X-ray burster
X.ray bursters are a class of binary stars which are luminous in X-rays. They contain a neutron star and a low-mass companion star. The companion fills its Roche lobe and therefore the neutron star is accreting matter from it. The inflowing gas forms an accretion disk around the neutron star. Sometimes X-ray bursters show a sudden increase in their X-ray luminosity, called X-ray burst. All properties of the X-ray bursts can be explained assuming that they result from nuclear fusion on the surface of a neutron star. The accumulated hydrogen-rich gas forms a layer on the surface. This layer ignites spontaneously as the pressure at the bottom of the layer is high enough.Luminous X-ray bursts can be considered standard candles, as the mass of neutron star determines the luminosity of the burst. Therefore, comparing the observed X-ray flux to the predicted value, relatively accurate distances can be determined. Observations of X-ray bursts allow also the determination of the radius of the neutron star.
came into the room - alone.
He seemed to sense danger in the air. His hands clenched at his
his servant's pose.
"You sent for me?" he queried of Miss Cornelia submissively, ignoring
before Miss Cornelia had time to answer.html">answer.
"How long has this man.html">man been in your employ?" he asked brusquely,
interest you?" she parried, answering his question with an icy
eyes.
"I came this evening," he admitted, still hoping against hope that
the moment.
But the promptness of his answer only crystallized Beresford's
tonight - " he said with grim triumph. "Now, I know who he is."
"Who is he?"
Bailey straightened up. He had lost his game with Chance - and the
it could be, but before they took him away he would speak his mind.
"It's all right.html">right, Beresford," he said with a fatigue so deep that it
doing your duty - but I wish to God you could have restrained your
came here to do."
"Don't you think you have done enough.html">enough?" Beresford's voice flicked
youthfulness. He turned back to the detective.html">detective soberly enough.
"This man has imposed upon the credulity of these women, I am quite
gallantry. "He is Bailey of the Union Bank, the missing cashier."
The detective slowly put down his cigar on an ash tray.
"That's the truth, is it?" he demanded.
Dale's hand flew to her breast. If Jack would only deny it - even
of any such denial.
Bailey realized it, too.
"It's true, all right," he admitted hopelessly. He closed his eyes
- every moment the scene dragged out was a moment of unnecessary
not only of the thing he is wanted for, but of the murder of Richard
.
On
wordlookup.net
All is still licensed under the GNU FDL.
It uses material from the wikipedia.
|
|