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As the starquake of neutron star induces the crust broken, the density in the crust may transfer from one state to another more stable state. We investigate the electron capture process near the outer crust during the starquake, using a level-to-level transition for calculation of electron capture. We find a new thermal source during the starquake of neutron stars, which may provide a new signal for detecting the activity of neutron stars.

Article :. DOI: It came from a dense, magnetized region of space, and was probably emitted by a young neutron star a compact core left in the aftermath of a supernova , says study author Kiyoshi Masui at the University of British Columbia in Canada. When the bursts, which last just a few thousandths of a second, were first discovered 2 in using the Parkes Observatory radio telescope in New South Wales, Australia, sceptics put them down to an instrument fault or interference.

Strange signals sometimes have a mundane explanation; a separate class of radio signals, known as perytons, turned out to have been caused by opening the door of a nearby microwave oven. But in the past three years, 15 more FRBs have been discovered, including by a second observatory, the Arecibo radio telescope in Puerto Rico, leading astronomers to believe that the signals have a cosmic origin 3 , 4.

Masui and his colleagues found the latest example using the Green Bank Hydrogen Telescope in West Virginia, the third facility to observe the strange phenomenon. The results are published on Nature 's website today 1. No single burst has been seen to repeat. Masui and his colleagues found the pulse by scouring through hours of archived data using a specially designed algorithm.

This took into account how such a radio signal would appear on Earth after smearing out as it travelled through space. They suggest that the burst named FRB for the date of its original detection, 23 May came from as far as six billion light years away — about halfway across the Universe.

Free-roaming quarks

Because the telescope receives signals from large patches of sky at any one moment, it cannot pinpoint which particular galaxy the FRB came from. Astronomers already knew that FRBs come from sources that are small — no more than a few hundred kilometres across — and very bright. Unlike most previous studies, the Green Bank data also revealed the polarization of the incoming light. The team saw a spiral pattern, which suggested that the waves had travelled through a magnetized region of space.

Starquake and Dragon's Egg , the novel to which it forms a sequel, contain some of the most unusual aliens ever envisaged by a science fiction writer. Forward, with an engineering background, has written some of the most interesting 'hard' science fiction. This is a term used for strongly ideas based writing, using the latest scientific knowledge and incorporating a great deal of physics as accurately as possible.

Dragon's Egg contains all the inter Originally published on my blog here in May Dragon's Egg contains all the interesting scientific background which is in the sequel: the carefully worked out microscopic processes and structures which make life on the surface of a neutron star - so dense atoms are crushed - not only possible but plausible.

FRB A Starquake-induced Repeater? - IOPscience

On the star named Dragon's Egg because viewed from Earth it could be seen as an egg laid by the constellation Draco , the processes on which this life is based run far faster than the molecular chemistry which makes earth biology possible, with the result that lifeforms on the star evolve incredibly fast, in days rather than millions of years.

So as a human spaceship orbits Dragon's Egg, they are able to observe the evolution of the chela from savagery to civilisation surpassing human knowledge. Starquake contains effectively three stories: a rescue of the humans by the chela when the systems designed to protect them against the tidal effects caused by the star's massive gravity fail; then the humans help chela society revive after a massive star-quake destroys civilisation; finally, the chelas, again surpassing mankind, save the humans from death brought about by their overstay round the star to help the chela.

The problem with Starquake is that the interesting ideas are identical to ones in the first book; character has taken a back seat to the physics in both novels, with the result that there is little to build on here. The chela are not interesting as aliens in a psychological sense: there are no massive differences from human sociology or even earth biological systems they are two-sexed egg-laying creatures for the writer to explore.

Jun 11, Jon rated it liked it. A bit of a disappointment in comparison to Dragon's Egg. Though it's still hard SF, I suppose, as any story about a civilization that lives on the surface of a neutron star must be, the cheelah behave just slightly too humanly for my comfort, despite having a dozen eyes each and looking like bugs.

Unique enough to hold my attention sufficiently to see how the story ends.


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Jun 15, Elizabeth Castro rated it liked it. Starquake kept me reading, but by the middle of the book I was so bogged down by technical "facts" I lost sight of any plot line that might have been. The world building Robert L. Forward uses is so intense I spent most of my time trying to process what I was reading. When I got to the last page, I thought, "that was it?

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AFTER the book is done there is an illuminating "Tec Starquake kept me reading, but by the middle of the book I was so bogged down by technical "facts" I lost sight of any plot line that might have been. AFTER the book is done there is an illuminating "Technical Appendix" that would have been much more helpful written into the story so I could have understood it better. I found the appendix writing more interesting than the actual book.

Jul 22, Constance rated it liked it. This is a squeal to Dragon's Egg. I gave Dragon's Egg 5 stars. This squeal was interesting but not nearly as intriguing as Dragon's Egg. You could read it or not after Dragon's Egg and I would not feel you have missed much but also it is a fairly quick read so if you want to know what happens to the Humans and the Chella next it is worth picking up.

Continuation of the story in Dragon's Egg. The fast living Cheela become space faring, only to have their world wracked by a quake that shreds the star's surface. Interesting story, probably best having read the first book, but I think sufficient backstory is provided at the start to get the gist. Great continuation to a great book. If you like hard sci-fi, read this.

I really liked the fonts on the cover of this book. Dec 04, Molezooka rated it it was amazing.

Apr 06, Wyatt Stafford rated it it was amazing. Another 'hard' sci-fi. Sep 16, Kirsten Zirngibl rated it really liked it Shelves: fiction. Starquake provides the kind of crises throughout which Dragon's egg was missing from its own climax. I enjoyed this almost as much as the first. I think the overall plot 3 plots really was actually stronger.

The Biggest Starquake Ever

What's interesting about this I. As long as the reader read the "encyclopedia entry" at the end of the first nov Starquake provides the kind of crises throughout which Dragon's egg was missing from its own climax. As long as the reader read the "encyclopedia entry" at the end of the first novel to understand the general world building, they would pretty much have what they need to jump in.

This is a nice touch. I liked the post-apocalyptic elements of the second subplot, even though I'm not generally a fan of the genre. Maybe it was because it was more about solving a large problem over generations rather than just pure survival. There was a lot more "high physics" in this book, as by now the Cheela have long surpassed the technological capacity of humans.

I don't mind all the time the author spends describing their technology. It's actually crucial to the plot for the most part.


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However, I think a little more exposition was in order, since some of the terms don't exist for 21st century humnas. Perhaps a Cheela teacher explaining to their pupil how understanding of gravity has progressed from the 21th-century Einsteinian view. I trust that the author could've handled that. Conventional human gendering seems to have slipped into this one a bit. While she ended up rising above this, her efforts still proved to be fairly meaningless in the long run. It's not a big deal, just a shade disappointing after the previous book. While I would've read a sequel to this, I don't think one is really warranted.

All in all, this was a really fun read. N Unnikrishnan I am inclined to say you are mistaken about the gender part. You forgot the Soother-Of-All-Clans, and many others. ANd its not true that Qui-Qui's eff I am inclined to say you are mistaken about the gender part. ANd its not true that Qui-Qui's efforts proved to be meaningless in the long run. The second Cheela civilisation owes its existence squarely to Qui-Qui and her knowledge and abilities.

Without her, it'd have been a back to zero game for Cheela evolution. Everybody dies in the long run, but that doesn't mean their efforts are pointless.