搜索结果: 1-13 共查到“高能天体物理学 Spectral”相关记录13条 . 查询时间(0.109 秒)
The Unusual Temporal and Spectral Evolution of the Type IIn Supernova 2011ht
Unusual Temporal Spectral Evolution Type IIn Supernova
2012/2/23
We present very early UV to optical photometric and spectroscopic observations of the peculiar Type IIn supernova (SN) 2011ht in UGC 5460. The UV observations of the rise to peak are only the second e...
Joint spectral-timing modelling of the hard lags in GX 339-4: constraints on reflection models
Joint spectral-timing modelling the hard lags GX 339-4 constraints reflection models
2012/2/23
The X-ray variations of hard state black hole X-ray binaries above 2 keV show 'hard lags', in that the variations at harder energies follow variations at softer energies, with a time-lag \tau dependin...
Spectral-Temporal Simulations of Internal Dissipation Models of Gamma-Ray Bursts
Spectral-Temporal Simulations Internal Dissipation Models Gamma-Ray Bursts
2011/10/19
We present calculations of the time evolution of the prompt spectra of gamma-ray burst models involving generic internal dissipation regions, including internal shocks, either by itself or in the pres...
Spectral and Timing Studies of Cyg X-1 in the Low/Hard State with Suzaku
black hole physics — accretion — stars: individual (Cygnus X-1)—X- ray:binaries
2011/10/11
From 2005 to 2009, 25 observations of Cyg X-1 were performed with Suzaku, achieving a total exposure of 446 ks. In all observations, the source was found in the low/hard state, while the 1.5--12.0 keV...
Origin of the Ultrahigh-Energy Cosmic Rays and their Spectral Break
Ultrahigh-Energy Cosmic Rays Spectral Break
2010/11/15
In this concise, albeit subjective review of structure formation, I shall introduce the cosmological standard model and its theoretical and observational underpinnings. I will focus on recent results ...
X-ray spectral state is not correlated with luminosity in Holmberg II X-1
accretion accretion disks – black hole physics – X-rays binaries– X-rays
2010/11/12
The ultraluminous X-ray source (ULX) Holmberg II X-1 has been observed over 4 months in 2009/2010 by the Swift observatory. The source luminosity varied by a factor of up to 14, reaching a maximum 0.3...
The spectral and beaming characteristics of the anomalous X-ray pulsar 4U 0142+61
pulsars individual (4U 0142+61) – X-rays stars – stars magnetic fields – accretion disks
2010/11/11
Context. Anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs) constitute a special population of young neutron stars, which are thought to be magnetars, i.e., neutron stars with super-st...
Gamma Ray Bursts Spectral--Energy correlations: recent results
gamma rays bursts radiation mechanisms nonthermal supernovae general
2010/11/9
The correlations between the rest frame peak of the F spectrum of GRBs (Epeak) and their
isotropic energy (Eiso) or luminosity (Liso) could have several implications for the understanding of the GR...
Spectral Cross-calibration of the Konus-Wind, the Suzaku/WAM, and the Swift/BAT Data using Gamma-Ray Bursts
gamma rays observations
2010/11/11
We report on the spectral cross-calibration results of the Konus-Wind, the Suzaku/WAM, and the Swift/BAT instruments using simultaneously observed gamma-ray bursts (GRBs). This is the first attempt to...
Enhancing the spectral response of filled bolometer arrays for submillimeter astronomy
spectral response filled bolometer arrays submillimeter astronomy
2010/11/11
The future missions for astrophysical studies in the submillimeter region will need detectors with very high sensitivity and large field of view. Bolometer arrays can fulfill these requirements over a...
Discovery of a QPO in the X-ray pulsar 1A 1118-615: correlated spectral and aperiodic variability
X-rays binaries — pulsars individual 1A 1118-615
2010/11/10
Aims. Our goal is to investigate the X-ray timing and spectral variability of the high-mass X-ray binary 1A 1118-615 during a type-II outburst.
Probing the Transition Between the Synchrotron and Inverse-compton Spectral Components of 1ES 1959+650
High Energy Astrophysical Phenomena (astro-ph.HE)
2011/1/6
1ES 1959+650 is one of the most remarkable high-peaked BL Lacertae objects (HBL). In 2002, it exhibited a TeV gamma-ray flare without a similar brightening of the synchrotron component at lower energi...
The X-ray Power Spectral Density Function of the Seyfert Active Galactic Nucleus NGC 7469
High Energy Astrophysical Phenomena (astro-ph.HE)
2011/1/5
We present the broadband X-ray power spectral density function (PSD) of the X-ray-luminous Seyfert 1.2 NGC 7469, measured from Rossi X-ray Timing Explorer monitoring data and two XMM-Newton observatio...