搜索结果: 91-105 共查到“天文学 Galaxy”相关记录376条 . 查询时间(0.158 秒)
The dynamics of satellite and dark matter halo interactions on galaxy formation and evolution
Satellite Dark matter halos. Dynamic Galaxy formation. The evolution of
2014/12/9
In my thesis, I research four consequences of satellite and dark matter halo interaction on galaxy formation. ^ First, I investigate detailed physical processes in interaction between satellites and d...
Galactic Bulge Feedback and its Impact on Galaxy Evolution
galactic feedback hydrodynamics intergalactic medium Intestellar Medium supernova remnants X-ray
2014/12/9
Galactic bulges of early-type spirals and elliptical galaxies comprise primarily old stars, which account for more than half of the total stellar mass in the local Universe. These stars collectively g...
Galaxy evolution at high-redshift: Millimeter-wavelength surveys with the AzTEC camera
Pure sciences Dust Galaxy evolution Galaxies Star formation Submillimeter
2014/12/9
Galaxies detected by their thermal dust emission at submillimeter (submm) and millimeter (mm) wavelengths comprise a population of massive, intensely star-forming systems in the early Universe. These ...
The Role Of Stellar Feedback In Galaxy Evolution
Pure sciences Galaxies X-ray Stellar feedback Galaxy evolution
2014/12/9
Aiming at understanding the role of stellar feedback in galaxy evolution, I present a study of the hot interstellar medium in several representative galaxies, based primarily on X-ray observations as ...
The AzTEC Millimeter-wave Camera: Design, Integration, Performance, and the Characterization of the (sub-)millimeter Galaxy Population
Detectors Galaxies Instrumentation Starbursts Far-infrared background
2014/12/9
One of the primary drivers in the development of large format millimeter detector arrays is the study of sub-millimeter galaxies (SMGs) - a population of very luminous high-redshift dust-obscured star...
A Bayesian approach to the semi-analytic model of galaxy formation
Pure sciences Galaxy population Diverse data sources Galaxy evolution Galaxy formation
2014/12/9
It is believed that a wide range of physical processes conspire to shape the observed galaxy population but it remains unsure of their detailed interactions. The semi-analytic model (SAM) of galaxy fo...
High-resolution Ultraviolet Spectroscopy of Gas in Galaxy Halos and Large-scale Structures
galaxy intergalactic medium
2014/12/9
This dissertation presents spectroscopic studies of gas in galaxy halos and large-scale structures through high-resolution quasar absorption lines. The broad goal of this effort is to learn how galaxi...
Bayesian Anatomy of Galaxy Structure
Bayesian Statistics Galaxy Markov chain Monte Carlo Morphology
2014/12/9
In this thesis I develop Bayesian approach to model galaxy surface brightness and apply it to a bulge-disc decomposition analysis of galaxies in near-infrared band, from Two Micron All Sky Survey (2MA...
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...
Peering deep into time with one of the world’s newest, most sophisticated telescopes, astronomers have found a galaxy – AzTEC-3 – that gives birth annually to 500 times the number of suns as the Milky...
Astronomers solve puzzle about bizarre object at the center of our galaxy（图）
bizarre object Astronomers
2014/12/2
for years, astronomers have been puzzled by a bizarre object in the center of the Milky Way that was believed to be a hydrogen gas cloud headed toward our galaxy’s enormous black hole.
Astronomers solve puzzle about bizarre object at the center of our galaxy
astronomy The Milky Way
2014/11/10
for years, astronomers have been puzzled by a bizarre object in the center of the Milky Way that was believed to be a hydrogen gas cloud headed toward our galaxy’s enormous black hole.
Newly detected short radio pulse appears to come from far beyond our galaxy（图）
Radio telescopes Pulse A quick radio burst Signal Radio The pulsar. The observatory The Milky Way
2014/7/18
The discovery of a split-second burst of radio waves using the Arecibo radio telescope in Puerto Rico provides important new evidence of mysterious pulses that appear to come from deep in outer space.
Failed dwarf galaxy survives galactic collision thanks to full dark-matter jacket
Failed dwarf galaxy survives galactic collision thanks full dark-matter jacket
2014/6/19
Like a bullet wrapped in a full metal jacket, a high-velocity hydrogen cloud hurtling toward the Milky Way appears to be encased in a shell of dark matter, according to a new analysis of data from the...
Pasadena, CA— New work from a team of scientists including Carnegie’s Josh Simon analyzed the chemical elements in the faintest known galaxy, called Segue 1, and determined that it is effectively a fo...