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The Nature of Double-Peaked [O III] Active Galactic Nuclei
Nature Double-Peaked [O III] Active Galactic Nuclei
2011/10/11
Active galactic nuclei (AGNs) with double-peaked [O III] lines are suspected to be sub-kpc or kpc-scale binary AGNs. However, pure gas kinematics can produce the same double-peaked line profile in spa...
Any Classical Description of Nature Requires Classical Electromagnetic Zero-Point Radiation
Classical Description Nature Electromagnetic Zero-Point Radiation
2011/8/5
Abstract: Any attempt to describe nature within classical physics requires the presence of Lorentz-invariant classical electromagnetic zero-point radiation so as to account for the Casimir forces betw...
The Nature of Star Formation at 24 microns in the Group Environment at 0.3 < z < 0.55
Nature Star Formation Group Environment
2011/10/8
Galaxy star formation rates (SFRs) are sensitive to the local environment; for example, the high-density regions at the cores of dense clusters are known to suppress star formation. It has been sugges...
Distance determination for RAVE stars using stellar models III: The nature of the RAVE survey and Milky Way chemistry
Stars: distances, Stars: fundamental parameters, Galaxy: abundances, Galaxy: disk, Galaxy: stellar content, Galaxy: structure
2011/9/29
We apply the method of Burnett & Binney (2010) for the determination of stellar distances and parameters to the internal catalogue of the Radial Velocity Experiment (Steinmetz et al. 2006). Subsamples...
The Core-like Nature of HST-1 in the M87 Jet
polarization—galaxies: active—galaxies: individual (M87)—galaxies:jets —radio continuum: general
2011/9/28
We investigate the total flux density, spectral, polarization, and Faraday rotation variability of HST-1 in the M87 jet during the outburst from 2003 to 2007 through multi-epoch VLA observations at 8,...
Multiwavelength campaign on Mrk 509. IV. Optical-UV-X-ray variability and the nature of the soft X-ray excess
galaxies: active – galaxies: nuclei – galaxies: Seyfert – quasars: individual: Mrk 509 – X-rays: galaxies
2011/9/27
We present the analysis of XMM-Newton and Swift optical-UV and X-ray observations of the Seyfert-1/QSO Mrk 509, part of an unprecedented multi-wavelength campaign, investigating the nuclear environmen...
Unveiling the nature of IGR J17177-3656 with X-ray, NIR and Radio observations
accretion accretion disks – X-rays binaries – binaries
2011/8/24
We report on the first broad-band (1-200 keV) simultaneous Chandra-INTEGRAL observations of the recently discovered hard X-ray transient IGR J17177-3656 that took place on 2011, March 22, about two we...
Nature, formation and evolution of High Mass X-ray Binaries
Nature formation evolution Mass X-ray Binaries
2011/9/27
The aim of this review is to describe the nature, formation and evolution of the three kinds of high mass X-ray binary (HMXB) population: i. systems hosting Be stars (BeHMXBs), ii. systems accreting t...
Unveiling the nature of IGR J17177-3656 with X-ray, NIR and Radio observations
Unveiling IGR J17177-3656 X-ray NIR Radio observations
2011/9/26
We report on the first broad-band (1-200 keV) simultaneous Chandra-INTEGRAL observations of the recently discovered hard X-ray transient IGR J17177-3656 that took place on 2011, March 22, about two we...
《Nature》杂志发表饶毅实验室研究成果
Nature 杂志发表 饶毅实验室 研究成果
2011/6/27
近日，北京大学饶毅实验室在《Nature》杂志发表题为“遗传学雄鼠脑内五羟色胺揭示性选择的分子调控”的文章。
饶毅实验室近年发现，脑内的五羟色胺分子以及表达五羟色胺的神经细胞对于雄性求偶至关重要，从而揭示了哺乳类求偶调控的分子和细胞原理。一般雄鼠在面临另外雌鼠和雄鼠时，多半追求雌鼠。饶毅实验室使用遗传学、分子生物学、药理学方法，通过改变基因而导致脑中五羟色胺不能合成、或者含五羟色胺细胞的细胞不能...
Formation of "Lightnings" in a Neutron Star Magnetosphere and the Nature of RRATs
neutron stars, pulsars, rotating radio transients.
2011/9/15
The connection between the radio emission from “lightnings” produced by the absorption of high-energy photons from the cosmic gamma-ray background in a neutron star magnetosphere and radio bursts from...
The nature of the infectious agents: PrP models of resistant species to prion diseases (dog, rabbit and horses)
Prion diseases Immunity Rabbit, dog, and horse prion proteins Molecular dynamics.
2011/9/15
Prion diseases are invariably fatal and highly infectious neurodegenerative diseases affecting humans and animals. The neurodegenerative diseases such as Creutzfeldt-Jakob disease, variant Creutzfeldt...
Basic randomness of nature and ether-drift experiments
Basic randomness of nature and ether-drif Experiments
2011/8/30
We re-consider the idea that quantum fluctuations might reflect the existence of an ‘objective randomness’, i.e. a basic property of the vacuum state which is independent of any experimental accuracy ...
Urban chaos and replacement dynamics in nature and society
bifurcation chaos fractal dimension logistical map replacement dynamics Volterra-Lotka’s model urbanization
2011/7/7
Many growing phenomena in both nature and society can be predicted with sigmoid function. The growth curve of the level of urbanization is a typical S-shaped one, and can be described by using logisti...
Urban chaos and replacement dynamics in nature and society
bifurcation chaos fractal dimension logistical map replacement dynamics Volterra-Lotka’s model urbanization
2011/8/29
Many growing phenomena in both nature and society can be predicted with sigmoid function. The growth curve of the level of urbanization is a typical S-shaped one, and can be described by using logisti...