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Major progress made in construction of Fred Young Submillimeter Telescope（图）
弗雷德·杨 亚毫米望远镜 射电天文学
2023/5/22
An enormous hole 22 meters in diameter has been dug near the summit of Cerro Chajnantor in Chile’s Atacama Desert, at an elevation of 18,400 feet. The hole stands ready for the cement foundation on wh...
Ongoing assembly of massive galaxies by major merging in large groups and clusters from the SDSS
general surveys
2014/12/23
We investigate the incidence of major mergers creating massive (Mstar > 1011 M⊙) galaxies in present-day (z≤ 0.12) groups and clusters. Using a volume-limited sample of 845 groups with dark matter hal...
2MASS wide field extinction maps: IV. The Orion, Mon R2, Rosette, and Canis Major star forming regions
clouds dust extinction structure individual objects Orion molecular complex
2011/10/21
We present a near-infrared extinction map of a large region (approximately 2200 deg^2) covering the Orion, the Monoceros R2, the Rosette, and the Canis Major molecular clouds. We used robust and optim...
A Spectroscopic Study of DD UMa: Ursa Major Group Member and Candidate for BRITE
individual: DD UMa stars: abundances – technique: spectroscopic
2011/10/19
The Ursa Major group is a nearby stellar supercluster which, while not gravitationally bound, is defined by co-moving members. DD UMa is a $\delta$ Scuti star whose membership in the Ursa Major group ...
Is Palomar 1 really associated with the Canis Major overdensity?
Palomar Canis Major overdensity
2010/11/16
t has recently been suggested that the peculiar cluster Pal 1 is associated to the Canis Major dwarf galaxy, which existence is still at the center of a debate. Our rst measurement of the cluster's c...
Evidence of major dry mergers at M* > 2 x 10^11 Msun from curvature in early-type galaxy scaling relations?
galaxies formation
2010/11/11
For early-type galaxies, the correlations between stellar mass and size, velocity dis-
persion, surface brightness, color, axis ratio and color-gradient all indicate that two mass scales, M∗ = ...
The numerous streams in the M31 halo are currently assumed to be due to multiple minor mergers. Here we use the GADGET2 simulation code to test whether M31 could have experienced a major merger in its...
The Evolution of Vector Magnetic Field Associated with Major Flares in NOAA AR10656
Magnetic field evolution flares
2010/9/15
In this paper, we study the evolution of vector magnetic field of AR 10656 by using the observations of Huairou Solar Observing Station (HSOS, China) and Big Bear Solar Observatory (BBSO, USA).The mag...
NASA Research Reveals Major Insight Into Evolution Of Life On Earth
Major Insight Earth Evolution Of Life
2009/8/20
Humans might not be walking on Earth today if not for the ancient fusing of two microscopic, single-celled organisms called prokaryotes, NASA-funded research has found.
RR Lyrae Search and Stellar Populations Study in Canis Major: Preliminary Results
RR Lyrae Search Canis Major Stellar Populations
2009/6/26
RR Lyrae Search and Stellar Populations Study in Canis Major: Preliminary Results。
Star-Forming Galaxies at z - 2：a major science case for the EMIR/GOYA survey on GTC
Star-Forming Galaxies EMIR/GOYA survey
2009/6/18
Star-Forming Galaxies at z - 2：a major science case for the EMIR/GOYA survey on GTC。
The Evolution of Vector Magnetic Field Associated with Major Flares in NOAA AR10656
Magnetic field evolution flares
2009/5/6
In this paper, we study the evolution of vector magnetic
field of AR 10656 by using the observations of Huairou Solar Observing
Station (HSOS, China) and Big Bear Solar Observatory (BBSO, USA).
Th...