搜索结果: 1-9 共查到“星系与宇宙学 abundance”相关记录9条 . 查询时间(0.099 秒)
Sensitive limits on the water abundance in cold low-mass molecular cores
formation submil
2014/12/26
We present Submillimeter Wave Astronomy Satellite observations of water vapor in two cold starless clouds, B68 and core D in ρ Ophiuchi. Sensitive nondetections of the 110-101 transition of o-H2O are ...
Chandra Detection of Fe XVII in Absorption: Iron Abundance in the Hot Gaseous Interstellar Medium
4U 1820–303 abundances
2014/12/24
The iron depletion level and the gas-phase iron abundance in the hot (~106 K) interstellar medium (ISM) are critical to our understanding of its energy balance as well as the thermal sputtering, cooli...
Testing Subhalo Abundance Matching in Cosmological Smoothed Particle Hydrodynamics Simulations
galaxies satellite galaxies
2014/12/22
Subhalo abundance matching (SHAM) is a technique for populating simulated dark matter distributions with galaxies, assuming a monotonic relation between a galaxy's stellar mass or luminosity and the m...
Elemental abundance differences in the 16 Cygni binary system: a signature of gas giant planet formation?
Elemental abundance differences signature planet formation
2011/10/20
The atmospheric parameters of the components of the 16Cygni binary system, in which the secondary has a gas giant planet detected, are measured accurately using high quality observational data. Abunda...
Calibrating nebular diagnostics of t* and abundance。
Iron abundance in galactic H II regions。
Testing the Creation of the Universe：The Primordial Helium Abundance
Universe Primordial Helium
2009/6/9
Testing the Creation of the Universe：The Primordial Helium Abundance。
Primordial helium abundance determinations
Primordial helium nuclear reactions nucleosynthesis
2009/6/8
Primordial helium abundance determinations。
Distances of Galactic Planetary Nebulae Based on a Relationship Between the Central Star Mass and the N/O Abundance
ISM abundances planetary nebulae
2009/6/4
Distances of Galactic Planetary Nebulae Based on a Relationship Between the Central Star Mass and the N/O Abundance。