搜索结果: 121-135 共查到“STAR”相关记录621条 . 查询时间(0.046 秒)
Measures of Star Formation Rates within Galaxies: the Impact of Diffuse Stellar Populations
galaxies:ISM ISM:structure infrared:galaxies infrared:ISM H{\sc ii} regions
2014/12/9
Thanks to the {\it Spitzer Space Telescope}, the infrared (IR) emission have been better studied in the past decades, as well as its relations to star formation rates (SFR) and the calibrations of IR ...
Dusty Star Formation in Extreme Environments: Galaxies and Galaxy Clusters in the Distant Universe
high-redshift galaxy clusters infrared environment Herschel
2014/12/9
In this thesis, we present a comprehensive study of the dust-obscured star formation (SF) activity in galaxy clusters out to high redshift using infrared (IR) imaging. Using hundreds of galaxy cluster...
Virus fingered as top suspect in West Coast sea star wasting disease（图）
Virus wasting disease
2014/12/1
The following is part twelve in a series on the NSF-NIH-USDA Ecology and Evolution of Infectious Disease (EEID) Program. See parts: one, two, three, four, five, six, seven, eight, nine, 10 and 11.
Mi...
Since 2013, millions of sea stars native to the Pacific coast of North America from Baja California to southern Alaska have succumbed to a mysterious wasting disease in which their limbs pull away fro...
Planet-forming lifeline discovered in a binary star system: ALMA examines ezekiel-like 'wheel in a wheel' of dust and gas（图）
dust gas
2014/12/1
Scientists using the Atacama Large Millimeter/submillimeter Array (ALMA) have detected a streamer of dust and gas flowing from a massive outer disk toward the inner reaches of a binary star system. Th...
Astronomers at the University of Sydney are part of a team that has taken images of the thermonuclear fireball from a 'nova star' for the first time tracking the explosion as it expands.
多数宏观经济变量时间序列有季节波动,如果季节波动是非线性的,采用经季节调整过的数据或传统季节模型等线性处理季节波动的方法可能就不再适用。本文基于季节时变平滑转换自回归(SEATV-STAR)模型,运用"特殊到一般"的非线性检验策略对我国工业增加值季度增长率季节波动进行研究。结果表明:(1)工业增加值的季节波动兼有结构时变和非线性改变,工业增加值的周期波动是线性的。(2)技术进步、体制变迁等因素使得...
COLUMBUS, Ohio: Astronomers have gotten the closest look yet at what happens when a black hole takes a bite out of a star—and the star lives to tell the tale.
Mixing in star-forming clouds explains why sibling stars look alike（图）
sibling star-forming clouds
2014/9/12
The chemical uniformity of stars in the same cluster is the result of turbulent mixing in the clouds of gas where star formation occurs, according to a study by astrophysicists at the University of Ca...
Why sibling stars look alike: Early, fast mixing in star-birth clouds（图）
star-birth clouds sibling stars look alike
2014/9/12
Stars are made mostly of hydrogen and helium, but they also contain trace amounts of other elements, such as carbon, oxygen, iron, and even more exotic substances. By carefully measuring the wavelengt...
Young binary star system may form planets with weird and wild orbits
Young binary star system planets with weird wild orbits
2014/8/14
Unlike our solitary Sun, most stars form in binary pairs -- two stars that orbit a common center of mass. Though remarkably plentiful, binaries pose a number of questions, including how and where plan...
为了探讨玉米赤霉烯酮（Zearalenone，ZEA）抑制睾丸间质细胞分泌雄激素的毒性机理，本研究以体外培养的原代小鼠睾丸间质细胞为材料，分别以0 (对照组)、1、5、10、20 μg•mL-1的ZEA进行染毒，染毒12 h后，利用Western-blot和QRT-PCR技术，检测了细胞内类固醇合成快速调节蛋白（StAR）和类固醇合成关键酶(P450scc、3β-HSD、P450c17...
A University of Utah-led team discovered a “hypervelocity star” that is the closest, second-brightest and among the largest of 20 found so far. Speeding at more than 1 million mph, the star may provid...
‘Upside-down planet’ reveals new method for studying binary star systems
Upside-down planet reveals new method studying binary star systems
2014/5/13
What looked at first like a sort of upside-down planet has instead revealed a new method for studying binary star systems, discovered by a University of Washington student astronomer.
A new study shows what happens during the destruction of a star as it falls into a black hole, contradicting a 2012 report of the disruption of an exotic helium star.