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From stardust to pale blue dot:Carbon's interstellar journey to Earth（图）
From stardust pale blue dot Carbon interstellar journey Earth
2021/4/16
We are made of stardust, the saying goes. U.S. National Science Foundation-funded research at the University of Michigan reveals that the statement may be more true than we thought.The ...
HE 1015-2050: Discovery of a Hydrogen-deficient carbon star at high galactic latitude
HE 1015-2050 Hydrogen-deficient carbon star
2011/1/10
Medium resolution spectral analysis of candidate Faint High Latitude Carbon (FHLC) stars from Hamburg/ESO survey has given us the potential to discover objects of rare types. Two primary spectral char...
A Carbon-enhanced Metal-poor Damped Lyman alpha System: Probing Gas from Population III Nucleosynthesis?
galaxies abundances − galaxies evolution − quasars absorption lines quasars: individual J0035− 0918 − stars carbon − stars
2010/11/10
We present high resolution observations of an extremely metal-poor damped Ly system, at zabs = 2.3400972 in the spectrum of the QSO J0035−0918, exhibiting an abundance pattern consistent with mo...
The impact of spatial fluctuations in the ultra-violet background on intergalactic carbon and silicon
methods: numerical intergalactic medium quasars absorption lines
2010/11/12
Spatial inhomogeneities in the spectral shape of the ultra-violet background (UVB) at the tail-end of He II reionisation are thought to be the primary cause of the large fluctuations observed in the H...
A Spitzer/IRS spectral study of a sample of galactic carbon-rich proto-planetary nebulae
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/27
Recent infrared spectroscopic observations have shown that proto-planetary nebulae (PPNs) are sites of active synthesis of organic compounds in the late stages of stellar evolution. This paper present...
Relaxing the Small Particle Approximation for Dust-grain opacities in Carbon-star Wind Models
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
We have computed wind models with time-dependent dust formation and grain-size dependent opacities, where (1) the problem is simplified by assuming a fixed dust-grain size, and where (2) the radiation...
Physicists in Canada and the UK have had a rare glimpse at the atmosphere of a neutron star just 330 years after it was formed in a violent explosion. Instead of resembling more mature neutron stars, ...