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Multiple suns and young planets:NSF-supported graduate researchers lead exoplanet discoveries
Multiple suns young planets NSF-supported graduate researchers exoplanet
2016/7/15
Graduate students supported by the National Science Foundation (NSF) helped helm two separate exoplanet discoveries that could expand researchers' understanding of how planets form and orbit stars.Kev...
Interactive evolution of multiple water-ice reservoirs on Mars: Insights from hydrogen isotope compositions
Mars water ice isotope atmospheric escape
2017/4/10
Remote sensing data from orbiter missions have proposed that ground ice may currently exist on Mars, although the
volume is still uncertain. Recent analyses of Martian meteorites have suggested that ...
Astronomers Catch Multiple-Star System in First Stages of Formation（图）
Astronomers Multiple-Star System First Stages of Formation
2015/3/4
For the first time, astronomers have caught a multiple-star system in the beginning stages of its formation, and their direct observations of this process give strong support to one of several suggest...
Evidence for Multiple Pathways to Deuterium Enhancements in Protoplanetary Disks
Evidence Multiple Pathways Deuterium Enhancements Protoplanetary Disks
2012/2/23
The distributions of deuterated molecules in protoplanetary disks are expected to depend on the molecular formation pathways. We use observations of spatially resolved DCN emission from the disk aroun...
The Kinematics of Multiple-Peaked Ly-alpha Emission in Star-Forming Galaxies at z~2-3
Kinematics Multiple-Peaked Ly-alpha Emission Star-Forming Galaxies
2011/10/13
We present new results on the Ly-alpha emission-line kinematics of 18 z~2-3 star-forming galaxies with multiple-peaked Ly-alpha profiles. With our large spectroscopic database of UV-selected star-form...
A multiple-beam CLEAN for imaging intra-day variable radio sources
Methods: data analysis – Techniques: image processing – Radio continuum: general
2011/10/13
The CLEAN algorithm, widely used in radio interferometry for the deconvolution of radio images, performs well only if the raw radio image (dirty image) is, to good approximation, a simple convolution ...
CLASH: New Multiple-Images Constraining the Inner Mass Profile of MACS J1206.2-0847
CLASH: Constraining Inner Mass Profile MACS J1206.2-0847
2011/10/9
We present a strong-lensing analysis of the galaxy cluster MACS J1206.2-0847 ($z$=0.44) using UV, Optical, and IR, HST/ACS/WFC3 data taken as part of the CLASH multi-cycle treasury program, with VLT/V...
Multiple stellar populations in the Globular Clusters NGC1851 and NGC6656 (M22)
Stars: abundances – Stars: atmospheres – Stars: Population II – Galaxy: glob- ular clusters
2011/9/30
In the last years, photometric and spectroscopic evidence has demonstrated that many, maybe all the Globular Clusters (GC) host multiple stellar populations. High-resolution spectroscopy has establish...
Formation of galactic nuclei with multiple supermassive black holes at high redshifts
black hole physics – galaxies:nuclei – galaxies:evolution – galaxies:high redshift – galaxies:kinematics dynamics
2011/9/27
We examine the formation of groups of multiple supermassive black holes (SMBHs) in gas-poor galactic nuclei due to the high merger rate of galaxies at high redshifts. We calculate the relative likelih...
Mining SDSS in search of Multiple Populations in Globular Clusters
Mining SDSS Multiple Populations Globular Clusters
2011/1/10
Several recent studies have reported the detection of an anomalous color spread along the red giant branch (RGB) of some globular clusters (GC) that appears only when color indices including a near ul...
A Population of Very-Hot Super-Earths in Multiple-Planet Systems Should be Uncovered by Kepler
Earth and Planetary Astrophysics (astro-ph.EP) Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/7
We simulate a Kepler-like observation of a theoretical exoplanet population and we show that the observed orbital period distribution of the Kepler giant planet candidates is best matched by an averag...
Spectral imaging of the Sagittarius B2 region in multiple 7-mm molecular lines
Galaxy Astrophysics (astro-ph.GA)
2010/12/29
We have undertaken a spectral-line imaging survey of a 6 x 6 arcmin^2 area around Sgr B2 near the centre of the Galaxy, in the range from 30 to 50 GHz, using the Mopra telescope. The spatial resolutio...
CCD MEASUREMENTS OF DOUBLE AND MULTIPLE STARS AT NAO ROZHEN. IV
binaries visual the Bulgarian National Astronomical Observatory
2010/10/29
Using the 2 m telescope of the Bulgarian National Astronomical Observatory at Rozhen observations of 30 double or multiple stars were carried out during two half nights on July 20 and 21, 2009. This i...
Multiple Weak Deflections in Galaxy-Galaxy Lensing
dark matter galaxies halos gravitational lensing
2010/3/9
The frequency and effects of multiple weak deflections in galaxy-galaxy lensing are investigated via Monte Carlo simulations. The lenses in the simulations are galaxies with known redshifts and known ...
An All-Sky Extrasolar Planet Survey with Multiple Object, Dispersed Fixed-delay Interferometers
Planet Survey Multiple Object Fixed-delay Interferometers
2009/7/1
An All-Sky Extrasolar Planet Survey with Multiple Object, Dispersed Fixed-delay Interferometers。