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New way to weigh a white dwarf:Use the Hubble Space Telescope
white dwarf Hubble Space Telescope
2017/6/8
Astronomers have used, for the first time, a novel method to determine the mass of a nearby dead star. The star is a "white dwarf," the shrunken corpse of a star like our sun after it has burned up it...
Much ado about nothing:Astronomers use empty space to study the universe
Much ado about nothing Astronomers empty space universe
2016/8/11
Researchers who are looking for new ways to probe the nature of gravity and dark energy in the universe have adopted a new strategy: looking at what’s not there.In a paper to appear in upcom...
Quasometry is precision measurement of celestial positions and apparent motion of very distant extragalactic objects, such as quasars, galactic nuclei, and QSOs. We use this term to identify a specifi...
How to use molecular clouds to study the propagation of cosmic rays in the Galaxy
cosmic rays:origin and propagation gamma rays molecular clouds
2010/11/1
Observations of molecular clouds in the gamma ray domain provide us with a tool to study the distribution of cosmic rays in the Galaxy. This is because cosmic rays can penetrate molecular clouds, unde...
Classification of field dwarfs and giants in RAVE and its use in stellar stream detection
Galaxy Astrophysics (astro-ph.GA)
2010/10/18
An efficient separation between dwarfs and giants in surveys of bright stars is important, especially for studies in which distances are estimated through photometric parallax relations.
Chemical abundances in metal-poor giants: limitations imposed by the use of classical 1D stellar atmosphere models
Solar and Stellar Astrophysics (astro-ph.SR)
2010/10/12
In this work we have used 3D hydrodynamical (CO5BOLD) and 1D hydrostatic (LHD) stellar atmosphere models to study the importance of convection and horizontal temperature inhomogeneities in stellar abu...
The Use of KS Band Photometric Excesses to Investigate H2 Emission in Planetary Nebulae
KS Band Photometric Planetary Nebulae H2 Emission
2009/6/30
The Use of KS Band Photometric Excesses to Investigate H2 Emission in Planetary Nebulae。
The Use of Line Excitation Mapping to Investigate Planetary Nebula Morphologies
Line Excitation Mapping Investigate Planetary Nebula Morphologies
2009/6/18
The Use of Line Excitation Mapping to Investigate Planetary Nebula Morphologies。
Scientists Use Earth-based Instruments to Document Mercury’s Molten Core（图）
Mercury planetary physics
2007/5/8
3 May 2007，Scientists using Earth-based instruments have discovered that Mercury’s core is partially molten and moving independently from the planet’s other layers, according to research in the 4 May ...