搜索结果: 1-15 共查到“天文学 Peculiar”相关记录17条 . 查询时间(0.109 秒)
The peculiar properties of horizontal branch stars in omega Centauri
peculiar properties horizontal branch stars omega Centauri
2011/10/20
We measured temperatures, gravities, and masses for a large sample of blue horizontal branch stars in omega Centauri, comparing the results with theoretical expectations for canonical and He-enriched ...
Peculiar motions, accelerated expansion and the cosmological axis
Peculiar motions accelerated expansion cosmological
2011/10/12
Peculiar velocities change the expansion rate of any observer moving relative to the smooth Hubble flow. As a result, observers in a galaxy like our Milky Way can experience accelerated expansion with...
Stars at the Tip of Peculiar Elephant Trunk-Like Clouds in IC 1848E: A Possible Third Mechanism of Triggered Star Formation
ISM: HII regions — ISM: individual (IC 1848E) — ISM: kinematics and dynamics — stars: formation — stars: pre-main-sequence
2011/10/10
The HII region IC 1848 harbors a lot of intricate elephant trunk-like structures that look morphologically different from usual bright-rimmed clouds (BRCs). Of particular interest is a concentration o...
The Peculiar Chemical Inventory of NGC 2419 -- An Extreme Outer Halo "Globular Cluster"
Peculiar Chemical Inventory Extreme Outer
2011/10/8
NGC 2419 is a massive outer halo Galactic globular cluster whose stars have previously been shown to have somewhat peculiar abundance patterns. We have observed seven luminous giants that are members ...
Discovery of two L & T binaries with wide separations and peculiar photometric properties
Discovery binaries separations peculiar photometric properties
2011/9/28
We present spatially resolved photometric and spectroscopic observations of two wide brown dwarf binaries uncovered by the SIMP near-infrared proper motion survey. The first pair (SIMP J1619275+031350...
How peculiar was the recent extended minimum - A hint towards double minima
extended minimum - A hint double minima
2011/9/26
In this paper, we address the controversy regarding the recent extended solar minimum as seen in helioseismic low- and intermediate-degree mode frequencies: studies from different instruments identify...
How peculiar was the recent extended minimum - A hint towards double minima
methods data analysis — Sun helioseismology — Sun
2011/8/24
In this paper, we address the controversy regarding the recent extended solar minimum as seen in helioseismic low- and intermediate-degree mode frequencies: studies from different instruments identify...
An extremely peculiar hot subdwarf with a ten-thousand-fold excess of zirconium, yttrium, and strontium
hot subdwarf ten-thousand-fold
2011/1/10
Helium-rich subdwarf B (He-sdB) stars represent a small group of low-mass hot stars with luminosities greater than those of conventional subdwarf B stars, and effective temperatures lower than those o...
Warm dark matter at small scales: peculiar velocities and phase space density
Warm dark matter small scales peculiar velocities phase space density
2010/11/12
We study the scale and redshift dependence of the power spectra for density perturbations and
peculiar velocities, and the evolution of a coarse grained phase space density for (WDM) particles that d...
Complementarity of Weak Lensing and Peculiar Velocity Measurements in Testing General Relativity
Complementarity of Weak Lensing Peculiar Velocity Measurements General Relativity
2010/11/12
We explore the complementarity of weak lensing and galaxy peculiar velocity measurements to
better constrain modifications to General Relativity. We find no evidence for deviations from GR on cosmolo...
Radio-continuum jets around the peculiar galaxy pair ESO 295-IG022
Galaxies clusters individual Abell S0102 – Galaxies individual
2010/11/10
We report new radio-continuum observations with the Australia Telescope Compact Array (ATCA) of the region surrounding the peculiar galaxy pair ESO295-IG022, at the centre of the poor cluster Abell S0...
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...
Toward an Empirical Theory of Pulsar Emission. IX. On the Peculiar Properties and Geometric Regularity of Lyne & Manchester's
miscellaneous methods MHD plasmas data analysis pulsars general
2010/11/10
Lyne & Manchester (1988) identified a group of some 50 pulsars they called “partial cones”
which they found difficult to classify and interpret. They were notable for their asymmetric
average profil...
A Slight Excess of Large Scale Power from Moments of the Peculiar Velocity Field
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/29
The peculiar motions of galaxies can be used to infer the distribution of matter in the Universe. It has recently been shown that measurements of the peculiar velocity field indicates an anomalously h...
Peculiar abundances in cv secondary stars：revising their Evolutionary history?
Peculiar abundances cv secondary stars
2009/6/17
Peculiar abundances in cv secondary stars：revising their Evolutionary history?