Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012newa...17..537x&link_type=abstract
New Astronomy, Volume 17, Issue 5, p. 537-541.
Astronomy and Astrophysics
Astronomy
Scientific paper
We present high-resolution spectroscopic observations for a sample of 21 young, solar-type stars near the Sun recently discovered in the X-ray wavelength range during the ROSAT all-sky survey. Based on these observations, we derive the lithium (Li) abundances of these 21 sample stars. Using the lithium abundances and the X-ray luminosity, we investigated the relationship between the Li abundances and the X-ray activity. We found a clear correlation between the lithium abundances and the X-ray luminosity: as the X-ray luminosity became stronger, the lithium abundance decreases in our sample stars. Our sample results provide further evidence that a correlation appears to exist between Li abundances, X-ray activity and age for a large number of solar-type stars. The results also confirm the presence of very active young stars close to the Sun, in agreement with recent findings from UV and X-ray surveys.
Xing Li-Feng
Zhang Xiao-Dong
Zhao Shuang-Yi
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