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Stellar lifetime and ultraviolet properties of the old metal-rich Galactic open cluster NGC6791: a pathway to understand the UV upturn of elliptical galaxies
Stellar lifetime ultraviolet properties old metal-rich Galactic cluster NGC6791 UV upturn elliptical galaxies
2012/2/23
The evolutionary properties of the old metal-rich Galactic open cluster NGC6791 are assessed, based on deep UB photometry and 2Mass JK data. For 4739 stars in the cluster, bolometric luminosity and ef...
Using Absorptive Linear Polarization Spectroscopy to Understand Imbedded Stars
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/24
Sensitive measurements of the linearly polarized spectra of stars can be used to deduce geometric properties of their otherwise unresolved circumstellar environments. This paper describes some of the ...
Enigmatic SolarWind Disappearance Events – DoWe Understand Them?
Solar wind disappearance polar field reversals transient coronal holes active regions
2010/9/16
At the Sun–Earth distance of one astronomical unit (1AU),the solar wind is known to be strongly supersonic and super Alfv´enic with Mach and Alfv´en numbers being on average 12 and 9 respe...
Enigmatic SolarWind Disappearance Events–DoWe Understand Them?
Solar wind disappearance polar field reversals transient coronal holes active regions
2009/5/7
At the Sun-Earth distance of one astronomical unit (1AU), the solar wind is known to be strongly supersonic and super Alfv´enic with Mach and Alfv´en numbers being on average 12 and 9 resp...
Lancaster scientist joins NASA mission to understand space storms（图）
space storms aurora borealis
2007/3/15
28/02/2007，A Lancaster scientist is to play a key role in a NASA mission which sees five satellites launched this month from Cape Canaveral in Florida.The satellites will orbit the Earth and help scie...