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Astronomers Peer Inside Stars,Finding Giant Magnets
Astronomers Peer Inside Stars Giant Magnets
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2015/11/12
Using a technique called asteroseismology, the scientists were able to calculate the magnetic field strengths in the fusion-powered hearts of dozens of red giants, stars that are evolved versions of o...
The outcome of protoplanetary dust growth: pebbles, boulders, or planetesimals? III. Sedimentation driven coagulation inside the snow-line
Methods Numerical Planets satellites formation Protoplanetary disks
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2011/10/20
We investigate dust growth due to settling in a 1D vertical column of a protoplanetary disk. It is known from the observed 10 micron feature in disk SEDs, that small micron-sized grains are present at...
A Compact Early-type Galaxy at z = 0.6 Under a Magnifying Lens: Evidence For Inside-out Growth
galaxies elliptical and lenticular cD
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2010/11/10
We use Keck laser guide star adaptive optics imaging and exploit the magnifying effects of strong gravitational lensing (the effective resolution is FWHM 200 pc) to investigate the sub-kpc scale of ...
The GALEX Arecibo SDSS survey: III. Evidence for the Inside-Out Formation of Galactic Disks
galaxies evolution–ultraviolet galaxies
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2010/11/10
We analyze a sample of galaxies with stellar masses greater than 1010M⊙ and with redshifts in
the range 0.025 < z < 0.05 for which HI mass measurements are available from the GALEX Arecibo SDSS Surve...
Measurement of a Metallicity Gradient in a z=2 Galaxy: Implications for Inside-Out Assembly Histories
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
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2010/12/27
We present near-infrared imaging spectroscopy of the strongly-lensed z=2.00 galaxy SDSS J120601.69+514227.8 (`the Clone arc'). Using OSIRIS on the Keck 2 telescope with laser guide star adaptive optic...
Determining Absorption, Emissivity Reduction, and Local Suppression Coefficients inside Sunspots
Solar and Stellar Astrophysics (astro-ph.SR)
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2010/12/23
The power of solar acoustic waves is reduced inside sunspots mainly due to absorption, emissivity reduction, and local suppression. The coefficients of these power-reduction mechanisms can be determin...
Particle Accelerators inside Spinning Black Holes
Particle Accelerators Spinning Black Holes
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2010/3/18
On the basis of the Kerr metric as a model for a spinning black hole accreting test particles from rest at infinity, I show that the center-of-mass energy for a pair of colliding particles is generica...
Peering inside an artificial sun（图）
an artificial sun heavy hydrogen fuel
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2010/2/24
After more than five decades of research, a major milestone toward the harnessing of fusion power is expected within the next year or two. This milestone, known as “fusion ignition,” should take place...
Quark-Nova Explosion inside a Collapsar：Application to Gamma Ray Bursts
Quark-Nova Explosion Collapsar Gamma Ray Bursts
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2009/9/4
If a quark-nova occurs inside a collapsar, the interaction between the quark-nova ejecta (relativistic iron-rich chunks) and the collapsar envelope leads to features indicative of those observed in Ga...
An Inside-Out View of Bubbles
Bubbles Inside-Out View
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2009/6/15
An Inside-Out View of Bubbles。