarimetric study of Am and HgMn stars. Using the NARVAL spectropolarimeter at the Telescope Bernard Lyot (Observatoire du Pic du Midi, France), we ...
A. Hui-Bon-Hoa   +55 more
core   +2 more sources

THE DETERMINATION OF PERIODS AND THE DEFINITION OF VARIABILITY TYPE OF NEW VARIABLE STAR IRAS 17583+5150

open access: yesOdessa Astronomical Publications, 2017
The measurements of brightness of the star IRAS 17583+5150 discovered using the Odessa observatory negatives are discussed in the article. The proposed types of these stars are IRAS 17583+5150 -- type SRB (SRC).
A. P. Solonovich, I. S. Bryukhanov
doaj   +1 more source

Home - About - Disclaimer - Privacy