搜索结果: 1-15 共查到“等离子体天体物理学 stars”相关记录17条 . 查询时间(0.187 秒)
The cluster structure of the inner crust of neutron stars in the Hartree-Fock-Bogoliubov approach
cluster structure inner crust neutron stars approach
2011/10/17
We analyse how the structure of the inner curst is influenced by the pairing correlations. The inner-crust matter, formed by nuclear clusters immersed in a superfluid neutron gas and ultra-relativisti...
Tours stars membership in Pleiades open cluster
Tours stars membership Pleiades open cluster
2010/11/15
In this paper, we study the characteristics and physical properties of the young open cluster Pleiades (NGC 1432; M45; Melotte 22; Seven Sisters) using Near Infra Red, JHK pass bands. Our results have...
Search for Keplerian periods in light variations of T Tauri stars and Herbig Ae stars
Keplerian periods T Tauri stars Herbig Ae stars
2010/11/15
Long-term, uniform series of UBVR observations of T Tauri and Herbig Ae stars obtained
over 20 yr at the Maidanak Observatory as part of the ROTOR program are analyzed. We find
a linear relationship...
The Global Gas and Dust budge of the Large Magellanic Cloud --- Importance of Asymptotic Giant Branch stars
The Global Gas Large Magellanic Cloud
2010/11/11
It is still an unresolved problemhowmuch AGB stars can contribute to the overall gas and dust enrichment processes in the interstellar medium within galaxies.We start tackling this problem, by using o...
Dust at sub-solar metallicity: the case of post-AGB stars in the Large Magellanic Cloud
Dust at sub-solar metallicity Large Magellanic Cloud
2010/11/11
Low- and intermediate-mass stars are one of the important dust sources in the interstellar medium (ISM) of galaxies. The compositions of dust ejected from these stars are likely to affect those in the...
The mass-loss rates and molecular abundances of S-type AGB stars
mass-loss rates molecular abundances of S-type AGB stars
2010/11/12
The S-type stars are believed to have a C/O-ratio close to unity (within a few percent). They are considered to represent an intermediate evolutionary stage as AGB stars evolve from oxygen-rich M-type...
All-Sky spectrally matched UBVRI-ZY and u'g'r'i'z' magnitudes for stars in the Tycho2 catalog
Stars Data Analysis and Techniques
2010/11/12
We present fitted UBVRI-ZY and u′g′r′i′z′ magnitudes, spectral types and distances for 2.4M stars, derived from synthetic photometry of a library spectrum that best matches the Tycho2 BTVT , NOMAD RN ...
Chemically Peculiar A/F Stars in Open Clusters of the Milky Way
stars: abundances - stars main sequence - stars rotation - diffusion - Galaxy
2010/11/12
Abundance anomalies have been determined at the surface of many field and open cluster A
and F dwarfs. These abundance anomalies are most likely caused by microscopic diffusion at work within the sta...
On the source of dense outflows from T Tauri Stars. and III. Winds driven from the star-disc shear layer
stars pre-main-sequence stars: winds outflows stars circumstellar matter – stars formation
2010/11/11
Ultraviolet observations of classical T Tauri Stars (cTTSs) have shown that there is a hot (Te ≃ 80, 000 K) and dense (ne ≃ 1010 cm−3) component associated with the large scale jet. ...
AGB Stars in WLM
AGB Stars WLM
2010/11/15
We investigate the star formation history and metallicity of the Local Group irregular dwarf galaxyWLM using wide-field JHK near-infrared imaging, spanning a region of approximately 1 sq. degree, obta...
Abundance anomalies in pre-main-sequence stars: Stellar evolution models with mass loss
Diffusion — stars chemically peculiar — stars mass–loss — stars pre–main-sequence — stars evolution — stars
2010/11/12
Aims. The effects of atomic diffusion on internal and surface abundances of A and F pre–main-sequence stars with mass loss are studied in order to determine at what age the effects materialize, as wel...
Determining the forsterite abundance of the dust around AGB stars
forsterite abundance of the dust AGB stars
2010/11/11
We present a diagnostic tool to determine the forsterite abundance of the dust ejected by AGB stars. Our method is based on a comparison between the observed strength of spectral bands of forsterite a...
Multiplicity of late-type B stars with HgMn peculiarity
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/7
Observations at various wavelengths of late B-type stars exhibiting strong overabundances of the chemical elements Hg and Mn in their atmospheres indicate that these stars are frequently found in bina...
Long-term photometric monitoring of Messier 5 variables: I. Period changes of RR Lyrae stars
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/24
The period changes of 86 M5 RR Lyrae stars have been investigated on a one-hundred-year time base. The published observations have been supplemented by archival Asiago, Konkoly and Las Campanas photog...
The Physical Characteristics of Binary Central Stars of Planetary Nebulae
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/24
A number of efforts are underway to detect close binary stars in planetary nebulae. The primary goal of these studies is to determine the binary fraction of central stars.