搜索结果: 1-15 共查到“天文学 plane”相关记录27条 . 查询时间(0.109 秒)
Astronomers have obtained observations of the smallest asteroid ever characterized in detail. At 2 meters (6 feet) in diameter, the tiny space rock is small enough to be straddled by a person in a hyp...
John Plane教授应邀作“宇宙尘埃、彗星、流星和气候”学术报告（图）
宇宙尘埃 彗星
2016/4/15
2016年4月5日下午，国际著名空间和大气化学专家、英国利兹大学化学研究与创新中心主任、Priestley国际气候中心副主任、2005年英国皇家化学会化学反应机制动力学奖获得者John Plane教授在水上报告厅为我校师生作了题为“宇宙尘埃、彗星、流星和气候”(Cosmic Dust, Comets, Meteors and Climate)的学术报告。本次报告为“地球和空间科学杰出讲座”系列报告...
Globular Cluster Evolution in M87 and Fundamental Plane Ellipticals
M87 Fundamental Plane Ellipticals
2014/12/23
The globular cluster population in M87 has decreased measurably through dynamical evolution caused by relaxation, binary heating and time-dependent tidal perturbation. For fundamental plane elliptical...
A Southern Sky and Galactic Plane Survey for Bright Kuiper Belt Objects
Southern Sky Galactic Plane Survey Bright Kuiper Objects
2011/10/17
About 2500 square degrees of sky south of declination -25 degrees and/or near the galactic plane were surveyed for bright outer solar system objects. This survey is one of the first large scale southe...
The Demographics of Broad-Line Quasars in the Mass-Luminosity Plane. I. Testing FWHM-Based Virial Black Hole Masses
Demographics Broad-Line Quasars Mass-Luminosity Plane
2011/10/13
We jointly constrain the LF and BHMF of quasars using a Bayesian approach that describes the underlying active BHMF and Eddington ratio distribution to match the observed distributions in the quasar m...
A Sino-German $λ$6\ cm polarization survey of the Galactic plane VI. Discovery of supernova remnants G178.2-4.2 and G25.1-2.3
supernova remnants – ISM: individual objects: G178.2− 4.2, G25.1− 2.3 – Radio continuum: ISM
2011/9/27
Supernova remnants (SNRs) were often discovered in radio surveys of the Galactic plane. Because of the surface-brightness limit of previous surveys, more faint or confused SNRs await discovery. The Si...
Galaxy Structure and Mode of Star Formation in the SFR-Mass Plane from z ~ 2.5 to z ~ 0.1
Galaxy Structure Star Formation SFR-Mass Plane
2011/9/27
We analyze the dependence of galaxy structure (size and Sersic index) and mode of star formation (\Sigma_SFR and SFR_IR/SFR_UV) on the position of galaxies in the SFR versus Mass diagram. Our sample c...
Constraints on a hadronic model for unidentified off-plane galactic gamma-ray sources
hadronic model unidentified off-plane galactic gamma-ray sources
2011/1/10
Recently the H.E.S.S. collaboration announced the detection of an unidentified gamma-ray source with an off-set from the galactic plane of 3.5 degrees: HESS J1507-622. If the distance of the object is...
Discovery and follow-up studies of the extended, off-plane, VHE gamma-ray source HESS J1507-622
follow-up studies off-plane VHE gamma-ray source HESS J1507-622
2011/1/10
Context: The detection of gamma-rays in the very-high-energy (VHE) range (100 GeV-100 TeV) offers the possibility of studying the parent population of ultrarelativistic particles found in astrophysica...
Measuring the flatness of focal plane for very large mosaic CCD camera
Measuring the flatness focal plane mosaic CCD camera
2011/1/13
Large mosaic multiCCD camera is the key instrument for modern digital sky survey. DECam is an extremely red sensitive 520 Megapixel camera designed for the incoming Dark Energy Survey (DES). It is con...
The Bolocam Galactic Plane Survey IV: 1.1 and 0.35 mm Dust Continuum Emission in the Galactic Center Region
Galactic Plane Survey Galactic Center Region
2010/11/10
The Bolocam Galactic Plane Survey (BGPS) data for a six square degree region of the Galactic plane containing the Galactic center is analyzed and com-pared to infrared and radio continuum data. The BG...
No evidence for a dark matter disk within 4 kpc from the Galactic plane
rk matter disk Galactic plane
2010/11/11
We estimated the dynamical surface mass density () at the solar Galactocentric distance between 2 and 4 kpc from the Galactic plane, as inferred from the observed kinematics of the thick disk. We fin...
Identification of a Population of X-ray Emitting Massive Stars in the Galactic Plane
stars: winds outflows – stars Wolf-Rayet – supergiants – X-rays binaries – X-rays
2010/11/16
We present X-ray, infrared, optical and radio observations of four previously unidentified Galactic plane Xray sources, AX J163252–4746, AX J184738–0156, AX J144701–5919 and AX J144547–5931. Detection...
Biases in the Quasar Mass-Luminosity Plane
black hole physics — galaxies evolution — galaxies nuclei — quasars general — accretion accretion discs
2010/11/11
We report that the reported sub-Eddington boundary in the quasar mass-luminosity plane (a departure from the Eddington luminosity limit for the highest quasar black hole masses at a given redshift) is...
The Bolocam Galactic Plane Survey: Survey Description and Data Reduction
methods data analysis surveys ISM clouds submillimeter ter
2010/11/10
We present the Bolocam Galactic Plane Survey (BGPS), a 1.1 mm continuum survey at 3300 e ective resolution of 170 square degrees of the Galactic Plane visible from the northern hemisphere.The BGPS is ...