An Age Difference of 2 Gyr between a Metal-Rich and a Metal …
2013年7月31日 · Here we present an age determination of the metal-rich globular cluster 47 Tucanae by fitting the properties of the cluster white dwarf population, which implies an absolute age of 9.9 (0.7) Gyr at 95% confidence. This is about 2.0 Gyr younger than inferred for the metal-poor cluster NGC 6397 from the same models, and provides quantitative ...
Age of the Universe - University of California, Los Angeles
2012年12月27日 · They estimate an age of the Universe which is at least 2 Gyr older than the disk, so t o > 11.5 Gyr. Hansen et al. have used the HST to measure the ages of white dwarfs in the globular cluster M4, obtaining 12.7 +/- 0.7 Gyr.
请问天文学上1Gyr=_____年？ - 百度知道
2012年8月7日 · 首先GYR不是太阳到地球的距离，这个距离（1.5亿公里）天文学中称为一个天文单位，英文全称Astronomical Unit，简称AU，不是GYR，GYR我没听说过，字面上看是不是 gyratory 的打头3个字母？
[1705.01634] Galaxy Protoclusters as Drivers of Cosmic Star …
2017年5月3日 · View a PDF of the paper titled Galaxy Protoclusters as Drivers of Cosmic Star-Formation History in the First 2 Gyr, by Yi-Kuan Chiang and 3 other authors
An Age Difference of 2 Gyr between a Metal-Rich and a Metal …
2013年7月31日 · Here we present an age determination of the metal-rich globular cluster 47 Tucanae by fitting the properties of the cluster white dwarf population, which implies an absolute age of 9.9 (0.7) Gyr...
2GYR: Crystal structure of human artemin - RCSB PDB
2006年5月9日 · Here we report the 1.92 A crystal structure of the complex formed between ARTN and its receptor GFRalpha3, which is the initiating step in the formation of a ternary signaling complex containing the shared RET receptor.
2-Gyr Simulation of the Oort-Cloud Formation. I ... - Springer
2009年3月14日 · In this contribution, we introduce a simulation of the evolution of an initial proto-planetary disc (PPD) for 2 Gyr period, in which 10,038 studied test particles (TPs), representing the disc, are perturbed by four giant planets in their …
请问天体物理学中的单位Gyr与yr是什么意思？ - 百度知道
Gry是年龄单位，Gry=109年。
(PDF) 2-Gyr Simulation of the Oort-Cloud Formation. I
2009年9月1日 · In this contribution, we introduce a simulation of the evolution of an initial proto-planetary disc (PPD) for 2Gyr period, in which 10,038 studied test particles (TPs), representing the disc, are...
2gyr - Proteopedia, life in 3D
2gyr is a 6 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. [ARTN_HUMAN] Ligand for the GFR-alpha-3-RET receptor complex but can also activate the GFR-alpha-1-RET receptor complex.