搜索结果: 1-15 共查到“高能天体物理学 stars”相关记录23条 . 查询时间(0.221 秒)
Rotating Stars and Revolving Planets: Bayesian Exploration of the Pulsating Sky
Time series Poisson point processes Harmonic analysis Periodograms Experimental design Astronomy Pulsars Extrasolar planets
2011/10/20
I describe ongoing work on development of Bayesian methods for exploring periodically varying phenomena in astronomy, addressing two classes of sources: pulsars, and extrasolar planets (exoplanets). F...
Hybrid stars with the Dyson-Schwinger quark model
Hybrid stars Dyson-Schwinger quark model
2011/10/18
We study the hadron-quark phase transition in the interior of neutron stars. For the hadronic sector we use a microscopic equation of state involving nucleons and hyperons derived within the Brueckner...
Tkachenko modes in rotating neutron stars: the effect of compressibility and implications for pulsar timing noise
Tkachenko modes rotating neutron stars compressibility pulsar timing noise
2010/11/11
Long wavelength oscillations (Tkachenko waves) of the triangular lattice of quantized vortices in super uid neutron stars have been suggested as one of the possible explanations for the timing noise o...
Main-sequence massive stars possess convective cores that likely harbor strong dy-namo action. To assess the role of core convection in building magnetic fields within these stars, we employ the 3-D a...
The revival of an explosion mechanism of massive stars - the quark hadron phase transition during the early post bounce phase of core collapse supernovae
Core collapse supernovae protoneutron stars general relativity radiation hydrodynamics
2010/11/16
We explore explosions of massive stars, which are triggered via the quark hadron phase transition during the early post bounce phase of core collapse supernovae. The onset of quark matter is favored u...
Images of unclassified and supergiant B[e] stars disks with interferometry
techniques high angular resolution – techniques interferometric – binaries close– stars
2010/11/16
B[e] stars are among the most peculiar objects in the sky. This spectral type, characterised
by allowed and forbidden emission lines, and a large infrared excess, does not represent an
homogenous cl...
A survey of diffuse interstellar bands in the Andromeda galaxy: optical spectroscopy of M31 OB stars
dust extinction – galaxies individual (M31) – galaxies ISM – ISM H ii regions – ISM
2010/11/10
We present the largest sample to-date of intermediate-resolution blue-to-red optical spectra of B-type supergiants in M31 and undertake the first survey of diffuse interstellar bands (DIBs) in this ga...
Magnetic fields of Ap stars as a result of an instability
Stars chemically peculiar magnetic fields – instabilities
2010/11/15
Ap star magnetism is often attributed to fossil magnetic fields which have not changed much since the pre-main-sequence epoch of the stars. Stable magnetic field configurations are known which could p...
Young Stellar Groups and Their Most Massive Stars
Young Stellar Groups Their Most Massive Stars
2010/11/11
We analyze the masses and spatial distributions of fourteen young stellar groups in Taurus, Lupus3, ChaI, and IC348. These nearby groups, which typically contain 20 to 40 members, have membership cata...
Radio emission from the massive stars in Westerlund 1
Radio emission massive stars in Westerlund 1
2010/11/10
The diverse massive stellar population in the young massive clusterWesterlund 1 (Wd 1)provides an ideal laboratory to observe and constrain mass-loss processes throughout the transitional phase of mas...
The fractal spatial distribution of stars in open clusters and stellar associations
ISM structure open clusters and associations general stars formation
2010/11/11
The Interstellar Medium has a fractal structure, in the sense that gas and dust distribute in a hierarchical and self-similar manner. Stars in new-born cluster probably follow the same fractal pattern...
Abundance Patterns in S-type AGB stars : Setting Constraints on Nucleosynthesis and Stellar Evolution Models
Abundance Patterns Setting Constraints Stellar Evolution Models
2010/11/12
During the evolution on the AGB, S-type stars are the first objects to experience s-process nucleosynthesis and third dredge-ups, and therefore to exhibit sprocess signatures in their atmospheres.
Identification of a Population of X-ray Emitting Massive Stars in the Galactic Plane
stars: winds outflows – stars Wolf-Rayet – supergiants – X-rays binaries – X-rays
2010/11/16
We present X-ray, infrared, optical and radio observations of four previously unidentified Galactic plane Xray sources, AX J163252–4746, AX J184738–0156, AX J144701–5919 and AX J144547–5931. Detection...
Modelling chromospheric line profiles as diagnostics of velocity fields in ω Centauri red giant stars
line profiles globular clusters individual atmospheres mass loss
2010/11/11
Context. Mass loss of ∼ 0.1-0.3 M⊙ from Population II red giant stars (RGB) is a requirement of stellar evolution theory in order to account for several observational evidences in globular clust...
Magnetars as Highly Magnetized Quark Stars: an analytical treatment
High Energy Astrophysical Phenomena (astro-ph.HE)
2011/1/6
We present an analytical model of a magnetar as a high density magnetized quark bag. The effect of strong magnetic fields (B > 5 x 10^{16} G) in the equation of state is considered. An analytic expres...