ECHA J0843.3–7905: Discovery of an ‘old’ classical T Tauri star in the η Chamaeleontis clusterdoi:10.1046/j.1365-8711.2002.05093.xstars: activitycircumstellar matterstars: pre-main-sequencestars: rotationopen clusters and associations: individual: ηChamaeleontis...
This discovery provides the first direct observational evidence that the Galactic nuclear stellar bulge contains ancient stars (>10 Gyr old). Based on this we conclude that merging globular clusters likely contributed to building-up the high stellar density in the nuclear stellar bulge of the Milky...
In recent years, however, astronomers have noticed some ancient planets do not follow that process as they orbit too far away from their host stars to, in the words of Tuthill and Norris, have "run the business of planet building". Adding to the mystery, astronomers could not tell how suc...
WASHINGTON, Jan, 4 (Xinhua) -- The latest discovery of an "astonishing" overabundance of massive stars in an adjacent galaxy has shed further light on the formation and evolution of the universe, a group of international astronomers said while revealing their findings. The scientists observed some...
with smaller helium-burning cores than their single-star counterparts. Theoretical models show that these small cores imply the stars had much larger masses when ascending the red giant branch. The second class consists of 32 red giants with masses down to 0.5 M⊙, whose implied ages would...
which is why companies such as Alnylam and Axon Enterprise, and emerging incumbents such as MarketAxess remain as significant positions in the portfolio. These aren’t staid old companies that have been around for decades, but companies now becoming dominant franchises in areas of enduring ...
The vast majority of stars with mass similar to that of the Sun are expected to destroy lithium (Li) gradually over the course of their lives, via low-temperature nuclear burning. This has now been supported by observations of hundreds of thousands of re
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Read on to learn more about the new movie that brings Krakow and Lissing together again, some details of the cast members and the teaser trailer for Santa Tell Me.Wcth stars Erin Krakow & Daniel Lissing in Santa Tell Me on Hallmark Channel Daniel Lissing and Erin Krakow in Santa Tell Me...
Discovery of a candidate old, isolated neutron star in the field of a galactic cirrus cloudNeutron sourcesInterstellar cloudsNeutron stars... JT Stocke,QD Wang,ES Perlman,... - 《Astronomical Journal》 被引量: 61发表: 1995年 XMM-Newton discovery of 7 s pulsations in the isolated neutron sta...