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New findings reveal the most detailed mass map of dark matter（图）
Astronomy Physics Research
2023/6/29
For millennia, humans have been fascinated by the mysteries of the cosmos. From ancient civilizations such as the Babylonians, Greeks, and Egyptians to modern-day astronomers, the allure of the starry...
The Search for High-Mass X-ray Binaries in the Phoenix Dwarf Galaxy
High-Mass X-ray Binaries Phoenix Dwarf Galaxy
2012/2/23
We report on the first X-ray images of the Phoenix dwarf galaxy, taken with \emph{XMM-Newton} in July 2009. This local group dwarf galaxy shares similarities with the Small Magellanic Cloud (SMC) incl...
The XMM Cluster Survey: The Stellar Mass Assembly of Fossil Galaxies
The XMM Cluster Survey Stellar Mass Fossil Galaxies Cosmology and Extragalactic Astrophysics
2012/2/21
This paper presents both the result of a search for fossil systems within the XMM Cluster Survey and the Sloan Digital Sky Survey and the results of a study of the stellar mass assembly and stellar po...
RXTE Observations of the Low-Mass X-Ray Binary 4U 1608-522 in Upper-Banana State
RXTE Observations Low-Mass X-Ray Binary 4U 1608-522 Upper-Banana State
2011/10/11
To investigate the physics of mass accretion onto weakly-magnetized neutron stars, 95 archival RXTE datasets of an atoll source 4U 1608-522, acquired over 1996-2004 in so-called upper-banana state, we...
Radio Interferometric Planet Search II: Constraints on sub-Jupiter-Mass Companions to GJ 896A
Interferometric Planet Constraints sub-Jupit
2011/10/10
We present results from the Radio Interferometric Planet (RIPL) search for compan- ions to the nearby star GJ 896A. We present 11 observations over 4.9 years. Fitting astrometric parameters to the dat...
A Two-Tiered Correlation of Dark Matter with Missing Transverse Energy: Reconstructing the Lightest Supersymmetric Particle Mass at the LHC
Correlation Dark Matter Missing Transverse Energy Reconstructing Lightest Supersymmetric
2011/10/18
We suggest that non-trivial correlations between the dark matter particle mass and collider based probes of missing transverse energy H_T^miss may facilitate a two tiered approach to the initial disco...
Dissecting high-mass star-forming regions; tracing back their complex formation history
Dissecting high-mass star-forming regions complex formation history
2011/8/24
We present near-infrared JHKs imaging as well as K-band multi-object spectroscopy of the massive stellar content of W3 Main using LUCI at the LBT. We confirm 13 OB stars by their absorption line spect...
Galaxy And Mass Assembly (GAMA): the red fraction and radial distribution of satellite galaxies
surveys – galaxies star formation – galaxies interaction – galaxies
2011/8/24
We investigate the properties of satellite galaxies that surround isolated hosts within the redshift range 0.01 < z < 0.15, using data taken as part of the Galaxy And Mass Assembly survey. Making use ...
Subaru weak-lensing study of A2163: bimodal mass structure
Subaru weak-lensing study A2163 bimodal mass structure
2011/8/24
We present a weak-lensing analysis of the merging cluster A2163 using Subaru/Suprime-Cam and CHFT/Mega-Cam data and discuss the dynamics of this cluster merger, based on complementary weak-lensing, X-...
A Realistic Assessment of the Sensitivity of XENON10 and XENON100 to Light-Mass WIMPs
the Sensitivity of XENON10 XENON100 Light-Mass WIMPs
2011/9/9
The underlaying assumptions and uncertainties involved in the derivation of WIMP exclusion limits from XENON10 and XENON100 detectors are examined. In view of these, recent claims of sensitivity to li...
Giant Planet Formation by Disk Instability in Low Mass Disks?
Giant Planet Formation Disk Instability Low Mass Disks
2011/1/11
Forming giant planets by disk instability requires a gaseous disk that is massive enough to become gravitationally unstable and able to cool fast enough for self-gravitating clumps to form and survive...
Reconciling a significant hierarchical assembly of massive early-type galaxies at z<~1 with mass downsizing
massive early-type galaxies Cosmology and Extragalactic Astrophysics
2011/1/11
Hierarchical models predict that massive early-type galaxies (mETGs) are the latest systems to be in place into the cosmic scenario (at z<~0.5), conflicting with the observational phenomenon of galaxy...
Shapiro delay measurement of a two solar mass neutron star
Shapiro delay measurement solar mass neutron star
2011/1/11
Neutron stars are composed of the densest form of matter known to exist in our universe, and thus provide a unique laboratory for exploring the properties of cold matter at super-nuclear density. Meas...
The impact of realistic models of mass segregation on the event rate of extreme-mass ratio inspirals and cusp re-growth
realistic models mass segregation the event rate
2011/1/11
One of the most interesting sources of gravitational waves (GWs) for LISA is the inspiral of compact objects on to a massive black hole (MBH), commonly referred to as an "extreme-mass ratio inspiral" ...
Multiwavelength Observations of Accretion in Low-Mass X-ray Binary Systems
Multiwavelength Observations Accretion Low-Mass X-ray Binary Systems
2011/1/11
This work is intended to provide an introduction to multiwavelength observations of low-mass X-ray binaries and the techniques used to analyze and interpret their data. The focus will primarily be on ...