Search Publications
Solar-stellar astrophysics and dark matter
Turck-Chièze, Sylvaine; Lopes, Ilídio
In this review, we recall how stars contribute to the search for dark matter and the specific role of the Sun. We describe a more complete picture of the solar interior that emerges from neutrino detections, gravity and acoustic mode measurements of the Solar and Heliospheric Observatory (SOHO) satellite, becoming a reference for the most common s…
The LEGUE high latitude bright survey design for the LAMOST pilot survey
Xu, Yan; Lépine, Sébastien; Deng, Li-Cai +14 more
We describe the footprint and input catalog for bright nights in the LAMOST Pilot Survey, which began in October 2011. Targets are selected from two stripes in the north and south Galactic Cap regions, centered at δ = 29°, with 10° width in declination, covering right ascensions of 135° to 290° and -30° to 30° respectively. We selected spectroscop…
X-ray spectroscopy of clusters of galaxies
Ota, Naomi
Clusters of galaxies are the most massive objects in the Universe and precise knowledge of their mass structure is important to understand the history of structure formation and constrain still unknown types of dark contents of the Universe. X-ray spectroscopy of galaxy clusters provides rich information about the physical state of hot intracluste…
Application of a data-driven simulation method to the reconstruction of the coronal magnetic field
He, Han; Fan, Yu-Liang; Wang, Hua-Ning +1 more
Ever since the magnetohydrodynamic (MHD) method for extrapolation of the solar coronal magnetic field was first developed to study the dynamic evolution of twisted magnetic flux tubes, it has proven to be efficient in the reconstruction of the solar coronal magnetic field. A recent example is the so-called data-driven simulation method (DDSM), whi…
Interaction and eruption of two filaments observed by Hinode, SOHO, and STEREO
Li, Ying; Ding, Ming-De
We investigate the interaction between two filaments and the subsequent filament eruption event observed from different viewing angles by Hinode, the Solar and Heliospheric Observatory, and the Solar Terrestrial Relations Observatory. In the event, the two filaments rose high, interacted with each other, and finally were ejected along two differen…
Micro-arcsecond Celestial Reference Frames: definition and realization — Impact of the recent IAU Resolutions
Capitaine, Nicole
The adoption of the International Celestial Reference System (ICRS), based on Very Long Baseline Interferometry (VLBI) observations of extragalactic radiosources by the International Astronomical Union (IAU) since 1998 January 1, opened a new era for astronomy. The ICRS and the corresponding frame, the International Celestial Reference Frame (ICRF…
Interpretation of the coronal magnetic field configuration of the Sun
Li, Xing; Li, Bo; Yu, Hui
The origin of the heliospheric magnetic flux on the Sun, and hence the origin of the solar wind, is a topic of hot debate. While the prevailing view is that the solar wind originates from outside the coronal streamer helmets, there also exists the suggestion that the open magnetic field spans a far wider region. Without the definitive measurement …
Studies of a possible new Herbig Ae/Be star in the open cluster NGC 7380
Mathew, Blesson; Banerjee, D. P. K.; Subramaniam, Annapurni +3 more
We present a study of the star 2MASS J22472238+5801214 with the aim of identifying its true nature which has hitherto been uncertain. This object, which is a member of the young cluster NGC 7380, has been variously proposed to be a Be star, a D-type symbiotic and a Herbig Ae/Be star in separate studies. Here we present optical spectroscopy, near-I…
Properties of the high-mass star forming region IRAS 22475+5939
Wang, Jun-Jie; Liu, Xiao-Lan
IRAS 22475+5939 has been well studied by previous astronomers, but we can still discover new characteristics about it, using the first observations of the lines from CO J=2-1, 13CO J=2-1 and 13CO J=3-2 by the KOSMA 3m telescope. The mapping of the intensity ratio of 13CO J=3-2 and 13CO J=2-1 shows that t…