Chandra images show symmetric, 8 kpc long, arm-like features in the X-ray halo surrounding NGC 4636. The leading edges of these features are sharp and are accompanied by temperature increases of ∼ 30%. These properties, along with their scale and symmetry, suggest that the arm-like structures are produced by nuclear outburst driven shocks. We interpret these observations as part of a cycle in w...

We present a detailed analysis of an outburst of activity in Comet C/1995 O1 (Hale-Bopp), which coincided in time with an increase in X-ray luminosity of the comet. The outburst produced a cloud of material expanding through the coma and is visible in images obtained with a continuum filter and a CN filter. The evolution of its intensity in both the dust and the CN could be well fitted by a Max...

We present results from a 57.6 ks Chandra observation of the cluster gas associated with the fat-double radio galaxy 3C 310. We find a surface brightness discontinuity in the gas outside the southern radio lobe that we attribute to a shock driven by the supersonic inflation of this lobe ∼180 kpc from the nucleus. Modeling the surface brightness/density jump, the shock has Mach number 1.51.9, de...

We report an eclipse mapping analysis of time-resolved ultraviolet spectroscopy covering three eclipses of the dwarf nova IP Pegasi on the late decline of the 1993 May outburst. The eclipse maps of the first run show evidence of one spiral arm, suggesting that spiral structures may still be present in the accretion disc 9 days after the onset of the outburst. In the spatially resolved spectra t...

The 1998 September outburst of the black-hole X-ray binary XTE J1550−564 was monitored at Xray, optical and radio wavelengths. We divide the outburst sequence into five phases and discuss their multiwavelength properties. The outburst starts with a hard X-ray spike, while the soft X-ray flux rises with a longer timescale. We suggest that the onset of the outburst is determined by an increased m...

We present results from a Chandra observation of the cluster gas associated with the FR II radio galaxy 3C 438. This radio galaxy is embedded within a massive cluster with gas temperature ∼17 keV and bolometric luminosity of 6×10 ergs s. It is unclear if this high temperature represents the gravitational mass of the cluster, or if this is an already high (∼ 11 keV) temperature cluster that has ...

Objective: Many behavioral problems are resulting from inappropriate parenting styles and inattention to behavioral-emotional difficulties in childhood. The purpose of this research was to examine the relationship between parenting styles and dimensions of children's maladaptive behaviors. Methods: 120 six-year old boys, who were enrolled in the first grade of elementary school, were selecte...

Pore structure and methane adsorption of coal reservoir are closely correlated to the coalbed gas occurrence outburst. Full-scale pore its fractal heterogeneity samples were quantitatively characterized using low-pressure N2 (LP-N2GA) high-pressure mercury intrusion porosimetry (HP-MIP). Fractal capacities between outburst nonoutburst coals compared, their geological significance was discussed....